Structural analysis ,material properties


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Gaurav Kumar Thakur
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Hi
I have done component using CFRP prepreg now i wanted to FEA analysis for the same ,Vendor has provided the technical data sheet for the same but in that only three properties are given ,tensile modulus,Tensile strength ,and %elongation, can any body give suggestion what should be done??? 
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oekmont
oekmont
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For detailed FEM analysis for non trivial frp structures you will need a special frp FEM program. This is because of the non isothropic material characteristics and the fact that fibre directions will change when the planar cloth is applied to a non trivial mould. If you really want to go to the limits there is still no way around testing in reality. For simple forms and layups you can get good results with classical structual analysis or fem if you know what you are doing. If not, fem can mislead you because of it's blackbox characteristics.

Rosta Spicl
Rosta Spicl
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All today's FEM solvers can analyze multi layered shell structures. Generally no need special utilities. That's valid for structural analysis based on Hook's law, where the stress is related to Young's modulus. The FRP utilities, you have talking about, offers the special rutines for mesh and shell design which is much more user friendly. But, there is an issue, the FEM mesh generators doesn't solve the manufacturing requirements. It means the FEM net doesn't respect the fabric's wrap angle limit, darts etc. and takes a lot of work to do this right.


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