Zero Plastic strain & Vonmises stress in EPS material

Santhosh_22578
Santhosh_22578 New Altair Community Member
edited October 2020 in Community Q&A

Hi, I'm performing drop simulation on air conditioner with complete packaging. I modelled EPS (Expanded Polystyrene) material with crushable foam model. The run is being killed and showing error message ("Energy error limit reached"). When I checked the results of EPS material, it is undergoing very high deformation which is creating very high energy.

I have two questions.

1) How to avoid energy error ?

2) In EPS material, I'm observing zero plastic strain, VonMises stress even though it is undergoing high amount of deformation. What is the reason for this ?

 

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Answers

  • Rogerio Nakano_21179
    Rogerio Nakano_21179 New Altair Community Member
    edited January 2021

    Hi

     

    Which material law are you using?

    Looking at the output file image, it seems you are adding a lot of mass .

    Are you using any time step control?

    Please check the young modulus of the material.

    And also the element formulation used. For foam, please try Isolid=11 .

    Regards

     

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