Numerical Model For Rubber-like Materials Suitable For Computer Aided Engineering Analysis
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United States of America Patent
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Issued Date -
Oct 1, 2015
app pub date -
Mar 26, 2014
filing date -
Mar 26, 2014
priority date (Note) -
Abandoned
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Abstract
Systems and methods to create a numerical model for rubber-like material including Mullins effect based on test data obtained in a bi-axial tension test of a specimen of a rubber-like material of interest are disclosed. Based on inflating-pressure versus displacement-at-the-pole data, first set of constants of the Mooney-Rivlin constitutive equation used as strain-energy density function are determined in the loading phase. Second set of numerical constants in an unloading-phase damage function are determined. The unloading-phase damage function is used for modifying the strain-energy density function in the unloading phase and contains a hyperbolic tangent function with dimensionless operands that include a peak strain energy value occurred immediately before the unloading phase. Third set of constants in a subsequent reloading-phase damage function are determined. The subsequent reloading-phase damage function is used for modifying the strain-energy density function in the reloading phase.
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