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Incremental sheet metal forming

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RANEEN SAMI

Aerospace
Sep 25, 2017
2
Hi everyone
I am working on ISF with (explicit method,shell element and dynamic explicit step) and I got this result as shown in picture below,but when I use the same model but with implicit method I got this warnings please help me to fix it.

Path based tracking is defined in contact pair (assembly__pickedsurf41,assembly_tool-1_rigidsurface_). Path based tracking cannot be used with analytical rigid master surfaces, the state based tracking algorithm will be used instead.

There are 2 unconnected regions in the model.

The strain increment has exceeded fifty times the strain to cause first yield at 12 points

The strain increment has exceeded fifty times the strain to cause first yield at 1704 points

The strain increment is so large that the program will not attempt the plasticity calculation at 46 points

Thanks in advance
 
 http://files.engineering.com/getfile.aspx?folder=22b9348e-97bc-4066-8467-a448437d3921&file=explicit.jpg
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