Can NLSTAT with LGDISP=1 work out spring deformation problem?

hyperlove
hyperlove Altair Community Member
edited October 2020 in Community Q&A

Hello,

 

I saw a previous thread in this forum asking for help about an off-center 20-layer spring deformation problem.

 

The location of that thread is here: 

 

 

I wanted to continue that question, but with a spring meshed with solid elements (Not shell elements). 

 

---1st Q---:

How to define self contact of a spring meshed with solid elements (because every two adjacent layers will be in contact during spring compression)?

 

---2nd Q---:

Can OptiStruct NLSTAT with LGDISP=1 work out such highly geometric non-linear solid-meshed spring deformation problem?

 

For example, the analysis in that previous thread was trying to solve an 120-degree rotational displacement loadcase, but was ended with weird final deformation. 

 

Thank you.

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2018
    Altair Forum User said:

    How to define self contact of a spring meshed with solid elements (because every two adjacent layers will be in contact during spring compression)?

     

     

    Starting from 2017.2 one can model self-contact in OptiStruct.   To activate self-contact, the master surface ID needs to be kept blank or same with slave surface ID.

     

    Altair Forum User said:

    For example, the analysis in that previous thread was trying to solve an 120-degree rotational displacement loadcase, but was ended with weird final deformation. 

     

    This could be due to element distortion, other material properties. 

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