added new methods for ViscoSecondDerivative with TensorRow

src/elasticity/materials/Material.hpp

@@ -290,6 +290,16 @@ public:
     return viscoMat->SecondDerivative(F, L, H, G);
   }
 
+  double ViscoSecondDerivative(const Tensor &F, const Tensor &L, const Tensor &H,
+                               const TensorRow &G) const {
+    return viscoMat->SecondDerivative(F, L, H, Tensor(G));
+  }
+
+  double ViscoSecondDerivative(const Tensor &F, const Tensor &L, const TensorRow &H,
+                               const Tensor &G) const {
+    return viscoMat->SecondDerivative(F, L, Tensor(H), G);
+  }
+
   const std::string &Name() const { return hyperelMat->Name(); }
 
   double GetParameter(int i) const {