Where can everybody hear me okay
I think you are applying for today is
Who want to go through assignment number to a posted assignment number 2 on D2L
So there is an assignment there is that the handful of slides that I want to show here that I haven't talked about
That is also on D2L and and the program exam and 2D which is the first
Program that we're going to use is also on on D2L
Amanda and so you can choose to to run that off of the virtual server you can also install that on
Turn on machine and using it for years it's clean it's a safe program it it's relatively straightforward
You can do it either way
I don't have very much to say inside this will probably take about a half an hour or two
To explain the assignment
And then to go through how examine 2D runs and rs2 runs
And the remainder of the hour-and-a-half that we thought would be another probably 50 60 minutes
Is a chance for you to start play with these programs get two results out of them and understand
Send holiday what is Simon's trying to achieve and what we want to do here
It's it's it's very simple numerical modelling the intent is
Is that we we start to explore this idea of Mining and do a stress so
A couple that with the first assignment that we've done it it gives us the tools
We need to do to do the design project it. That will be coming very quickly in this course so this is Simon.
Standing up today it will be due next Thursday and again to be emailed to me
Dropbox that'll be due on the 8th of May
It will be due on the 5th of November so in about a week and it shouldn't take you that long to
Book through it a lot of steps inside this
And and the idea is just that you become familiar in particular with the space to program because you will need it
Inside the design project which will require Thurmont work
So it's inside this topic morning to do stress the first thing that we have to do is understand the problem
We want to look at
And when we when we understand what we want to do then we've got to put the
Geometry that we want into
The one of the two programs examine 2D or rs2 will put in the
Stress directions for that apocalypse about that we have to pick a constitutive relation of so what is the
Stress-strain Behavior but that we're going to have for the problem now
Examine 2D is a simple linear elastic isotropic homo genius relation
And it doesn't get any more complicated than that and so it's limited what I can do but there's still some value and under
Understanding yet stick your voice one week compared to RS to which allows
For failure. Actually occur so we'll talk a little bit about these assumptions how we actually run the model I'll run through
Throughout examples of both examined to DNR stew and then how you interpret the results how you look at the results
We're trying to do more than about 30 minutes or so
So are our problem if you've downloaded this point
If you hadn't it is on D2L
I'm going to bring it up on the screen here
So it's on today October 28th to do next Thursday November 5th
I would think there's trouble between 3 and 5 hours of work and they're so that there's not a lot of running
Programs take seconds to do so the majority of the door. Will be going through that the 14th
Questions that I'm asking and then writing that up
So our challenges we've got ourselves a Crusher and jaw crusher is
You can see David discernment yes
Yeah yeah thank you so we're going to pressure this 12 metres wide 14
20 and 50 M below surface
And we need some things around that we've got beside an in Orange there's an electrical substation which is 10 metres wide
12 metres long and 6 metres high so insubstantial
And the end and the way a Crusher works is there is a norpass that feeds into this
The crushes The Rock inside generally inside a jaw Crusher because jaw Crushers are much smaller than
Gyratory Crusher generally used on Surface for big tits are
Upper small and material on a smaller mine that material roll into the jaw Crusher will be crushed
Just actually and then we'll drop down a raise which is only about a metre or two in diameter into a bin
Underneath. Ben is about 6 metres in size
End up
I'll talk about more about Material Handling Systems as we get into the design project but this this is
General a fundamental piece of infrastructure for some Minds
Because the size of it or that's coming from the stove to just too big to be hoisted or tubing on a conveyor
That's you got to break it to a size that we can properly run from Material Handling system and so
So every time or in mine runs through the sink imagine if you have instability inside this this Crush
Exclamation or around the structure activation this is a bad thing because now there's no means of actually getting
Or from our soaps surface so this is really a key bottleneck inside our
Our Materials Handling system in that hopefully you talk about these things in your materials Highland course this term
Leah because we're taking this Orion and it's generally there's some
Voice trainer but it's generally fairly dry and the crushing process potential
Real Cricket huge amount of dust we got a Drifter running over top of it and this draft is quite long
5 metres y 5 metres high a metre in diameter and there's a dirty great fan
And on this in the whole idea is is this fan run so why were crushing your it sucks the Dust
Sealing up the structure and and keeps that the work area where we
Usually a few people working fairly clean and and dust free
So this is a very three-dimensional problem none of the dimensions here are particularly long so the whole wide
This is a really great case for making it a 2d problem using play
Play Extreme doesn't completely make sense but what we do know is by
Using plane strain
It's
It's an overestimation of the stresses
So if the morning in distress is that we've got our our our higher-than-expected in our design to stay
Table that we know that we got a good design if if the monitor stresses show the
Failure to change the design or try to compensate for this this so the fact that it's a
Three dimensional problem in two dimensional geometry
In the end we could go to a three-dimensional program
That gets a lot more complicated there's a lot more effort that has to go into a particularly one we start
The Rock Mass
And again these are the tools you want to use in the design project so we could go to 3D but it because
Under normous project and so we will we will make this key assumption that.
