TFEL/MFront 3.1.2

The TFEL library is a collaborative effort of the French Atomic Commission and √Člectricit√© de France. TFEL mostly includes the MFront code generator. MFront is based on C++ and provides several domain specific languages which were designed to simplify the implementations of new material properties, mechanical behaviours and simple material models. A particular focus was made on mechanical behaviours which are by essence more complex and may have significant impact on the numerical performances