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  • Users: numbercraze
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  1. numbercraze

    Failure Theory

    Thanks SWC. Is that research paper available in the public domain. The idea is to conduct test and generate a failure envolope to compare it with the failure theories. The three criteria's which i am looking at is Hashin,Yamada-Sunn and Tsai-Wu. I know that Hashin and Yamada does not take...
  2. numbercraze

    Failure Theory

    The stacking sequence is [45,0,0,-45. This exercise is just to figure out which failure theories are conservative and which are not. Through the course of this exercise I found out that some use the ply surface stress/strain and some others use the mid plane values. I was wondering if you...
  3. numbercraze

    Failure Theory

    There are two different non-symmetric but balanced four ply laminates: one is a fabric laminate and the other is the Tape(UD)laminate. If i apply a load which is in the first quadrant the ply top and the bottom surface stress for the fabric is almost same and hence the average stress is similar...
  4. numbercraze

    Failure Theory

    Thanks SWC for your reply. But I am assuming that the allowable ply strain which is obtained from testing would be from the top surface. Correct me if I am wrong.
  5. numbercraze

    Failure Theory

    Hello All, In calculating the failure index using one of the failure theories is it an industry standard to use the strain or stress from the mid plane (average) of the ply rather than the strain or stress from the top surface of the ply. Also can you guys share your thought on the...
  6. numbercraze

    Honeycomb Modeling

    Hello All, I have analyzed sandwich panels before using PCOMP. Now I am thinking of modeling the core using 3D elements and the face sheet using shell elements. I understand that I would have to use multi point constraints for the transition in elements between the facesheet and the...
  7. numbercraze

    Career Advice

    Hello All, are there any stress engineers out there working in an aerospace industry. I was wondering how you guys have crafted your stress engineering career so far and what is the scope for it on a longer run? Thanks in advance.

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