That we can live with the results of plane strain
And talk with look at this problem we said what we want to understand this we have to cut a section through
Do that a vertical section
Let's go to corporate all of these aspects The Crusher the end of the substation the bin of the drift
And so if we cut a section that runs through all of those we can look at the mining and distress is around
And I'm
So a section through the middle of that would show us a dust drift on the top the crusher are electrical
Station and are fine or been that the total holding the order that we've got from our Materials Handling system
There is a raise that goes from the dust trip to public rusher and it is a raise that goes from the final
Norbit up to the bottom of the crusher weather for runs out but it when you look at it from
Geometry perspective these are really really small compared to the jump Riverdale
This becomes one of our assumptions one of our assumptions is cheerleaders raised as pretty small compared
Everything else it's not going to change a lot of my stress is cuz it's only a metre or so and I am
So we can make this assumption that it's not there because it's so small
And you might say well where are the other drifts that lead into this cuz of course you have to have drifts between your substation your
Pressure and cramps that connect to this we are going to make this assumption they are relatively
Small and remote from the problem we looking yet so we don't have to worry about them and
Engineering is all about simplifying your problem by making good assumptions it sometimes you test those
Options to make sure they make sense
Who is the geometry that we want to build inside our programs and so will end up
So starting on page 5 it it list basically what I'm looking for the right up so the first
6 questions here are all about elastic stress using a
Examine 2D
And that we're going to convert it
And and and do the same type of problem but we're going to use this program rs2 and we're start off using our
Rs2 in an elastic mode so so although it can do nonlinear problem
Where can I buy music in converted over to a plastic
And see how that changes our results and then there's a few questions at the end of the talk about
About the assumptions that were making and a little bit about the use of plane strain
Train a little bit about the use of mulch
So in a nutshell how do these programs work
So we bought a space
And we have stresses applied to it
That stress is is through into an art Iraq mess with anyone
On point and if this is our Crusher area which is
1150 m
Starfish
The stresses are relatively the same at any one point inside your if we create an excavation
Inside this
Stresses cannot run through that boy so the stresses are forced to go around it and with a
Stress field in this orientation we would expect to see a stress increase in a roof and a stress increase in our
Flooring this simply comes from this Stream flow concept
And so there is an increase in stress in our roof
Anacrusis stress uniflora
Numerically what the program is going to do is it's going to take these nodes and an order
This drama created
And create a series of notes and we can Define how many note that we want
To try to get more or accuracy in our problem
And for each one of these notes before the excavation exists there is a stress field of signal 1/2 in
Three on that point
The moment we create our excavation the stress is no longer exist in
And at the surface of the Boyd we look at the stress running in this direction
Or this direction of this direction if if if we had a stress acting in the stress
Directions
Because there's a boy inside of his nothing opposing it
It would be moving
And it's not so means that the perpendicular stresses
In the wall
And the roof must be zero and Enzo so we've now change the stress can
