W1 Morning Lab Activity CAE May 8 2026

追加: 2026-05-10

[00:00:01]Hello folks. This is the activity for the uh lab one uh of the morning session and you're asked to create this part first and then uh you these units are inches etc and then later on apply material to it and then assume that the inside of the hole is clamped that inside surface is clamped and a pressure of 100 PSI is applied to the top flat face this flat face. Now you're also asked to use local mesh refinement around the hole, but that that's not the issue right now.

[00:00:40]You are expected to use any planes of symmetry if they're present if at all.

[00:00:47]In other word in this particular problem, if you apply pressure like that and geometry is like that and the the cons the restraint is given as indicated here, is there a plane of symmetry? And the answer is yes. In other words, all you need to do is half of this, half of it to the right, half of it to the left, and you have to model only half of it.

[00:01:11]Okay?

[00:01:13]So for me, I'm going to make that model exactly like it is without making sim taking symmetry into account. But then once I'm done, I'm going to come and cut it with the appropriate planes so that uh so that you get half of that moth.

[00:01:32]All right, folks. So that's the plan.

[00:01:36]Let me go ahead.

[00:01:39]I'm going to start with the part file and immediately I save it. So file, save management, save as.

[00:01:52]Uh let me see uh desktop new folder and I'm going to call it uh May 8 morning activity.

[00:02:12]Putting some structure into how you're doing things is very important because your exam your exam questions are going to be like that. You have to make sure you know where you put things and then upload at the end your uh part file and the analysis file for the case of a part. So say okay everything is going to go in there.

[00:02:37]All right my units are already in inches.

[00:02:41]And if you don't know how to do that, you go to tools options and then under uh uh parameters and measure units of inches and pounds and psi and things like that. So we say okay.

[00:02:55]All right. So uh my strategy is to make first of all this cross-section this section and then pattern. Okay. So let's go ahead and do that. So on that vertical plane I will sketch something that resembles that. So maybe uh there's zillions of ways of doing these things. You're on your own. You decide on your own strategy.

[00:03:22]Something like this.

[00:03:24]Maybe like that. We'll clear it up in a minute. Like so.

[00:03:35]Okay. And let's dimension these things.

[00:03:38]So, uh, this height is two 2 in.

[00:03:47]Not to worry. Don't let it scare you.

[00:03:53]Hide this thing and move it up here.

[00:03:56]Let's see. Now, this dimension is four.

[00:04:01]Not that one.

[00:04:05]This dimension is four.

[00:04:10]Okay, again not to worry. We don't we don't have any dimensions here. So I can write it there. Now let's see. Now this is two.

[00:04:24]This is two.

[00:04:29]Very good. And this is one.

[00:04:35]This is one.

[00:04:38]and uh view. Okay, very good. All right.

[00:04:43]So, uh I think we have the side view all sorted out. Oh, oh, this one is actually Sorry, this one is one 1.25. It's not two. So, let me go ahead and clean this 1.25. Because I was looking at this thing, it looks like it was shorter.

[00:04:59]Yeah, that looks good. Now, I'm going to place my circle somewhere here.

[00:05:06]And I'm going to put dimensions so that it's at the right location.

[00:05:11]So dimension from here to here that is one.

[00:05:19]And the dimension from here to uh there.

[00:05:31]It looks like it's 0.5.

[00:05:38]Okay. And the radius of that thing or the diameter is uh this diameter is point also 0.5 or radius is 0.25.

[00:05:50]Good. Exit pad it mirror extend and that width is two. So one inch in each direction.

[00:06:06]There we are.

[00:06:08]Okay. Then we want this middle section.

[00:06:11]What do I mean by the middle section?

[00:06:13]This section. So I have to make this.

[00:06:18]So on that vertical plane I will sketch.

[00:06:22]Uh okay. So maybe something like that.

[00:06:26]We'll clean it up.

[00:06:29]So, uh just a second. So, I uh yeah, sure. Uh let me actually cancel that.

[00:06:42]I draw something like this.

[00:06:46]The different ways of doing this thing.

[00:06:49]Uh what I'm going to do is one way of doing it. Okay. So, let me let me actually do the following. Let me draw a rectangle.

[00:06:58]Please note that there are many ways of doing these things. I'm going to make a rectangle like that. See why? Let's make sure that this this line this this point is coincident with that. So that control that and you make it coincident.

[00:07:20]Let's see what else. Uh we have the height dimension. So this height is 1.5 from down here all the way to the top is 1.5.

[00:07:30]So let me go in dimension from here to here is 1.5.

[00:07:40]All right.

[00:07:43]Oops.

[00:07:45]Good. Now what else do we have here? Uh we have uh uh that's pretty much it.

[00:07:55]Uh yeah, that's good. Exit pad it mirror extent in each direction by 7.7.

[00:08:09]Wait a minute. Uh by this much. Okay. So just a second. We have to find out what this what this length is. What is this length? This length is 0.5 and 0.5.

[00:08:20]Actually, this is one. Sorry, this is one. Uh, just be careful here. Wait a minute.

[00:08:27]Uh, so when you look at this 0.5 and this is 1.5.

[00:08:37]So from here to here.

