What is the Shore A hardness used for?
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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,
Postdoctoral position at University of Cambridge
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.
Details About "NLGEOM"Command in ANSYS
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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.
Fluid Flow through a Porous Sphere
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:
Simple beam bending FEM vs. theory comparison error
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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:
How can I find material properties of metallic glasses?
I am now going to model a sample with metallic glass (Cu-Zr-Ti) under stress and temperature loads. I wonder whether there is some existing database to find material properties, in particular, the creep properties with respect to temperature and stresses. Then I can use these data as input for a FE analysis.
Thank you very much!
how to simulate fibre direction?
Hi all
I am modeling a complex muscle with fibre reinforced. The fibre direction is not constant in this muscle. It is changing with the integration point in the model. Is there anyone who got idea on how to simulate the variable fibre directions in Abaqus? Can user subroutine ORIENT do this?
Many thanks,
Ben
Cardiff University
Electromechanical screw driven Tensile machine
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I would like to know what is the role of data sampling, data capture rate and bandwidth in case of electromechanical static tensile test. What are their optimum values for a static tensile test of metals according to ASTM standards.
We are deciding to buy Instron 5567 series for 50kN. But we are unable to decide whether that high data acquisition rate, bandwidth is required. Please suggest.