Condition of any one point from a signal one two and three to some sort of signal one
And sigma 2
And sigma 3 which is perpendicular is 0 and
Mxit we got unbalanced stresses at this point
So the program will calculate
In an iterative process what would the stresses have to be inside at each one of these points
To to get to a stable situation and the answer is simply in the miracle calculator
Haitian that's done that that estimates water the stress is it each one of these point
They gives us the induced dresses at the boundary but what about
Often the medium off to the rock around it where work stresses are increasing and decreasing and we're putting other grip
Sir or things like that
Show to calculate with these dresses are if we assume
This is a linear elastic problem
And it's isotropic and homogeneous we can simply use the law
Laws of elasticity hooke's law
Estimated we know what the stresses are here we can calculate what the stress is are at any other point
So this point here we can calculate what is the induced signal one
I be induced
Take me to an induced Sigma 3 or the the the mining in distress
Cuz that anyone that's what are examined 2D is doing
The problem with this type of analysis is that if tsums a constituent of relation
The Rock mass is infinitely strong
So if we take
Stress strain relation a linear elastic relation
Is one that's infinitely strong there is no failure and and the dead
Defamation is proportional to the loading that we place on it
And we know that that's not really representative a rock mess and I'm so so there's
A lot of limitations and what we really want is a constituent relation or stress
Extreme Behavior that's more representative
Of a real rock bass
And so we can do that by by changing the constituent relation
Sewing rs2
We can put in
Nonlinear
Constituent relations still at the relation that we're going to use is a strain softening
A strain softening is
Linear elastic and once we reach
A certain yield point
RR Rock mass will fail and as we add try to add more stress will simply get more defamation
And then we'll get to a residual strength
A representative way of talkin about stresses and strains
In around excavation
The problem is is how do you do that inside the medium we can we can calculate what the stress is are here
Your weather is going to be here because we've got the street know it's a weird Define but we don't have that inside or medium
So what we're going to do is we're actually going to create
A mesh
Around or excavations
And the mess will be more fine
Corsica recreational be less fine for their awake so we can ply or boundary conditions are premiering cig
Turn signal to Insignia 32 this we know what your stressors are going to be when we resolve them at
The surface but then we can look at each one of the weather's an intersection
Avatar mesh and say we can calculate what are the stresses that each one of those point
And if the one of these points
The relation is still linear elastic that's fine but if we exceed our yield
White sore stresses go to High then at that point that point will follow this constituent
Relation of yielding going to a residual strength
And and when we try to put more stress has on that it will push the stresses the next closest node
Answer again it will be a solution of two or three or five hundred different
Our runs but eventually we get a solution where some of the the nodes have yielded
Bale based on this constitutive relation
And some of them are still stable on the linear elastic side of it and this is what are rst program
Thomas do it
That is in these programs run
There's a lot to this that that we this is using a method call finite element
What you might have heard of
Are mechanical Engineers do have a couple of courses in finite element analysis
Where they will create a shaft or create a beam and they they will do.
