Transcript
00:02
Simulation results tools.
00:05
In this video, we will review simulation results, we will interrogate simulation results and we'll use the simulation result tools.
00:13
In Fusion 360, we want to carry on with our motorcycle rear set.
00:18
Notice that as the simulations are solved we begin by seeing results details on the right hand side.
00:24
This dialogue will tell us the minimum safety factor,
00:27
and there are some targets by default, which are set as three with a lower limit and six is the upper limit.
00:33
There are also some recommendations.
00:35
Things like changing the material or modifying the shape.
00:38
We can also take a look at using the generative design workspace to create alternatives based on material shape and performance.
00:46
From here I'm going to close the results details and I want to interrogate these simulation results myself.
00:52
At this point what we're doing is we're looking at the static stress study for our frame mount only.
00:58
If we want to take a look at the other options we need to activate them and review their results.
01:03
You'll notice that the bolted bracket and frame is showing a much lower safety factor,
01:10
and if we interrogate this, we're likely to see that the safety factor is an issue right around the definition of our bolts.
01:17
Let's hide the bolted connections and let's take a look.
01:20
Because the bolted connections are based on fixing an edge,
01:24
we're always going to see these stress risers, especially in a design that has such a thin section because we're using a flat head screw.
01:31
Let's take a look at the bracket and frame mount where we had a bonded connection.
01:36
You can see that the minimum safety factor is closer to one, which still means that we would expect to have permanent deformation in this design,
01:44
but it is much higher than we saw in the bolted connection.
01:48
If we're having trouble figuring out where those min and max values are,
01:51
we can use the color bar to remove some of the higher factor safety areas and focus solely on these red areas.
01:60
When we do this, you'll note that very few areas are red and this is showing a high stress concentration solely in this sharp corner.
02:08
Because of that, I would take a look at this design and say that we could increase the corner here.
02:15
Maybe have a finer mesh element size here and determine whether or not that's actually a problem.
02:22
Just based on initial reaction, I would say that that stress concentration there could potentially cause a crack in the bracket,
02:30
but knowing that the bracket itself is going to be held together with the pin and either some hardware whether it's a nut or a cotter pin,
02:38
I would know that this portion of the bracket is not going to be allowed to separate,
02:43
but over repeated loading that could be a potential issue that we would need to explore.
02:48
Let's go ahead and take the color bar all the way back up and go back to home view.
02:53
We have an option called compare that allows us to pick multiple simulation models and we can pair them against each other.
03:01
You can see right now on the right hand side, we're looking at the bolted bracket and on the left hand side, we're looking at the bonded bracket.
03:08
We can use these to navigate between different simulation studies.
03:12
If your simulation study has multiple load cases, you can use the load case dropdown to identify those.
03:19
From here, I'm going to navigate through to take a look at some of the other areas such as stress concentration.
03:25
I'm going to finish compare and I want to focus my attention solely on my frame mount only.
03:31
From here, if I'm looking at stress we can see areas of high stress concentration are directly located around the bolt hole.
03:39
Once again, these areas may or may not be a potential issue depending on our definition of the study and how they're actually going to be connected.
03:48
If we take a look at the first principal stress,
03:52
and once again, first principle is going to be showing us tension in the model and we identify these areas.
03:57
You can see that we've got some tension in the model around this lower boss,
04:01
means that we could likely put a small fillet there to help transition that stress.
04:06
You can also see that it's located on this back edge which makes sense based on the way the bracket is deforming.
04:12
If we go to third principle, then we're going to be taking a look at the compression.
04:16
The compression is happening once again as we investigate this model around this area where it's beginning to bend based on that remote force.
04:25
We're also seeing that in the upper portion of the boss again it's opposite, the lower portion where we were looking at tension in the model.
04:33
And lastly again, when we're looking at the von Mises stress, we're looking at the equivalent stress in any of the mesh elements.
04:41
If we wish, we could turn mesh elements back on and we can identify those.
04:45
We can even go into our legend options and change the color transition to banded rather than smooth.
04:52
And we can modify things like the legend size.
04:56
When we're looking at banded transitions, this might give us a better idea as to the affected areas of the different stress concentrations.
05:04
When we're looking at the smooth distribution, oftentimes it can be harder to tell how much of the design is actually affected.
05:11
For this example, I'm going to go back to smooth and I want to take a look at the deformation by changing my stress plot to displacement.
05:19
We can see here that the max displacement is 0.143 mm and we can see the area in which it's deforming.
05:27
It's important to keep these results in mind.
05:29
And if we're going to make any changes to our bracket we would do this by cloning the simulation model.
05:34
That way we could preserve these original results.
05:38
There are also a number of simulation tools that we can use and for this we'll go back to our stress plot.
05:45
Under the Inspect dropdown, we can take a look at surface probes, point probes, reaction forces and creating slice planes.