[00:08:43]Ooh, we got a problem here.

[00:08:51]Notice that if this is 0.5 that distance is one. Oh yeah. One and five. So, so this is one. This is one. See this length is one. Okay, good. So, let's go back here. So, mirror extend in each direction five. And there we are. Okay.

[00:09:26]Now, you might say, wait a minute. Uh, what happened here? Is there a reason that there is no uh there is a there's a line there? So, we can go clean that up.

[00:09:36]So, let me go to that sketch. Let me go go to that sketch.

[00:09:42]Probably this line.

[00:09:47]Hang in there for a second.

[00:09:58]Okay. So, I don't like the way Let me uh let me do the following. Yeah.

[00:10:06]So, let me let me go to that uh normal view.

[00:10:13]Okay, let me do the following that coincidence. I'm going to delete and I'm going to drag this thing down.

[00:10:21]And now I'm going to make this point coincident with that line. Control this coincident.

[00:10:31]And then say okay and exit.

[00:10:35]There we are. Okay.

[00:10:38]You do it any way you want. Uh I just want to make sure that these dimensions are correct. From the top of this all the way to that bottom should be uh 1.5.

[00:10:50]Let's measure it. Measure from this line to that line.

[00:10:56]1.5. That looks good. Okay. Very good.

[00:11:00]So this is my part. It's all done. So, I'm going to save this thing. Click on the floppy. Everything is going to get saved in that same folder. Remember folder. Now, we're going to apply material to that. Uh, so where's apply material? Right there. Apply material on that part made of this field with default properties. Say okay. Let me save it.

[00:11:28]Good.

[00:11:29]Now because of symmetry I need to take only half of this. So I can go and split it. So I go to split. Remember the saw the saw you split it with that middle plane. And it doesn't matter which side you pick. Say I'll pick the other side.

[00:11:47]Doesn't matter there.

[00:11:50]Okay.

[00:11:52]Save it.

[00:11:54]And now we go to uh analysis and simulation. Generative structural analysis.

[00:12:02]Okay. Static analysis.

[00:12:05]Uh let me use it says parabolic. Uh see now use parabolic element. So double click on that. Use parabolic.

[00:12:15]And then it says let me change the rendering here.

[00:12:20]And it says use local mesh refinement around this hole half the size of the parabolic element. So you read the instruction that's what it say the parabolic size is.25 in. So I'm going to do local mesh refinement.

[00:12:38]So local mesh select that and.125 half of 0.25.

[00:12:48]Okay, very good. You can see that the these are almost half of that almost. So you can look at your mesh.

[00:13:01]There we are. There's a local mesh refinement here. You can see that.

[00:13:06]Deactivate your mesh and proceed.

[00:13:10]Okay. So remember inside of this uh circle this hole inside of that hole is clamped that we're told this is a surface slider. This is a roller. This is a plane of symmetry. So surface slider right there on that face. You say okay and there's a pressure of 100 PSI on that face. Please do not divide 100 by two. This is not a force, it's a pressure. So you go pressure on that face because it's pushing into it is 100.

[00:13:50]And there we are.

[00:13:53]Let's make sure that we save our uh analysis. So uh file, save management analysis, save as. In that folder, my 8 morning activity.

[00:14:08]In that folder, there's two files now.

[00:14:10]One of them is the part file. The other one is this. Assuming that we did not forget anything, we're going to run it.

[00:14:16]Compute. Say okay. And always pray.

[00:14:24]Done. Don't worry about this message.

[00:14:26]This is a warning message or it's a nuisance, but uh that's fine. Look at the deflection right there. And needless to say, you can animate that.

[00:14:38]Yeah, that's what happens. You can look at the stresses one meter stress. And let me uh uh let me uh uh change the rendering here to material shading. And you can see why I asked for a local mesh around this because there's a mus concentration there. You can see that.

[00:14:59]Now, a couple of things I should remind.

[00:15:02]If you don't like the color like this, you don't want it to be uh smooth like that, put the cursor there. Left double click. And when this thing opens up, says uh under more.

[00:15:17]No, sorry, not more. What we say?

[00:15:22]uh under uh on under this click on click on this three dots and say don't give me smooth uncheck that and notice that now the colors are distinct. Okay.

[00:15:40]All right. Good. If you want to look now we're not we are not checking the accuracy. I mean the biggest for this is 1,200 PSI uh for steel is nothing. The yield strength of steel is uh 30,000 PSI. This is 30 times almost 30 times smaller. Now if you want to look at the deflection click on this displacement and if you want to change the rendering you can do it from here you can do it from there. Double click on that and average ISO. There we are. If you want to see the elements as I said uh I don't know I didn't tell you what I did in the lecture. So click on this uh rendering the very last one question mark. Make sure this is checked and then you say okay. So that is pretty much it.

[00:16:36]This is activity number activity for the morning session and you can show it at to your ga at uh um where is that at uh 10:20. Now please note that we reserve the right to ask you question to make sure that you have done this thing because there's nothing that uh there's nothing to confirm that unless we ask you questions if needed. if needed.

[00:17:07]Okay.

[00:17:08]All right, folks. Thank you.