Exactly the same type of analysis using relatively simple programs to look at what
The stress-strain behaviour inside that Shaft or that wheel or airplane wing or something like
So this is essentially what they're doing in a finite element analysis
Questions
So it sounds like these are pretty complex programs it's because these are pretty complex programs
And when you go on to the virtual drive there will be tutorials for exam
Dammit Trudy and and are Sue and I would encourage you to go and spend a half an hour looking through those
I think I've given you enough notes inside this if you would you do the download realize why is it separate
Hey just because I give you basically a a recipe she just to go through a full sheet to go through
Get what we want out of the program because they date you can do a PhD thesis
SRS to program it is very sophisticated
Go back to our assignment so after we've used our examine 2D to look at elastics dresses
Then we will use rs2 which can also run elastics dresses and then we will
Change to Joe plastic mode and the and the way that the plastic mold
Is that we will use a rock Mass classification which in this case is a GSI a GSI
Five basic equipment to the classification and it will downgrade
Play the material properties based on on this GSI so that the rock is
It's going to have a GSI of 65 but if they're at the Roxbury
The GSI will reduce which will reduce the the elastic property
And that will allow us to see how our straps is are changing
So the questions here are pretty obvious that that we want this electrical substation relatively close to Ark
Pressure because if it's further away there's complications in his extra cost involved with it
What if we get too close if we put it one metre away the one metre Rock in between wolf fail
So having an either way it doesn't make sense
We could push this electrical substation hundred metres away so be very far away and end it would be
No stress and erection but it doesn't make sense that could be a more expensive and more complicated do that
We want to know how close can we place this electrical substation without causing failure
Inside the Rock in between it and 5 metres isn't the right answer that's a good starting point
Similarly with this District that that we don't want this Duff dust Rift to to cause any sort of
Stress failure inside the roof of our of our Crusher
So this dumpster is has to be some distance away and we have to figure out how far away it would be such that
Set the crusher doesn't influence the stresses on the desk strip and the desk strips stress around
District doughnut was the crusher
Similarly for the Ben if we place the Ben to close then then the rock underneath will clap
Slaps the floor of our pressure will collapse and everything will fall on the men that would be bad but we don't want this raise
Is between the crusher in the band to be too long so what's an Optimum distance in between there
That's what you're trying to resolve inside this
So the first step is understanding of geometry and and what it looks like and and the
3D pictures sorted gives you an idea of that
We're going to use this Assumption of plane strain
To make it a two dimensional problem knowing that plane strain is conservative and so there if it stay
Stable were acceptable in a plane strain condition it will certainly be acceptable in the n-3 metropro
Within go to input or Fields dresses into the problems understanding what direction to Fields dresses have to go
And then we'll run our programs and we'll start off with examine 2D with linear elastic
Then we will try the same problem but using rs2 running elastic
And then will change over to a plastic mode where failure can occur based on this strange softening and will use with
Call the General Lightfoot Brown failure Criterion in the possible this
Rob Bell
Numerous options we're going to stick with the one that we've we've talked about so far class
After that the next step is to interpret the results
And and Diane so I'll give you an example of this will look at what are the stresses in in both
The elastic in the plastic will play with how we could change the legend so we can get a useful result out of this
And now we're going to look at something called the strength factor and the strength Factory simply but the rock mask
Sprint
/ the mining induced stress
Where this rock Matt strength is a function of the strength of The Rock
The Rock masks itself that says represented by a GSI classification
And I'm in the constitutive relation will change
If there's failure so are rockmass strength will corporate all three of these
Assuming we got a plastic Deli
Are concentric relations I've talked about this before that the simplest mode is is
Linear elastic or we soon Oakdale you ever occurs or elastic perfectly plastic works
Salt mines you can use a strain softening brittle and we're going to use a base
Best way to strain softening pipe Behavior so be linear elastic up until we reach the strength of our
And and then it will yield it will fail and give us a residual strength
It is one we got a fail Rock Mass if it's still confined it still has some strength
So far I will go through these step-by-step but again putting our inputs into our program
Define material properties choosing tribulation creating the mesh running the problem
