Abstract
This paper presents a constitutive model, which combines the models proposed by Stewart and Cazacu (2011) and Zhou et al. (2014), to describe the ductile damage process in a commercially pure titanium (CP Ti) and to simulate its mechanical response. In particular, a Gurson-type porous material model is modified by coupling two damage parameters, accounting for the void damage and the shear damage respectively, into the yield function and the flow potential. The plastic anisotropy and tension-compression asymmetry exhibited by CP Ti are accounted for by a plasticity model based on the linear transformation of the stress deviator. The theoretical model is implemented in the general purpose finite element software ABAQUS via a user defined subroutine and calibrated using experimental data. Good comparisons are observed between model predictions and experimental results for a series of specimens in different orientations and experiencing a wide range of stress states.
| Original language | English |
|---|---|
| Pages (from-to) | 26-45 |
| Number of pages | 20 |
| Journal | International Journal of Solids and Structures |
| Volume | 91 |
| DOIs | |
| State | Published - Aug 1 2016 |
Bibliographical note
Funding Information:This research is made possible by funding from the Office of Naval Research (through Naval Research Laboratory) and from the Office of the Secretary of Defense, Technical Corrosion Collaboration program (through NCERCAMP and US Air Force Academy). The authors also acknowledge the assistance of Alexis Lewis for performing the texture scans.
Publisher Copyright:
© 2016 Elsevier Ltd. All rights reserved.
Keywords
- Ductile fracture
- Plastic anisotropy
- Shear damage
- Tension-compression asymmetry
- Void damage
ASJC Scopus subject areas
- Modeling and Simulation
- Materials Science (all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Applied Mathematics