130 / 2023-04-14 15:42:46

Study on the causes of vacuoles in the ductile metal lamellar cracking process

高压物理与材料科学 > 动高压-海报

Comprehensive investigations into the deformation and failure of materials under high strain rates in high-speed impact scenarios are crucial to various engineering disciplines, including astrophysics, materials science, and aerospace engineering. Spallation, which is a dynamic damage phenomenon in materials resulting from the interaction of compressive stress waves with sparse stress waves reflected from the material interface, plays a significant role. The physical mechanism of spallation at the fine scale involves the nucleation, growth, and confluence of microdamage. For brittle and small viscous liquid materials, microcracks are the main form of microdamage, while for ductile and large viscous liquid materials, microporosity is predominant. The objective of this study is to employ classical molecular dynamics methods to investigate the fundamental causes of vacuole nucleation in materials during layer cracking.