About this Abstract |
Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
Presentation Title |
An Extended GTN Ductile Fracture Model for a Broad Range of Stress States |
Author(s) |
Hongfei Wu, Xincun Zhuang, Zhen Zhao |
On-Site Speaker (Planned) |
Xincun Zhuang |
Abstract Scope |
This contribution provides an extended GTN model for predicting damage and fracture of metallic materials under high, low and negative stress triaxiality loadings. In this proposition, two internal damage variables are introduced into GTN model in order to affect the hydrostatic stress and deviatoric stress contributions. The first damage variable is void volumetric damage due to the nucleation, growth, inner-necking of primary voids and nucleation of secondary voids. The void shear damage is proposed as the second damage variable taking the void rotation, distortion and secondary nucleation into account. A novel effective damage is constructed to combine these two damage contributions during the deformation. The extended GTN model has been implemented into ABAQUS/Explicit and the parameters are calibrated through the inverse analysis under different stress states. The validity of the new model is assessed by comparing numerical prediction with experimental measurements. |
Proceedings Inclusion? |
Definite: At-meeting proceedings |