6 lines
254 B
C
6 lines
254 B
C
|
//- 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 + lambda*(I*tr(DEpsilon));
|