MATX28 definition

Altair Forum User

Hi, I'm simulating a honeycomb structure subjected to mostly shear loading with NLGEOM implicit static step. I'm having trouble defining the material using MATX28 option under MAT9ORT material card.

 

I created a simple model just for testing the NL properties of the material before doing a more complex model, and I can get the analysis to converge using MATS1 material card as shown in the screenshot, but not with MATX28.

So I have some questions: under the TIID(XX) parameter which is input through the TABLES1, how many data points is the parameter expecting? Is it expected to input only the plastic part of the curve with the first point the yield stress and 0 plastic strain or I must input the whole curve? I tried finding this info in the ebook or Hypermesh help and didn't find it...
Also, is the element deletion after total failure in this case automatically activated or I need to enable it somehow?

 

Thanks in advance,

 

Matt

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Altair Forum User

Hi @Matt_03

 

Since there is no strain type option available, you need to input entire stress-strain curve