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  1. upzheng

    Explain high stress spot in bolt joint with femap/NX Nastran

    I have a 3 pieces assembly jointed by bolt. I use RB2 in Femap/Nx Nastran to simulate the bolt. Two side parts are fixed. One part is under the upper right load from the two free hole. After run the analysis, I get results shown in attached picture. I can see the bolt squeezing the side...
  2. upzheng

    FEA nonlinear analysis verification

    I tried solid/contact modeling with HEXA8 elements, I can do static linear analysis. the maximum stress lowered to 88.6ksi from 101 ksi (yield strength 110)obtained by using shell/beam elements. but the deflection decreased as well, which is .041 instead of 0.05. It seems that the transverse...
  3. upzheng

    FEA nonlinear analysis verification

    Thank your reply, guys. To Greglocock, I modeled the pin with certain number of beams weld to the center and the circle. To corus, I used the mesh by defining the surface mesh size in FEMAP. I checked the mesh, it not nice in the high stress area. The mesh at the high stress area is...
  4. upzheng

    FEA nonlinear analysis verification

    A C shape linkage is investigated for its maximum stress. The stress vs. Strain curve of the material is attached as Fig 1. The working condition and contour result are shown as Fig. 2, where there are two pin in the two end holes, the two centers of the holes are along the Y axis when the...
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