Strain-stress for an element

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

Hi, 

 

i defined stress-strain curve  using TABLES1 card and MATS1 cards and prepared my model to be calculated in optistruct. The problem is that while i'm checked the stress-strain variation in hyperview it shows a 0.003 strain for 742MPa value of stress for the same element and it's little bit weird. the stress-strain variation is as shown below, so for this stress the variation of strain should be between 0.05 and 0.07!! i want to see the plastic strain for this plastic constraint could anyone help !!

 

 

 

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

    Hi @riham1994

     

    What analysis type are you using?

     

    Can you increase the number of load increments and check if this gives any lead?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

    i'm using static analysis, could you develop what load increments means!

    i've seen a post of Rahul Ponginan saying that in non linear static analysis load shoould be applied in increments how can i do this please 

     

     

    <?xml version="1.0" encoding="UTF-8"?>capture3.PNG

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

    @riham1994

     

    If you are using NLSTAT as analysis type increase the NINC number in NLPARAM card which increases the number of number of increments. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

    honestly this is my first use of hypermesh for this type of analysis, could you be much more clear and explain it step by step :)/emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' />

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2020
  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

    hii, 

    i guess this doesn't work, i checked the log file and the plastic strain is zero for the very first iterations 

    ps: the running isn't completed yet