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Merge branch 'master' of ssh://git.code.sf.net/p/foam-extend/foam-extend-3.2
[foam-extend-3.2.git] / applications / solvers / solidMechanics / elasticNonLinIncrTLSolidFoam / calculateDEpsilonDSigma.H
blobac0171996d8d372bf910c462bd33bdcd9e6a6cf3
1 //- Increment of Green finite strain tensor
2 DEpsilon = symm(gradDU) + 0.5*symm((gradDU & gradU.T()) + (gradU & gradDU.T()) + (gradDU & gradDU.T()));
3
4 //- Increment of second Piola-Kirchhoff stress tensor
5 DSigma = 2*mu*DEpsilon + lambda*(I*tr(DEpsilon));
The foam-extend project is a fork of the OpenFOAM® open source library for Computational Fluid Dynamics (CFD). It is an open project welcoming and integrating contributions from all users and developers.