LS-DYNA allows several ways to model of stress relaxation often seen in viscoelastic materials when subjected to a sudden constant strain. The methods to model the stress relaxation is briefly discussed here. 1. Curve Input When using MAT_GENERAL_VISCOELASTIC material model, one can directly input the time log dependence of the relaxation modulus using LCID parameter. [...]
Archive for April 16th, 2007
Stress Relaxation in Viscoelastic Material Models
Published by April 16th, 2007 in LS-DYNA Bytes and LS-DYNA Materials. 1 CommentA modified version of the NHTSA finite element model of the USSID is now available at no charge. LSTC USSID version 1.0 (LSTC FTP site) LSTC USSID
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