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Modeling of Bolts

ron.kunz
Dear all,
I have a big assembly and want to model bolts in the complete assembly. What is the best and accurate way to model this.
Cbar analysis is accurate enough to analyse the bolt forces. Boltstress is of secundair interest.
Are there examples for these bolts?
In addition bar orientation for this CBAR property, how can this best be modeled?
 
Thanks in advance
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  • 0
    Yes, FORCE = ALL in case control outputs Element Forces to print file (f06) and plot file (XDB, or OP2 or HDF5). Additional details in Quick Reference Guide.
    Bar force orientation depends on the local element coordinate system and offsets. The x axis is always node 1-2 (including offsets), so the x force is the axial force (and torque is x moment).
     
    Vivek explained how to view in Patran.
     
    Regarding your model (using 2 bars vs 1 bar), either can be "correct". The better question is "is it realistic for my analysis?", which is model and load dependent. With 2 bars, you will get a deformation at the midspan. Note that Bar/Beam elements are designed for bending, and shear response should be checked.
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  • 0
    Yes, FORCE = ALL in case control outputs Element Forces to print file (f06) and plot file (XDB, or OP2 or HDF5). Additional details in Quick Reference Guide.
    Bar force orientation depends on the local element coordinate system and offsets. The x axis is always node 1-2 (including offsets), so the x force is the axial force (and torque is x moment).
     
    Vivek explained how to view in Patran.
     
    Regarding your model (using 2 bars vs 1 bar), either can be "correct". The better question is "is it realistic for my analysis?", which is model and load dependent. With 2 bars, you will get a deformation at the midspan. Note that Bar/Beam elements are designed for bending, and shear response should be checked.
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