|About this Abstract
||MS&T22: Materials Science & Technology
||Multi Scale Modeling of Microstructure Deformation in Material Processing
||Hardness-dependent Plasticity and Damage Initiation Within Simulated Tension-shear Testing of AHSS Resistance Spot Welds
||Eric Brizes, Nathan Daubenmier, Antonio Ramirez
|On-Site Speaker (Planned)
Integrated modeling frameworks that simulate automotive spot welding of advanced high-strength steels (AHSS) need to consider local fusion zone and heat-affected zone properties because these regions have significantly different mechanical behaviors than the base material. A recently developed numerical method to predict hardness across the spot welded joint, coupled with scaling of the base material flow stress is evaluated in this work to quantify such a general approach's impact on simulated weld performance testing. Experimental spot welds of various nugget diameters were made on a press-hardenable AHSS and destructively tested in the tension-shear test configuration. Finite element simulation of tension-shear testing was performed using hardness-dependent material plasticity and damage. A comparison of the simulated and experimental tension-shear tests showed good agreement and enabled prediction of the joint peak force and displacement at failure with minimal errors of 10% and 14%, respectively, and correct classification of spot weld fracture mode.
||Planned: Other (journal publication, etc.; describe below)