| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Multi Scale Modeling of Microstructure Deformation in Material Processing
|
| Presentation Title |
Hardness-dependent Plasticity and Damage Initiation Within Simulated Tension-shear Testing of AHSS Resistance Spot Welds |
| Author(s) |
Eric Brizes, Nathan Daubenmier, Antonio Ramirez |
| On-Site Speaker (Planned) |
Eric Brizes |
| Abstract Scope |
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. |