Why my result from stress analysis isn't symmetry?I am modeling a telescope support system. The result I got from the analysis always not symmetry, the difference is very small therefore I think the test setting shouldn't have any major problem.
The difference could be cause by the round off during the simulation, if I am right about it, is there anyway to improve the result?
I've been doing a lot of work with the Stress Analysis recently, and I have wondered if a certain feature exits. When I am interpreting the results of a simulation, I'll use the probe to find out the stress in certain areas. The problem is that I can't be certain that I've picked the point of highest stress in a certain area. I know that I can find the highest overall stress, but it's hit or miss finding the 'highest local stress' as I've come to call it. I need to be able to prove that a certain member's stress is below the allowable stress, and I can't be certain of the member's highest stress unless y'all know of some way.
I am running Autodesk Inventor Professional 2014, 64-bit.
I`m trying to determine will Inventor satisfy the needs that I`m having regarding simulation options. So I started with some elementary stuff.
If it is possible in stress analysis to manually select which degrees of freedom body has.
"Fixed constraint" block all 6 DOF and I would like to block only transitional DOF so that I keep rotational degrees of freedom?
I am trying to simulate the following:
I have an 8" OD/5.523" ID steel tube. A 5.5" OD/4.957"ID tube is placed inside. The 8" and 5.5" tubes are placed over a 4.9375"OD shaft. So basically you have a hollow shaft attached to a drive shaft, with a filler tube placed between them to fill the gap. Two 1-1/2" UNC bolts are placed in matching1.531" diameter holes in every component (thru bolted) with a nut. Tightening the nut will tend to flatten the pipes, taking up the clearance between then and creating a contact pressure on the drive shaft. I have having trouble getting all of the contacts correct since the components are not in contact at the beginning of the simulation due to the radial clearances.
Two axial bolt loads of 129,000 lbs will be placed on the tubes. I have used a sliding/no separation contact between the bolt and nut. Then I put a fixed constraint on the bottom face of the nut (not in contact with the tube) and put a 129,000 force on the top of each bolt head to simulate the axial load created by the bolt preload. What type of contact should I use between the tubes that have radial clearance?
I have attached the tubes and drive shaft. The 1-1/2" bolts and nuts (both heavy hex) were found in the library.
How to set up a symmetric stress analysis?
I read about using symmetric analysis on a symmetric assembly, but no description of how it is done.
I am trying to properly stress test a steel aircraft fuselage. I can easily model the estimated weight of the pilot, copilot, etc as loads on the airframe. However, when it comes to simulating a high-G situation, (a load factor of around 7.5 times the force of gravity), I am not sure what to do. On one hand, I can simply multiply the loads on the airframe by the load factor and see if the frame can take it. In most cases, it performs very poorly, (safety factor less than 1). However, if I model all the loads under normal conditions, (normal pilot weight, etc.), then add a gravity load equal to 7.5 G, the airframe performs well. Yet I am not sure if the loads on the airframe, (such as pilot weight), are being adjusted along with the increased gravitational load.
My question is, what is the best way to accurately simulate real world loading for high-G situations?
I am trying to determine how to properley constrain the assembly below, so that the compression of the rubber gasket will be properly indicated.
Currently I am seeing the deflection of the shelf in the downward direction, but I do not see any indication of stress in the gasket behind.Currently the gasket is "bonded" to the steel tube the screws are bonded to the shelf bracket and the steel tube.
I put in "work axis" at the center line of the shelf bracket and the CL of the gasket, but I can't find a way to constrain to a work axis.The file is too large to upload here...
inventor 2012
64 bit machine
12gig ram
and it says I don't have enough memory! How can this be? Its not that complicated of an assembly. I have done bigger. I excluded all the part I'm not using and they are all basic plate and tube parts. There are less than 20 parts in the assembly.
I have used a few times 'Stress analysis' before. Today I discovered it is disabled. I applied a software update (SP1, build 222), after which I could run a Stress analysis again. However, Inventor crashed soon, and after restarting it, Stress analysis is disabled again. In 'Add-In Manager' the 'Simulation: Stress analysis' is shown as 'Automatic/Loaded'.
UPDATE: I have unchecked the 'Load Automatically' option for this module, quit Inventor, started it again, loaded the module and now it seems to work. I don't know yet for how long...
UPDATE2: well I could start a Stress analysis, but everything is disabled there, I can not create a simulation for example.
I have just installed Inventor 2012 on a clients machine and the stress analysis tab is missing.
View 2 Replies View RelatedI work for a tank building company and we are starting to use Inventor for stress analysis. We have a tank that we are designing that has a tank inside of another tank. The internal tank will be holding product while the outside tank is there to prevent product leakage in the event that the internal tank has a leak. There is piping that is welded to both the inside tank and the outside tank.
So here's my question: We know the radial deflection of the piping on the internal tank due to pressure, but we want to know what the stress is going to be on the external tank shell. Is there a way that I can input the amount of deflection and so that inventor will calculate the stresses involved?
I'm a student working on a team project to build a vehicle and we're required to do a stress analysis to make sure if the vehicle (chassis, supports, etc) can withstand the weight of the driver, etc.
The problem is that the analysis that I did doesn't seem to make any sense at all, like there was no stress between the joints, the frame bent when the applied force was only 5 kg...
The metal used is mild, steel.
I am using Inventor 2009 professional and I have to run a stress analysis on a beam. I put the constraints and the forces I need and when I hit the calculate button, the results so up, but when I click on the results, nothing appears. I need to run this calculation and do not want to resort to hand calculations.