When looking at the results and that's sort of the steps we're going to go through inside this that's the steps of the handout
Questions
So I logged into the virtual server and I'm going to
Connect into that
Then like that
So on your screen what you should be seeing is I've logged into the virtual
Virtual machine at The Universities at correct
Yep okay
You can run you can run exam at UT from here or you can run it
I've given you a zip file that you can load into machine
You can do it either way all I'll run it from here
So here's examined 2D
And
As I say there's there's decent tutorials for this so if you click on get started
Will lead you through of a lot of options and I encourage you to spend a little bit of time looking at and seeing how they
Describe how the program runs I've given you that the Reader's Digest version of it
As far as as needing to be able to run these programs
For final exam
That's not going to happen I just simply don't trust
The network in a final exam to be the operational so so you should know how
How they work and you should know what the results are but I'm far more interested in in the results and what they mean
That I am up the mechanics of actually running the program so you will need this for assignment 2 you'll need it for fraud
But I'm not going to test you on what button do you press to make this happen and examine
2D
And so I'm just going to Simply create a couple of excavation geometries and you can do that
By going to boundary and excavation
And then picking some points
Excavation number one and I can go and say while make another boundary
Which would be stored warm my electrical substations going to be
Opera square and another one
4r electrical substation
And then we need this bin underneath so I'll make one more excavation down here and so you can
You can try to follow along the point or you can simply in the bottom right corner click type in The Cordon
Which is a lot more precise way of getting the dimensions the exactly want
Geometry over on the right is the stress feel that we're going to put in soy
Do I put in a stress field of
30 MPA
And a segment 3 so bye-bye definition inside this program signal
One is horizontal
So if it say it would be running flat and sigma 3 by definition
Fashion is vertical I'm still going to give that on 6/18 and in a plane
Steric strain problem
Stresses in the third Direction perpendicular to the page
Our is our Sigma said this is the constant Direction I will put this at 25
If we wanted to rotate our stress is so right now it is going this direction 30
Best Direction 18 and then perpendicular page is 25 if we wanted to rotate
Are Sigma one from an angle different than horizontal we could simply add in a direct
And you'll notice is a little Elemental Square here and the length of the air was portional the distress
So if I went my Cigna three were five
Instead of 18
You would see the Arrowwood shortened
So if I wanted to change the angle I can simply put an angle from from this direction
And so if I would have put it in at 30 degrees
You would now see that that are principal stresses oriented at 30 degrees
And by definition or middle principal stress is perpendicular to that so we can change the orientation
For this assignment you won't have to do that
For your project you will probably have to do that
So I'll put this guy back to zero
And
Here we've got the elastic properties that we can put in that I've given you
And we can change to a different failure criteria so we will go to Brown
GSI classification
And we can put in our material properties so I'll put in a number 200 here
And maybe a GSI classification of 45 which is not very good
And maybe an M12
So these are elastic stresses that there is no failure
And end on the left hand side you can see here's a scale on this is the mighty distress
So so think of our streamflow that we've got stress is our Maxima principal stresses horizontal so
Sodastream's going to come around the crusher over top of the crusher and and we can see that that
The stresses of going up
Add a long distance away our stresses are the Premier Inn Expresses of 3025 and 18
But as we get closer there's a mining and do stress and clearly are stresses have gone up
In the roofer Crusher and the crush the stress has also gone up a little bit in
And then this pillar between are Ben and ARA Crusher
And you can you can use the slide turn on the left hand side to to see that you can
Also address this Legend cuz this Legend gives us a much wider range that we probably need
So you can go and you can change that my boys are contour options
And I'll say I wanted to go from zero
280
And I want 2016 intervals so that will give us
5 MPA
And so there's no more useful way of above looking are stresses and you can see that
There are streamflow analogy works really good here because our stress is going around the crusher the concentrator
Houston see some red underneath are some oranges the red so so mining in distress is in the floor
Does dust reactive gone up to 70 mph or higher in the
And the roof for the top of our bid they actually exceed rrad mph to let's go back and check
Change your scale
Make it to 100
+ 20 show going to be 5 mph increments
And and you can see now we've got stresses that get up into the 90 MPA in the back of the crusher
If we decide we want to make this dust react closer
We can move it
As we get closer or stresses go up and once we get to close the stress is getting really hot
