AutoCAD Inventor :: How To Measure Angular Displacement On FEA Simulation
May 13, 2013
What is the best way to measure angular displacement on a FEA simulation?
A simple example is described here: The screen shot shows a long rigid body (left) mounted on a bracket (far right). The legs of the bracket are fixed on the right. There is a down force on the left. The goal is to measure vertical displacement on the left. All of the vertical displacement comes from flexing at the bracket, so this can be considered an angular displacement.
Is there a way to measure this vertical displacement without the long rigid body or it's mesh elements?
Or is there a way to turn off the mesh elements on the rigid body? I want to eliminate the unnecessary FEA computations to speedup the simulations.
We are projecting a support for one mirror of our Infrared beam line. The support is a block with a rotational weak link and that needs to be rotated about +/- 1°. I would like to know a way to insert this angular displacement and get the stress in the weak link area. I don't have the moment loads and components.
I have an assembly with a FEA simulation result. I can run a report and get the reaction forces and moments at each constraint. I would like to run a new simulation with different constraints and use the reaction results from the first simulation as loads in the second one.
Currently I do this by running a report on the 1st simulation to get a table of the reaction results. I then manually add those forces to the 2nd simulation. This takes time to type and the forces must be edited each time I re-run the 1st simulation.
Is there a way to use parameters to automate this?
Is it possible to have text below the angular dimension line like you can with most other dimensions. The attached pic shows my 10 dimension with the type. Under the line and my 30 dimension with type. Under the line but the type. Under the 30 is just a text box I eye-balled in to place it is not attached to the dimension. I looked in the styles editor but could not find the setup option I need.
I am trying to put an angular dimension from a hole to a slot positioned planes 90degrees to each other. How can I achieve this? Typically, it depends on how it is put into the ipt file but I didn't know how else to put the slot in therefore only a point was put in at that angle.
I want to use the custom unfolding rules using Bend Compensation with an angular reference to the bending angle.
I have an Excel sheet where I have determined the bend allowance, the set back and from that, the bend compensation. When I compare these values to the values I get when using a K-factor linear unfolding method in Inventor, I get almost exactly the same results.
Tells me the formulas are working. So I implement the formulas in the custom equations. Exactly the same as in the Excel sheet. 10 degrees angle, great results! Yeah! 45 degrees, great results! More yeah! 90 Degrees, still going strong, I think I might make it!
100 degrees.... Fail! Every time an angle goes over 90 degrees, the result is crap.
I have been struggling with this all day long!! So in the end I completely erased the equations from the Inventor custom equations.I just say: Compensation is 1 mm. For all angles. This should no room for interpretation.
Again I try. I have a sheet metal part with two legs. A 100mm leg and a 50mm leg. Flat pattern should always be 151mm. Period.
Again, under 90 degrees and on 90 degrees, I get nice flat patterns. Above 90 degrees, it fails again.
Am I completely overlooking something obvious?? Or is Inventor really bugging on this?
I was wondering, i m doing stress analysis in autodesk inventor on my parts and when i check displacement results and display them in colours with legend it says that there is max 0.01024 mm displacement but on the screen where i see actual part it looks like it moved for 6mm from original location.
I've created a successful FEA simulation in Inventor 2014 and obtained results. But I want to see the highest stress in a defined area that is smaller than the entire part (I have some stress concentrations that are throwing off my 'max'). Is there a way to probe an area instead of just a point? I'm tired of creating a dozen probes to find the 'local max'.
I'm developing a program which runs several simulations and obtains the results automatically.
I'm using the dynamic simulation API created in Inventor 2013. For that I use the GetResultValues(ByRef values() as Double) method of the class DSResult.
I used the method inside the VBA of inventor and worked well. But when I wrote the program in Visual Basic Express 2010, the method doesn't return anything.
I share an excerpt of the
Dim odoc As AssemblyDocument odoc=invApp.Documents.Open(testPath, True) Dim dsman As Inventor.SimulationManager = odoc.ComponentDefinition.SimulationManager Dim dssim As Inventor.DynamicSimulation = dsman.DynamicSimulations.Item(1) Dim oJoints As Inventor.DSJoints = dssim.DSJoints oJoint = oJoints.Item(1)
[code]....
The method GetResultValues(values) should modify 'values' to a time,value vector.
It works well inside Inventor, but doesn't in the program in VB, although it runs the simulations and does everything else right.
when in simulation, if you suppress a feature is it totally taken out of the simulations workings?
I.e. if I was working on a project like some weighing scales and I had a load of objects on the scales and I then suppressed some of the objects, will the scales rise up a little to counteract the reduced weight?
Is this type of gravity experiment possible with dynamic simulation?
[URL].........
I made the cone ramp and double cone but the cone either goes the wrong way or only moves a few inches in the correct direction and then gets stuck. I’m using 3D Contact Joints and Spatial Joints and Gravity Force.
i'm developing a hexapod robot and i want to simulate the motion of the robot's leg. The mechanical of robot's leg contain a servo motor that variate your angle between 0 to 330 degre. How can i delimite the angle of servo's rotation?
