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Hi! I am trying to simulate, using hypermesh (optistruct), a 3 point bending test of a composite sandwich panel made of carbon fiber and aramid honeycomb. I have modelled the core using PSOLID property and MAT9ORT material and the skin where modelled using the tool "find faces", and then creating four CFK plies that form a laminate which is associated to the property PCOMPP that the skins have. I used MAT8 to define CFK plies. The Optistruct solver doesn't output any errors at all; however, when visualising the deformed shape, it represents an absolutely wrong and wierd shape for the sandwich panel where the supports are as shown in the attached picture (right and left side of the photo). I've tried to model it several times and even change some properties in case there was material failure in such points, but didn't work. I need help as soon as possible. Thank you!
We've followed the steps to apply a front impact force of 40g and 4g. Both times we got a stress singularity with an unusually high value of stress at a single element ( 5500 MPa and 505 MPa respectively) We have made sure that the mesh quality and geometry is up to the mark. PFA a screenshot of the 2D element stress contour of our model. Kindly offer some suggestion or guidelines to solve this problem at your earliest convenience.
Hello, I'm trying to set up a simple rocker model using 1D elements for the actual bell crank in Hypermesh and then applying the force at one end of the rocker and then attaching a spring CELAS to the other side, my issue is that for some reason the whole model is blowing up under the loadstep, I'm not sure how to use the DOF for the spring modeled in blue, but I tried to use the correct pin flags on the 1Ds for the rocker so it's constrained to in-plane. I attahed the .hm file as well, any help is appreciated, thanks. 1d rocker.hm