The course will be bad
So we can move it further away and once we move it to a certain distance
You realize that the stress is virtually don't change it all so so you can find a happy point
What were you say okay while maybe the stresses are too high here
And there their they're acceptable and you can do the same thing for the other excavations
Store
Ben
Because the pain is larger and you can see it and you can see that the induced dresses are large around
On the bend
Think about the streamflow so you about the streamflow coming from the left or the right or the right to the left
And it's blowing around the crusher but there's not very much
The district's not very big so it doesn't have a big influence
Bought this bin is quite tall and so when the stress is come around it there there is a
Significant wrapping around in the top and the bottom of this of this been which is why this
Are there and they are here
We could reverse them
And you would see you got the same problem so it's the shape of this bin that's the issue Force
And so as I move these things around the program is actually dynamically recalculating distress
All the nodes there is a hundred or so nodes on on each one of these excavations
Losing elasticity to calculate what is it stresses in between
Here we got our electrical substation
And it maybe that's not the right shape so I think we can go and we can actually edit that
Stream flows in this direction and effectively it's in the shadow that but it's like
Like putting a pier in front of a pier that it doesn't influence
Streamflow moving in and I can move this guy around
And it doesn't increase the stresses the fact that the stress is here decrease
This is where I'm Waters Eddie and decide on be beside are on a bridge Pier
Until we get really close and then it starts having excellence
But if we were to say well let's put this thing in the way of our streamflow in here
And you can see things get pretty bad in a hurry so that becomes a really bad place from Imani distress
Perspective
4 / for placing an electrical substation so we won't put it there we'll put it here where it has
That's essentially everything that you need to know about exam maturity it is a sin
Temple to run as this you got to get to Geometry right and there's some questions about one of his dresses
And when you move them what the distresses get to be so we've been looking
Sing at the maxim principal stress you can also look at a whole range of other different fact
Actors inside here including a strength factor which will look at
And okay this is not pretty
So I'm going to change my Legend again a bit cuz I don't find it that works particularly well for me
So I'll have it go from 0 to
2
And I'll have it in 10 increments
That's a little easier to see factor means that below
Strike factor-1 are induced stresses are greater than the strength of the rock mass and so we will
Sumit failures going to occur and so ability lime green
Suggest Miss Jamba tree
That there will be failure and that there would be failure between the back of the crusher in the dust ripped and or the crusher
And
And I've been down blow up so pretty clear these guys are too close to each other
So how am I calculator Stress Factory this is an elastic program the way it's due
Doing is it saying this is what the EDD money to stresses are and we know what the strength is
From The Rock has characteristics that put in
But what it doesn't do is if the rock fails it doesn't adjust the stress is so the stress is just keep going up
Higher and higher up so so if our strength factor is less than 1 this is a bad thing
And and failure Whitaker so we can move his excavations further away and when we do that
We can get to a point where
Now we don't have failure
Answer based off of your geometry and you should be able to figure out
How far is it to park tribute Park so that that the induced stresses don't cause Rock failure
We don't want our infrastructure excavation
Actress kind of useful
Questions on Elvis
Alright let's run rs2
So I'm going to close this guy
Should not close up
Parallel
I want to close exam
Examine 2D
And we're going to open up our stew
So there's an awful lot more things that are stucken Duke and and
I don't encourage you to spend too much time fiddling with these cuz you can spend a lifetime doing
That's not our objective here so
I'll run through an RC problem and how we set it up and then I'll come back and explain it a little bit more so it starts off
The same way as the previous problem we create ourselves
An excavation
I might be our Crusher and we'll make ourselves another excavation
Which will be the bin underneath
Add another excavation
Albert dust Rift
And one more for electrical substation
So that way if we bought our excavations our geometry and place we need to place
A semi infinite boundary around that so we're going to add an external boundary
What will dismiss template make a box
And so there's RR geometry
And from there we can say well now we need to build his mesh
And so here we built this mesh in and around it
And every all the material inside this is made of material one and we can go to our
Properties in Define materials
Change our material properties so we want to go from
Currently in elastic problem
Plastic problem we can do that and we use are generalized Brown
Failure criteria
