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  • Users: jbw9
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  1. jbw9

    natural freq. for beam with non-uniform cross-section

    Hi, I would like to model a cantilever beam in a program like MathCAD that I can modify quickly. It seems silly using FEA (Nastran) to model this type of system just to get the first few modes and mode shapes. I have been able to do this for a simple uniform beam using the flexural matrix and...
  2. jbw9

    membrane and bending stresses

    Does anyone know how to calculate the membrane, bending, and membrane plus bending stresses at each node with the information in the typical nastran output vectors. If so, please explain. Thanks in advance
  3. jbw9

    Stress linearization

    All, I am begining to learn the process of stress linearization (in general). Do y'all have any suggestions in terms of references I should start with? I will need to use this technique to perform some analyses on 3-D FEM(s). After reading some of the information on this forum, it seems the...

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