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[891348308]

I am currently learing about Bauschinger effect in sheet metal forming. A one-element tension and compression is performed to plot the strain-stress curve of QP1180 sheet metal. To take Bauschinger effect into consideration, I used MAT_125 and Bao Steel QP1180 from the MatDB. However, the result didn't seem to reveal the Bauschinger effect and during the initial tension, the stress curve showed a stange twist. I wonder what going on. I'll be very appreciate if anyone can help. 

The boundary condition and result are listed in the pictures below.

[Pedram Samadian]

Hi,

Would you please confirm the solver version you used? Have you tried using the latest released solvers available at LS-DYNA (user=user) Download Page? Please try them and check if you get a similar result.

In the meantime, I’ll try to create a simple element model and verify the Bauschinger effect prediction.

I look forward rto your feedback.

Thanks,

Pedram

[Pedram Samadian]

Hi,

I created a simple cube tensile model using *MAT_125 in LS-DYNA and applied forward and reverse loading along the z-axis based on the trend shown below. The Bauschinger effect seems to be captured in the predictions. 

Input Loading History:

Output Stresses:

You might have the solver issue. Please try the latest versions.

 

Thanks,

Pedram