MICROSTRUCTURAL DATA FOR MODEL DEVELOPMENT AND VALIDATION

摘要

The dynamic deformation of metallic polycrystalline materials leading to ductile damage and failure events involves a complex series of physical processes which are poorly understood. This lack of understanding prevents us from properly formulating and offering the appropriate physically based theories for accurate and robust representation of the ductile damage and failure response of ductile materials. This paper briefly describes and illustrates a coupled experimental and computational methodology to develop greater physical insight linking the structural details of the material to its formation of damage sites. Results from examinations of both tantalum and copper are presented to illustrate the types of methodologies that will be needed in the future to better understand the critical physical processes occurring in polycrystalline metallic materials leading to their catastrophic failure.