05:54
First let's take a look at creating surface probes.
05:56
You'll notice that the model goes back to an undeformed model and we can hover over the model at any point.
06:03
And in this case since we're looking at von Mises stress, what we're looking at is that equivalent stress.
06:09
If we click, we can add these point probes in various areas.
06:13
And once we say ok, those point probes are now displayed.
06:16
They can be moved around and we can identify where they're pointing.
06:20
If we instead wanted to create a point probe,
06:23
a point probe allows us to manipulate the position on the model after it has been placed and we can use specific X, Y and Z coordinates.
06:32
It's also important to note that after a point probe is created, the X, Y and Z location will be displayed inside of that probe dialogue.
06:40
If we want to take a look at reactions, we can identify the reaction forces and by selecting specific areas, those reaction forces will be shown.
06:50
For example if we select edges but in our specific case we don't have any reaction forces because we're looking at a single body.
06:59
If we instead go back to the bolted bracket and we take a look at reaction forces,
07:04
we can identify specific areas of the design that would show us those reactions.
07:09
We also have a contact pressure and reaction force plot.
07:13
We can see here exactly where those forces are located.
07:17
Let's navigate back to our frame mount only and let's take a look at the last option we have called slice plane.
07:23
The slice plane will allow us to pick a plane or a planar face,
07:28
and we can drag it through the model giving us further identification of the stress is internal to the body.
07:34
We can determine whether or not we want to display the mesh, whether or not we want to clip the entire model and if we want to show the force vectors.
07:43
Notice that the force vectors can be constant or proportional to the loading.
07:47
And we can also increase or decrease the glyph size.
07:50
As we rotate this around, we can see the glyph displayed on screen in the direction the forces are going.
07:57
If we turn back on the clipping plane and we say Ok we can now see the slice under results.
08:04
We can expand this and we can hide the slice plane.
08:07
We can hide and show min and max, we can hide all probes and we can focus our attention just on the section view.
08:15
This is handy because it tells us the direction of these forces,
08:19
and if we change the plot for example the safety factor, you can see that the slice plane is still showing we have displacement.
08:26
We can take a look at our stress and strain.
08:28
We can also look at those reaction forces.
08:32
So all of these different results are extremely important for us to identify what's happening with our design,
08:38
and make intelligent decisions on the design changes that could potentially improve the functionality of the design.
08:45
At this point, let's make sure that we do save this design before we move on to the next step.
00:02
Simulation results tools.
00:05
In this video, we will review simulation results, we will interrogate simulation results and we'll use the simulation result tools.
00:13
In Fusion 360, we want to carry on with our motorcycle rear set.
00:18
Notice that as the simulations are solved we begin by seeing results details on the right hand side.
00:24
This dialogue will tell us the minimum safety factor,
00:27
and there are some targets by default, which are set as three with a lower limit and six is the upper limit.
00:33
There are also some recommendations.
00:35
Things like changing the material or modifying the shape.
00:38
We can also take a look at using the generative design workspace to create alternatives based on material shape and performance.
00:46
From here I'm going to close the results details and I want to interrogate these simulation results myself.
00:52
At this point what we're doing is we're looking at the static stress study for our frame mount only.
00:58
If we want to take a look at the other options we need to activate them and review their results.
01:03
You'll notice that the bolted bracket and frame is showing a much lower safety factor,
01:10
and if we interrogate this, we're likely to see that the safety factor is an issue right around the definition of our bolts.
01:17
Let's hide the bolted connections and let's take a look.
01:20
Because the bolted connections are based on fixing an edge,
01:24
we're always going to see these stress risers, especially in a design that has such a thin section because we're using a flat head screw.
01:31
Let's take a look at the bracket and frame mount where we had a bonded connection.
01:36
You can see that the minimum safety factor is closer to one, which still means that we would expect to have permanent deformation in this design,
01:44
but it is much higher than we saw in the bolted connection.
01:48
If we're having trouble figuring out where those min and max values are,
01:51
we can use the color bar to remove some of the higher factor safety areas and focus solely on these red areas.
01:60
When we do this, you'll note that very few areas are red and this is showing a high stress concentration solely in this sharp corner.
02:08
Because of that, I would take a look at this design and say that we could increase the corner here.
02:15
Maybe have a finer mesh element size here and determine whether or not that's actually a problem.
02:22
Just based on initial reaction, I would say that that stress concentration there could potentially cause a crack in the bracket,
02:30
but knowing that the bracket itself is going to be held together with the pin and either some hardware whether it's a nut or a cotter pin,
02:38
I would know that this portion of the bracket is not going to be allowed to separate,
02:43
but over repeated loading that could be a potential issue that we would need to explore.
02:48
Let's go ahead and take the color bar all the way back up and go back to home view.
02:53
We have an option called compare that allows us to pick multiple simulation models and we can pair them against each other.
