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Hello guys, Please, could somebody help with a doubt? I don't understand exactly in what situation I really should use Von Mises as criterium of evaluation of stresses. I found some studies that used von mises because the material is ductile, but I don't understand the reason. I my mind I...

Hello guys, I would like to start a doctorade, but I am not sure about the theme. I work with finite element analysis (implicit and explicit) in componentes of transmission for vehicles, would be great if the theme follows this activities. Could you please help me with suggestions? I thought...

Hello everyone, I've performed a non-linear quasi-static with seven components. I applied a moment in the middle component that transfer the load to the others gears. The behavior of others component are according to the expectations. But when I assign 20% of scale in deformation (in order to...

Hello everyone! I'm performing a finite element analysis with a pair of gears and another component around this pair of gears. This system is named as "planetary gears". My model is simplified, just to see how will be the behavior of the system, I'm using the software Hypermesh with the solver...

Hello rb1957, Thank you for your answer. I agree with you about using the structure with all the respectivity density. But the reason to use the point of mass is to simplify the analysis. That's exactly what I've done. I've used a RBE3 linked from the inner surface to the CG with point of...

Hello everyone, I'm performing a FEA with gravity acceleration as load case and a point of mass concentration located at CG. I linked this point of mass with a rigid link in all inner surface of the componente. My doubt is: Is it correct link this point of mass only in inner surface? Or should...

Hello everyone, I've performed a FEA in a structure with small radius. The region with radius showed a high stress, higher than yield strenght of material, normally in this situation I just increase the value of radius in order to decrease the stress, above the yield stress then the part can be...

#rb1957 I agree with you, because this I'm thinking to use "Paired t Test" that work with the average of differences.

Hello guys, Thank you ever so much for all your answers. My test will not reach the failure, I just wanna validate the Neuber's rule, in other words, the test must give me the same value of the FEA, I don't need to kknow the probability of failure because I will work in linear region of the...

Hello everyone, I'm performing a FEA calculation in a cast iron component, in order to validate this calculation I've looking for the ideal number os samples to perform the test. I saw some standard for destructive testing but they are for standardized test bodies, someone know how to find this...

Thanks for all the input.

Hello guys, Recently I've tried to calculate a beam with varied section. In FEA it's really simple, but by hand it isn't. I've tried to use the Theory like below: This calculation works very well with linear beam, but when it's varied it doesn't work. Somebody could help me explaining how...

Thank you! I've found!

Thank you guys, for all answers.

Thanks for your answer rb1957, I really constrained all freedoms at one of the extreme. Do you know how could I improve this condition ir order to get a result more accurate? Henry.

Hello everyone, I'm performing some fatigue calculations and need some material properties as cyclic coefficient (K') and cyclic exponent (n') for cast iron, but this informations is really difficult to find at internet. Then, somebody can help me with the name of some book about materials with...

Hello everyone, I've performed an FEA and a hand calculation of a beam under simple load: FEA (solid): http://files.engineering.com/getfile.aspx?folder=1386a2e6-49e0-4fa8-a1a8-d266f2fcf2b9&file=Max.JPG Beam element...

Hello guys, How could I perform FEA with GAP on contact? I have a 3D model with 0.1mm of gap between the parts, but when I perform FEA it doesn't understand and parts enter another. See attachment: Thanks in advance...

Thank you for answers, Considering that this region has refined mesh, has complete assemply (including washer) and it's made out on steel (easy to find on the market), in practical I know this region will deform plastically, but I also know it will not break by fatigue or others way. I just...

Hello guys, How do you interpret this region? Is it reliable? I used non-linear contact between parts. I'm confused because this region is bigger than Yield Stress, but I know that this region will not break. My doubt isn't about stress at bolt, but the region that bolt abuts the part. See...