Other questions, is about the fixation with bolts. How can i do for the motion simulation respect the connection of the bolt? when i do a dynamical simulation the parts that contain bolts don't stay joints, i have to do a rule of fixation with constrains?
I'm designing multiple elements for a vehicle. I need to evaluate multiple dynamic results of multiple possible designs. All the design is parametric so it modifies quickly but I can't find a way to run the dynamic simulation multiple times automatically and get the results from the output grapher for each simulation.
I am trying to do it via API but can't find the class of the dynamic simulation environment in the Object Model Chart to program it via .NET.
I have a very simple part I am trying to check using FEA; however when I get into the Simulation environment and click 'New Simulation' from Ribbon nothing happens.
The part in question is just a simple cylinder (I'm verifying what would be the best meshing spec to use in a larger assembly).
I am playing with traces in dynamic simulation and in the output grapher i get values for position like:
P P(x) P(y) P(z)
and in the graph i get some values of the position but i am unsure on where the datum is at this point. I would of thought that the datum would be where the trace is attached? Where the datum is based and is it possible to set a relative datum to when the trace is set?
I'm running several dynamic simulations via the API. Then I am getting the results to write in a text file. I want to know the force in a joint so I get the vector of values via
Dim oResults As DSResults Dim oResult As DSResult Dim value() as Double Call oResult.GetResultValues(value())
this vector is a time, force vector but when I verify mi data against the Output Graphe all the decimal points from the force information are gone.
Example:
In Output Grapher
Time (s)Force(N) 0.0118955.66 0.0219500.88
In the vector from API
0.01 1895566 0.02 1950088
is there a way to correct this? I'm getting many force and movement info, so I don't know which ones are reliable.
I have a question regarding simulations in Autodesk Inventor.
For example I have such part:
It is a plug made out of brass. I want to test if it will be able to withstand specified pressure. So I set up where is it constrained - on thread.
And set up pressure from inside on the cap to be 16 bar (1,6 MPa). And also assign materials. And there goes simulation . Everything seems alright. I want to run little bit different analysis. When pressure would be variable.
For example I will have pressure going from 12 bar to 16 bar, and such simulation will be running for quiet long time (as an example pressure will be 12 then raises to 16 then goes to 12 again and then raises to 16 again). I want to know after what time will this plug fail and will be destroyed? I mean i want to know when METAL will get tired and will be destroyed? I was just wondering if such a simulation is possible to be made in Autodesk Inventor?
If you can imagine a cylinder sliding on curve joint. Let’s say the curve is in the XY plane. In the output grapher it is possible to display the force as the cylinder slides around the curve. However if I understand it correctly the magnitude of the force will be in the direction perpendicular to the point of contact between the cylinder and the curve? In which case is it possible to actually find out the individual X and Y components of the force? That is to say the magnitude of the force in the X or Y plane of the curve?
Let me preface this by saying that we work mostly in the metal fabrication industry dealing with the elastic deformation of plastic materials that are isotropic so this question is a bit above my pay grade here.
Is it possible to simulate the stresses in a piece of glass in a simple beam scenario in Inventor (1/2" x 48" x 130" Tempered Glass)? I have a client that wants me to design a conference room table for him but I am highly uneducated about glass.
Is it possible to simulate? If not, is it possible to "fake" it and get semi-reliable results? We're at the conceptual stage here and we're curious which of our designs have a greater possibility of surviving the design validation process (which will include a glass expert at some point).
Every now and then, but recently more then I want, I get a blue screen while doing a stress analysis.
I have a pretty simple assembly with just 2 parts in it. One of these parts is built as a multibody part. It can be that the blue screens started to occur after I made a multibody design, however I am not sure about that. I downloaded and installed Inventor R13.
is their a possibility to applay stress like dynamic i have a shaft that has a pully on it , its conectet on an old way
not with a tight fit so it shrinks on it but it works wit a small cut in the shaft where its bolted with just a tiny metal plate.
at this place will be a stress concentration and i wanne see how the noth effect is when their is a dynamic load on it cause if i put a static load on it i know the shaft can handel it but i real life it has broken couple of times so this is what i want to investigate.
why there is huge difference in Dynamic Simulation results when you use two different input methods? I used input grapher and in linear ramp, I entered input (time/ distance) manually for 6 points and ran simulation. Then I used Spline and used a text file to enter SAME data and it gave me at least 10 times different results. Can't figure out why this difference. This changes my entire design.
I have a dynamic simulation which seems to have corrupted itself. I have a number of Revolution joints which are torsional springs. I’ve enabled joint torque and set a spring stiffness and a free position (+15 deg). Then on the ‘initial condition’ page I’ve set Max (+45 deg) and Min(-15 deg) Bounds on rotation angle and set a stiffness 10x the spring stiffness to simulate the end stops of my torsional spring. The initial position is +12 deg. This was working just fine but since I’ve added a couple more parts (nowhere near these springs) I constantly get the message “The parameter xxx value is out of bounds”. Where xxx is the ‘Initial position’ of the joint. If I edit the joint and untick the Bounds section the message goes away but if I tick it (which I need for my simulation) I get the error message as soon as I pick OK. The position is NOT out of bounds?