View 9 Replies View RelatedI'm trying to run a simulation on a part to test it's resistance to explosive forces and pressures. All the tutorials I find on stress analysis seem to be grader toward mechanical parts or tables.
View 9 Replies View RelatedI'm trying to create a report on a stress analysis I've made. Reading the report I don't find any result on safetyfactor. When I was browsing the forum I found a thread concerning safety factor and a report file attached. My report is missing some of the information that I found in this attached report (such as "result summary".
View 2 Replies View RelatedI'm performing a static stress analysis on a benchframe. The benchframe is imported out of a STP file and I assume that's where the problems begin.
When I start the simulation, everything goes well. When I see the results, almost the whole part is blue, and only a really small part in a corner is shown red, with extremely high stresses.
The corner is actually not what I wanted to test, but it is messing up the other visible results because now I have to place probes all over the part to see the stresses (because the colors are calibrated with the high peak).
I have tried working with local mesh control and convergences, but I can't control the results in the small corner. I also tried rebuilding surfaces and adding fillets.
Is it possible to set a maximum stress, so that the other colors are visible in the important areas. It is not possible to exclude the corner from the simulation because it's part of a substantial part.
I am having problems creating a Stress Analysis Report from the Dynamic Simulation on this assembly.
My goal is to show the cam shaft rotating at 3500 rpm, and the stress it creates. I am looking to show the stress concentrations at the fasteners as well as the rotating components, the cam will have a torque of 15 ft lb, with a counter torque of the compressor equal to that.
I have been working through Wasim Younis' Book for Inventor 2014, but seem to be coming up short in its application.
I am using Inventor Professional 2014.
Autodesk Inventor 2013 Certified Professional
Autodesk Product Design Suite, Ultimate 2013
How to make stress analysis from wood?
Does not allow to choose a wood? I have problem with material.
I am having problems with 2013 and trying to access the Stress analysis, when going into environments the tab is consistently greyed out. I made a very simple model and pasted the snips below.
-Environments Tab
-Add In manager.
I currently use Factory Design Suite Premium 2012/Inventor 2012 (64-bit, Factory Premium) but notice there is no stress analysis option in the environments tab...shouldn't it be there or is an additional purchase required?
View 4 Replies View RelatedI have managed to perform a stress analysis on a part (which only 1/4 of it is shown due to its symmetry). Upon running the simulation and displaying the results for Von Mises Stress, all the part has been fully colored in blue, and there are no signs of any red areas. However, the bar line on the left still indicates that there are areas which are highly stressed. I'm now confused weather if there any areas of the part are exhbiting this type of stress, and if yes, how can I locate the most highly stressed parts?
View 7 Replies View RelatedI have a question regarding the Stress Analysis in Inventor. I have got a frame generated and I want to get rid of all radiuses on my box sections. All box sections are frame generated so I can't simply go and exclude the radius from my stress analysis. Is there any way to exclude those box section radiuses from my stress analysis simulation so I have proper contact between each part?
View 8 Replies View RelatedI am trying to run an FEA in Inventor 2014's built-in stress analysis tool. After assigning materials, fixing the correct geometry, applying loads, and detecting contacts. Originally, I had a problem with a mesh (mesh encountered unidentified problem, but it pointed to certain geometry in the model, which I then removed). When I was finally able to run the simulation, I had an error stop the simulation, saying "element material is not defined". All models in the assembly have materials assigned. How can I pinpoint which element doesn't have a material assigned? How do I assign a material to a specific element? Unfortunately, I can't attach my assembly file.
View 5 Replies View RelatedI 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.
View 1 Replies View RelatedBasic understandable breakdown of the meanings of the 3 constraint options when running a stress analysis - pin, frictionless and fixed ?
It is difficult to tell if I am using the correct ones(s) and Inventor does not give a detailed enough description of how to apply them and which ones to use. I have attached an image showing what I have done so far, the constraints in the drawings are 1 pin constraint to the bolt (only fix axial direction checked) and 1 fixed constraint on the I-beam surface.
My design consists of two steel rails that are welded together on top of a guardrail system. To allow the weld to be added between the steel rails I have converted my assembly file to a weldment.
My question is now I have this converted assembly with it's weld in the design can this still be used to perform stress analysis on ? I am not sure the need for assembly to be converted to allow a weld to be added.
Does inventor take into account threads? I want to do a pull test on BSP thread connection but the surfaces between the threads are shown as "bonded" so I gues that the stress analysis will treat it as one part glued together.
View 1 Replies View RelatedI am trying to create a report in .RTF and keep getting a page full of code. I am pretty sure it is down to the fact my company insists on running an antique version of MS Word. I have attached the file.
View 1 Replies View RelatedMy Stress analysis will run and process after i hit simulate but did not return result(Results tree is empty)
I'm running autodesk inventor pro 2013.
I have an assignment in school in which we are going to calculate the number of needed rivets and their dimensions to join two pieces of aluminum with the dimensions 5x50x200mm together.
I've created the sheet metal and imported two of them into an assembly along with 8 rivets from the content center with the appropiete dimensions. In comes my problem. I planned on running a stress analysis and pasting the pictures of the results in my report. However, I have a feeling that the stress analysis tool isn't working as it should.
No matter what force I'm applying to the sheet metals, and no matter what material I assign to the different parts, including the rivets, the results, the deformation and force applied to the rivets, are roughly the same.
I've applied a force of 12700N to the two short sides of the sheet metals:
The two sheet metals are also fixed on the opposite side of the forces:
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Is it possible to calculate the deflection a steel block will get, just form it one weight. Just use standard steel material, it is only supported at the end.
View 4 Replies View Related