FEAP – Driver for large deformation material

FEAP utilizes the subroutine ‘modlfd.f’ to control the material model in the large deformation. In the code,

umat = 1, Standard neo-Hookean elastic model, stnh3f.f
umat = 2, Modified neo-Hookean model, neoh3f.f
umat = 3, Ogden model, nalp3f
umat = 4, Finite stretch plasticity model, plasticity (plasfd), elastic (nalp3f)
umat = 5 and 6, Saint-Venant-Kirchhoff model (energy conserving capability), stvk.f
umat = 7, Fung Pseudo-exponential model, pfung.f
umat = 9, Mooney-Rivlin, mnrv3f.f
umat = 10, Modified Mooney-Rivlin, modmnrv.f
umat = 11, Arruda-Boyce model, arruda.f
umat = 12, Yeoh model, yeoh3f.f


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