Determination Of Failure In Sheet Metal Forming Simulation Using Isotropic Metal Failure Criteria
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United States of America Patent
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Issued Date -
Jan 16, 2014
app pub date -
Jul 16, 2012
filing date -
Jul 16, 2012
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Abstract
Systems and methods of determining structural failure in a computer simulation of manufacturing a sheet metal part are disclosed. A FEA model defined for a sheet metal manufacturing procedure includes a plurality of shell elements representing sheet metal blank. Shell elements are configured for emulating anisotropic material properties of the sheet metal. Numerically-simulated structural behaviors are obtained by conducting a computer simulation of manufacturing the sheet metal part using the FEA model with a metal forming simulation application module. The numerically-simulated structural behaviors include structural deformations in forms of equivalent strain and plastic flow direction during forming of the sheet metal part. A structural failure determination criterion is constructed using a planar isotropic material model of the sheet metal. Finally, the obtained structural behaviors are compared with the failure determination criterion to determine whether there is a structural failure in the computer simulation of manufacturing the sheet metal part.
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