foam-extend4.1-coherent-io/applications/solvers/solidMechanics/elasticPlasticNonLinTLSolidFoam/calculateDEpsilonDSigma.H

// Increment of Green finite strain tensor
DEpsilon = symm(gradDU) + 0.5*symm((gradDU & gradU.T()) + (gradU & gradDU.T()) + (gradDU & gradDU.T()));

// Increment of second Piola-Kirchhoff stress tensor
DSigma = 2*mu*(DEpsilon - DEpsilonP) + lambda*(I*tr(DEpsilon));
Update and clean-up of solid mechanics 2014-04-10 16:45:26 +00:00			`// Increment of Green finite strain tensor`
Rearranging solidMechanics solvers and src, and added wmake darwin rules 2013-10-11 13:31:14 +00:00			`DEpsilon = symm(gradDU) + 0.5*symm((gradDU & gradU.T()) + (gradU & gradDU.T()) + (gradDU & gradDU.T()));`

Update and clean-up of solid mechanics 2014-04-10 16:45:26 +00:00			`// Increment of second Piola-Kirchhoff stress tensor`
Rearranging solidMechanics solvers and src, and added wmake darwin rules 2013-10-11 13:31:14 +00:00			`DSigma = 2mu(DEpsilon - DEpsilonP) + lambda(Itr(DEpsilon));`