Skip to Main content Skip to Navigation
Journal articles

An enhanced Lemaitre model formulation for materials processing damage computation

Abstract : The Lemaitre damage model is now widely used to deal with coupled damage analyses for various mechanical applications. In this article, different extensions of the model are presented and discussed to deal with complex multiaxial configurations--such as multi-stages bulk forming processes. A specific treatment is done to account for compressive damage growth, and a stress triaxiality cut-off value is considered to avoid any damage evolution below a critical negative triaxiality. The damage potential is also modified to deal with highly ductile materials, and the plastic strain is split into a negative part and a positive part to differentiate damage growth for compressive states of stress and for tensile states of stress. Finally, an anisotropic damage approach based on the comparison between grain flow orientation and principal loading directions is defined. A combination of these extensions is achieved within a single Lemaitre formulation. Application on different examples show the robustness and accuracy of the model defined in this paper.
Document type :
Journal articles
Complete list of metadata

Cited literature [34 references]  Display  Hide  Download
Contributor : Magalie Prudon Connect in order to contact the contributor
Submitted on : Friday, March 9, 2012 - 9:53:57 AM
Last modification on : Monday, July 4, 2022 - 9:46:40 AM
Long-term archiving on: : Thursday, June 14, 2012 - 4:23:15 PM


Files produced by the author(s)



Pierre-Olivier Bouchard, Ludovic Bourgeon, Sébastien Fayolle, Katia Mocellin. An enhanced Lemaitre model formulation for materials processing damage computation. International Journal of Material Forming, Springer Verlag, 2011, 4 (3), pp.299-315. ⟨10.1007/s12289-010-0996-5⟩. ⟨hal-00521625⟩



Record views


Files downloads