Element stress

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi, I am designing frame structure. and I want to know the stress of each member. 

 

I've given member 4,000 N of strength, but output is just 13.57 ... 

 

Is it 13.57N? 

 

I don't know if it is right to analyze the results..

<?xml version="1.0" encoding="UTF-8"?>12344.PNG

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Answers

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

    I've given member 4,000 N of strength, but output is just 13.57 ... 

     

    Is it 13.57N? 

    Do you mean, you have applied 4000N force on a member? 

     

    The result which you are seeing is elemental stresses. So, 13.57 is the maximum stress generated in the member. Stress will be in N/mm2 or N/m2 , depends on the units you are using for modeling.

     

    Please, explain your issue with some images. (What kind of structure, constraints and Analysis?) 

     

    Thank you

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2018

    I have applied 4000N on a node like pic1.

     

    When I view Hyperview, the frame member represents 13.57 ..

    <?xml version="1.0" encoding="UTF-8"?>q1.PNG

    <?xml version="1.0" encoding="UTF-8"?>q2.PNG

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

    I have applied 4000N on a node like pic1.

     

    When I view Hyperview, the frame member represents 13.57 ..

    Yes. because load will be taken by all the members . So, 13.57 units is the maximum stress generated.

     

     

    Thank you

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2018

    Hmm.. 

     

    I want to check if each frame member exceeds yield strength for input load.   

     

    Is it correct to assume that 13N is too small to withstand the load of 1020 tubes? (Because 1020 tube's yield strength is 350 MPa)

     

    For the more correct analyze, do I have to meshing the frame member?

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

     

    Is it correct to assume that 13N is too small to withstand the load of 1020 tubes? (Because 1020 tube's yield strength is 350 MPa)

    Maximum stress generated is 13 mpa. Yield strength of a member is 350 mpa. This means the member is safe and can take more load.

     

    Yes, for more accurate result you can refine mesh and check.

     

    Thank you

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2018

    Great! thank you..

     

    Can I ask one more?

     

    When I import solver deck after I save the model before analysis, there is no node on hypermesh optistruct like pic 1.  

     

    Is there no way to restore the nodes ?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2018

    Goto Temp nodes and select nodes > All. It will display all the nodes.

     

     

    Thank you

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited December 2018

    Great! thank you..

     

    Can I ask one more?

     

    When I import solver deck after I save the model before analysis, there is no node on hypermesh optistruct like pic 1.  

     

    Is there no way to restore the nodes ?

  • llyle_20499
    llyle_20499 New Altair Community Member
    edited December 2018

    You can try using Preserve Node option in analysis panel too or else save the file as .hm. 

     

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