Force vs Displacement (Loading curve)

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

I have a force vs displacement curve(curve is not linear) .I need to apply force using this curve .How can I acheive it.

Kindly suggest me.

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2015

    Kindly rply

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2015

    Hi,

     

    Please let us know for which solver are you referring to.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited January 2016

    Hello, Prakash

            Now I have the same problem with Jones, I use Optistrut as the solver. Could you tell me how to apply this force?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited January 2016

    Hi,

     

    Can you define the use case?

     

    What is the analysis about and what type of analysis?

     

    You can use PBUSHT elements with type as KN to give force Vs deflection curve.

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2016

    Hi Prakash,

    I am not clear about the usage of PBUSHT cards. It is there inside the PBUSH property itself. I wanted to know how the PBUSH K values are connected to the PBUSH T kN values. Does the K values represent a scale factor to the kN value?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2020

    Hi Gopal.

     

    Yes, it acts a scaling factor. Maybe you can test it your self with the attached model. 

     

    Unable to find an attachment - read this blog

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2016

    HI,

    Thank you for the file. I was able to see the behaviour by changing the values and it acted as scale factor.

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2016

    Hi,

    I have attached an image for creating spring elements in optistruct. Does this dof in the image refers to tick the dof which along the axis of spring?<?xml version="1.0" encoding="UTF-8"?>spring dof.JPGspring dof.JPG

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2016

    Gopal,

     

    The selected Dof will be applied to the element 

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited November 2020
    Altair Forum User said:

    Hi Gopal.

     

    Yes, it acts a scaling factor. Maybe you can test it your self with the attached model. 

     

     

    I made a similar file to check for scale factor functioning.

    It is not working in the attached file for me and not able to find where I am doing the mistake

    Thank you

    Unable to find an attachment - read this blog

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2018

    Hi

    @Prakash Pagadala@Rahul R

    Can you help

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2018

    Hi @gopal_rathore

     

    In your model, you are applying a prescribed displacement which may not show the effect of the K. 

     

    Can you try with force as the load?

    <?xml version="1.0" encoding="UTF-8"?>Spring_K.png

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2018

    Hi @Prakash Pagadala

     

    I have given force as load . Can you please confirm

     

    Thank you

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2018

    Hi,

     

    Sorry, my mistake, I have another with imposed displacement. 

     

    I will check and come back to you soon,

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