Predicting ductile failure of advanced high strength steel with shell element models
- 2018-10-26 10:28:00
- LUQIMENG Original
- 2235
Focus on simplicity and robustness of experimental technique:
? All experiments can be performed in a uniaxial testing machine
? Strains to fracture can be directly measured on specimen surface (no FEA needed)
? Localized necking criterion for arbitrary loading conditions e.g. combination of bending and membrane loading
? What if localized necking does not occur?
? Three point bending of hot stamped martensitic hat section
? Developed HC ductile fracture model accounting for (a) stress state, (b) strain rate, (c) anisotropy, and (d) loading history
? Basic version of HC model requires results from three calibration experiments only
? All calibration experiments can be performed in a uniaxial testing frame and fracture strain is directly measured using digital image correlation
? Presented SHPB technique for oscillation-free measurements at intermediate and high strain rates
? By combining the Domain of Shell-to-Solid Equivalence and HC model, ductile failure is conveniently predicted with shell finite elements