About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithm Development in Materials Science and Engineering
|
Presentation Title |
Initializing Grain and Sub-grain scale Residual Stress in Crystal Plasticity Simulations |
Author(s) |
Ritwik Bandyopadhyay, Kartik Kapoor, Michael D. Sangid |
On-Site Speaker (Planned) |
Michael D. Sangid |
Abstract Scope |
Residual stresses, due to either processing or prior loading, are ubiquitous in all materials and can have tremendous effects on performance. Crystal plasticity finite element models can predict the mechanical behavior of materials, but these approaches model pristine grains without prior residual stresses. In this presentation, we will discuss initializing residual stresses via several approaches. First, we introduce residual stress based on measured values at the sub-grain (spatial variation in the geometric necessary dislocation (GND) density) and grain (grain-averaged elastic deformation gradients) scale and use these values to initialize the residual stress. Second, we propose a framework to introduce intragranular misorientation (IGM) within virtual microstructures and calculate the GND density and residual stress distributions in a statistically consistent manner. For each case, we quantify and discuss the role of initializing the residual stress at the sub-grain and grain scale based on the results of crystal plasticity simulations. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, ICME, Computational Materials Science & Engineering |