In this paper, an elastoplastic-damage constitutive model is presented. The formulation is cast within the framework of continuum damage mechanics (CDM) by means of the internal variable theory of thermodynamics. The damage is assumed as a tensor type variable and its evolution is developed based on the energy equivalence hypothesis. In order to discriminate the plastic and damage deformation, two surfaces named as plastic and damage are introduced. The damage surface has been developed so that it can model the nonlinear variation of damage. The details of the model besides its implicit integration algorithm are presented. The model is implemented as a user-defined subroutine user-defined material (UMAT) in the abaqus/standard finite element program for numerical simulation purposes. In the regard of investigating the capability of model, the shear and tensile tests are experimentally conducted, and corresponding results are compared with those predicted numerically. These comparisons are also accomplished for several experiments available in the literature. Satisfactory agreement between experiments and numerical predictions provided by the model implies the capability of the model to predict the plastic deformation as well as damage evolution in the materials.
A Nonlinear Damage Model of Hardening-Softening Materials
Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received August 22, 2016; final manuscript received June 24, 2017; published online September 13, 2017. Assoc. Editor: Huiling Duan.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Ganjiani, M. (September 13, 2017). "A Nonlinear Damage Model of Hardening-Softening Materials." ASME. J. Eng. Mater. Technol. January 2018; 140(1): 011010. https://doi.org/10.1115/1.4037656
Download citation file:
- Ris (Zotero)
- Reference Manager