There's a GSI so we can put in our results for that we're going to run this in an elastic mode to begin with
Camera zoom in on our problem because your boundaries supposed to be infinitely far away
And right now there's no expectations who got a geometry but nothing's mind up so I'm going to go inside
Change the material inside the crusher
And I want to change that from Material 1 on Wednesday on an excavator
And the same thing for a dust Rift
And excavate
Substation
And in around our bin
So now we've created a geometry there's a series of nodes around on the boundary and inside
Got the medium and it's going to calculate stresses that every one of these little circles for stop
As we've got essentially the same type of problems we had before but now we can run it in the linear elastic and if
If we want to move these guys around
We can do that
The problem with moving it around is the moment you move it the previous
Match doesn't work anymore is the mess is boundary dependant so once we've done that
Excavate
And we got to redo our match
RR Foundry
Properties in then we need to put in our Fields dresses and we're going to use a,
What's the field stress so in the previous problem I use the sigma one which is by definition is horizontal
I'm so like I did for the examine 2:30
If I use 30
And sigma said 25 and are Sigma 318
And again our little arrows here will show us those links so now we've got a field stress
Dresses that are put in ricotta geometry we got a Boundary Water material properties
We're going to ask the problem whether they
Are suja solve this problem Force so everyone else has
And compute
So it took about a second or so to run the results we don't
Don't see anything here and the way ours to his setup is there is the mode for building the problem
But if you want to look at your results you open up a separate module so if we click one interpret
Are the results of RR student houses
I don't find that Legend particularly useful as you can go and you can change that
To whatever you want so I have to go from zero
To a hundred
It with 20 increments
And now we can look at the modding induced dresses around our problem and because
This is inelastic analysis we should expect results this sort of look like but we had
Inside examined using the same considered relation
And we can while looking rrstar maximum principal stress that but we can also look at
Strength Factor
Based off of this you'll decide whether how close is excavation should be to each other
Now knowing that Iraq masking potentially fail
This has been running an elastic mode so let's turn around and run the same geometry
Syrup from exiting ROM problem
Restart it
So let's run this in a plastic mode where the rock Master fail
I'm so we're going to go to our properties of a rock mass and Define our materials
And we're going to go to a plastic
And so we can put in our our rock my strength so put in a Hyundai
And will believe 54 on text strength
BK
Because our rockmasters yielding will assume that are rgsi changes to 30
I use 35 in in the in the assignment
So that the GS2 classification is changing because when The Rock mats fails
Blowers are material properties
And now we can run exactly the same problem this will take a few seconds to run so
Butte
Aya made a mistake on that I want to work that
We change our project settings
Show that the distress is don't the tolerance goes down to the nearest 0.1
None of the stress is changed by more than point one it'll give us a result
And put that in the assignment
Yes
And now it's running are our problem
Loganville use analysis and interpret
And here's our problem
And I want a dresser Legend a little bit
Astros
Stress is going to be around this
We can show our elements as as was made by Ramesh
I'm looking at a maximum principal stress and we can look at our strength Factor if we want
And what it shows is our strength factor is
I got the right stress field inside their strength factors route the Baha'i
And it will show us
We want what elements are failed so so if an element exceeds the stresses
It'll show it so it's showing its hear that that essentially all the elements of fail the ground has failed
Rod over excavations
So pretty clear in this geometry and the stresses
But they're too close to each other
That's essentially all you have to do through the hand out there there is
Is a step-by-step on how you do this so on page
For an ultrasound 5 and 6 it'll blow by blow step by step
What you have to do to to get results from your grandma too and your your face too
So these are too close to each other we better change them
So we would have to go back to our original are assumed all and say okay love RR
Electric substations to close we need to move that
Now we can move it further away
X-rated material in it
And then we could remake our match
And so were examined to 2D was was
In real-time redoing the calculations particular in the plastic mold for our students
It's a lot more balls and doing the calculations you got to rebuild the drama to rebuild the mash and then
Analyze results and interpret the results
It is pretty straightforward
So I'm going to leave the rest of the class will run a little bit long I love the last
Half hour I would encourage you to open up these programs and get them to run
And and and see how you go and I'll stay online for that. But I thought really nothing more to say unless
Search there's any questions
Okay thank you