How to set up the material failure for beam element?

empty4585

1 Introduction
      Few days ago, Brother. You asked a question, and this's the description: He wants to  make the material failure of beam element, but whatever he've done, it didn't work. He used the material 03, *MAT_Plastic_Kinematic, and gave the failure criterion by FS. Then he tried to add the erosion by *MAT_ADD_EROSION, but nothing happened.
     At this opportunity, I make the simple test and try to make some conclusion.

2 Preparation
     The model is set up as a cantilever beam subjected to uniaxial tension as below:
     
     The basic element section and material input parameters:
     
     
     And i make four cases:
   
    They are related to the following Keywords:
    1, FS is the EPS failure for MAT03;
    2, A_erosion means *MAT_ADD_EROSION;
    3, BeamIP can be found in *DATABASE_EXTENT_BINARY.
    Read the Manuals for more details.

3 Results and conclusions
    Firstly, the VM-ES and EPS of CASE 1 are shown:
   
   We can see that the VM-ES is 636.7Mpa and EPS is 0.0368 at the last state, and this is why i make the CASE 2, 3 and 4.
   Secondly, the four cases comparision as follow:
   
   So, we can make some preliminary conclusions:
   1, MAT03 can be used for HL beam(and Truss, elemform=1,3), and the FS is available;
   2, BeamIP only affects the plot of the beam stress and strain;
   3, *MAT_ADD_EROSION is worked for beam element types 1 and 11.

P.S.  Time is short, so the content above is very simple, and if you've found any mistake, don't hesitate to tell me.
        Thank you very much.

The input K file of CASE 4 as below:

hekaistorm

我来赞一个

yuguoji

我来赞一个

sanycsu

赞一个，高手

lpr0316

虽然我看不懂 赞一个

dut1

学习了，*MAT_ADD_EROSION 对beam 单元还没有是试过，用过MAT03  FS是可以的，另外要想记录并在ls-prepost中显示beam积分点的结果必须要设置*DATABASE_EXTENT_BINARY中的BeamIP

wuxingxing

真的老外做的？