About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Lightweight Composites, Materials & Alloys
|
| Presentation Title |
Anisotropic Continuum Damage Mechanics Based-Fracture Surface: Application to Aluminum alloy 6DR1 |
| Author(s) |
Ossama Abou Ali Modad, Georges Ayoub |
| On-Site Speaker (Planned) |
Ossama Abou Ali Modad |
| Abstract Scope |
Accurate prediction of fracture behavior in anisotropic ductile metals is critical for ensuring structural reliability. Conventional models often capture intrinsic material anisotropy but neglect anisotropic damage evolution, limiting their predictive capabilities. This study proposes a novel continuum damage mechanics (CDM)-based framework that integrates intrinsic anisotropy and anisotropic damage evolution. The model combines anisotropic, time-dependent damage-coupled plasticity, to predict mechanical, damage, and fracture behavior. Validation is performed on Al alloy 6DR1 under various loading conditions. A novel fracture surface is also identified by transforming the CDM formulation from stress space to a parameterized space defined by equivalent plastic strain, stress triaxiality, and Lode angle. Calibrated against experiments, the model offers improved accuracy compared to uncoupled models. This study not only underscores the importance of incorporating damage anisotropy but also provides a robust modeling framework for applications in advanced metal-forming processes and structural integrity assessments. |