03:01
You can see right now on the right hand side, we're looking at the bolted bracket and on the left hand side, we're looking at the bonded bracket.
03:08
We can use these to navigate between different simulation studies.
03:12
If your simulation study has multiple load cases, you can use the load case dropdown to identify those.
03:19
From here, I'm going to navigate through to take a look at some of the other areas such as stress concentration.
03:25
I'm going to finish compare and I want to focus my attention solely on my frame mount only.
03:31
From here, if I'm looking at stress we can see areas of high stress concentration are directly located around the bolt hole.
03:39
Once again, these areas may or may not be a potential issue depending on our definition of the study and how they're actually going to be connected.
03:48
If we take a look at the first principal stress,
03:52
and once again, first principle is going to be showing us tension in the model and we identify these areas.
03:57
You can see that we've got some tension in the model around this lower boss,
04:01
means that we could likely put a small fillet there to help transition that stress.
04:06
You can also see that it's located on this back edge which makes sense based on the way the bracket is deforming.
04:12
If we go to third principle, then we're going to be taking a look at the compression.
04:16
The compression is happening once again as we investigate this model around this area where it's beginning to bend based on that remote force.
04:25
We're also seeing that in the upper portion of the boss again it's opposite, the lower portion where we were looking at tension in the model.
04:33
And lastly again, when we're looking at the von Mises stress, we're looking at the equivalent stress in any of the mesh elements.
04:41
If we wish, we could turn mesh elements back on and we can identify those.
04:45
We can even go into our legend options and change the color transition to banded rather than smooth.
04:52
And we can modify things like the legend size.
04:56
When we're looking at banded transitions, this might give us a better idea as to the affected areas of the different stress concentrations.
05:04
When we're looking at the smooth distribution, oftentimes it can be harder to tell how much of the design is actually affected.
05:11
For this example, I'm going to go back to smooth and I want to take a look at the deformation by changing my stress plot to displacement.
05:19
We can see here that the max displacement is 0.143 mm and we can see the area in which it's deforming.
05:27
It's important to keep these results in mind.
05:29
And if we're going to make any changes to our bracket we would do this by cloning the simulation model.
05:34
That way we could preserve these original results.
05:38
There are also a number of simulation tools that we can use and for this we'll go back to our stress plot.
05:45
Under the Inspect dropdown, we can take a look at surface probes, point probes, reaction forces and creating slice planes.
05:54
First let's take a look at creating surface probes.
05:56
You'll notice that the model goes back to an undeformed model and we can hover over the model at any point.
06:03
And in this case since we're looking at von Mises stress, what we're looking at is that equivalent stress.
06:09
If we click, we can add these point probes in various areas.
06:13
And once we say ok, those point probes are now displayed.
06:16
They can be moved around and we can identify where they're pointing.
06:20
If we instead wanted to create a point probe,
06:23
a point probe allows us to manipulate the position on the model after it has been placed and we can use specific X, Y and Z coordinates.
06:32
It's also important to note that after a point probe is created, the X, Y and Z location will be displayed inside of that probe dialogue.
06:40
If we want to take a look at reactions, we can identify the reaction forces and by selecting specific areas, those reaction forces will be shown.
06:50
For example if we select edges but in our specific case we don't have any reaction forces because we're looking at a single body.
06:59
If we instead go back to the bolted bracket and we take a look at reaction forces,
07:04
we can identify specific areas of the design that would show us those reactions.
07:09
We also have a contact pressure and reaction force plot.
07:13
We can see here exactly where those forces are located.
07:17
Let's navigate back to our frame mount only and let's take a look at the last option we have called slice plane.
07:23
The slice plane will allow us to pick a plane or a planar face,
07:28
and we can drag it through the model giving us further identification of the stress is internal to the body.
07:34
We can determine whether or not we want to display the mesh, whether or not we want to clip the entire model and if we want to show the force vectors.
07:43
Notice that the force vectors can be constant or proportional to the loading.
07:47
And we can also increase or decrease the glyph size.
07:50
As we rotate this around, we can see the glyph displayed on screen in the direction the forces are going.
07:57
If we turn back on the clipping plane and we say Ok we can now see the slice under results.
08:04
We can expand this and we can hide the slice plane.
08:07
We can hide and show min and max, we can hide all probes and we can focus our attention just on the section view.
08:15
This is handy because it tells us the direction of these forces,
08:19
and if we change the plot for example the safety factor, you can see that the slice plane is still showing we have displacement.
08:26
We can take a look at our stress and strain.
08:28
We can also look at those reaction forces.
08:32
So all of these different results are extremely important for us to identify what's happening with our design,
08:38
and make intelligent decisions on the design changes that could potentially improve the functionality of the design.
08:45
At this point, let's make sure that we do save this design before we move on to the next step.
Step-by-step guide
