I would be gratefull in advance if you send me an illustrative examples about how to find out the natural frequencies and mode shape of rotor-bearing system by using abaqus.
The Shore A and D hardness tests are widely used by the rubber industry. However, I'm not sure what practical use these numbers can be put to during design. My current feeling is that Shore hardness numbers can at best give you a feel for the texture of the rubber - a Shore A value of 5 = gummy bear texture, Shore A = 40 implies erasure texture etc.
Can someone explain how Shore hardness values can be used in the design of mechanical components made of rubber?
Thanks in advance,
A postdoctoral research associate position is available starting October 1st at the Department of Engineering in Cambridge. The successful candidate will work on a project on parallel numerical methods for fluid-structure interaction with application to life sciences.
I am developing an FEA code for a viscoelastic contact analysis. Right now the formulation is assuming small deformations. After deformation I am getting the volume of the body to be less than the original. I want to preserve the volume. ANSYS gives exact results as my code by carrying a normal contact analysis.
Without doing a serious CFD project does anyone know of a back of the envelope calculation or model that will let me show the following. Given:
I am having some trouble getting accurate values for max. stress and max. deflection for an FEM model of a simply supported I-beam in bending. I am using I-DEAS 12 NX to solve the model. I'm pretty new to finite element analysis as a whole, but I know that getting any more
than 10% error (relative to Euler beam theory) in max deflection or stress for a 60x10x8 in. should not happen. Strangely enough, using the same boundary conditions and meshing techniques for a 60x10x8 in. rectangular solid, I find the results I was expecting. Here are some more details:
