高压物理学报2024，Vol.38Issue(3)：59-69,11.DOI:10.11858/gywlxb.20240786
不同波形加载下[100]单晶铝层裂破坏的分子动力学模拟研究
Molecular Dynamics Simulation Study on Spallation Failure of[100]Single Crystal Aluminum under Different Waveform Loadings
摘要
Abstract
In this study,molecular dynamics method was used to simulate the deformation and spallation behavior of[100]single crystal aluminum under the action of equivalent ramp waves and square waves.Accordingly,the correlation between loading waveform and spallation behavior was analyzed.The results showed that the synergistic effect of the pulse shape transition and the thermodynamic path affected the material spallation.The nucleation of non-uniform holes dominated by defects was not the decisive factor affecting the spallation strength of materials.The difference of spallation characteristics of materials under different loading waveforms was mainly determined by the difference of temperature rise under different thermodynamic paths,which led to uniform spallation at maximum velocity of 3.00 km/s,but the spall strength of ramp wave group was 56.6％higher than that of square wave group.Due to the gradual compression and slight temperature softening effect,the ramp wave loading made the material presented milder damage than the impact loading,which became more significant with the increase of loading speed.关键词
层裂/单晶铝/分子动力学模拟/斜波加载Key words
spallation/single crystal aluminum/molecular dynamics simulation/ramp wave loading分类
数理科学引用本文复制引用
杨向阳,吴楯,祝有麟,李俊国,张睿智,张建,罗国强..不同波形加载下[100]单晶铝层裂破坏的分子动力学模拟研究[J].高压物理学报,2024,38(3):59-69,11.基金项目
国家自然科学基金(51932006) （51932006）
湖北省技术创新专项重大项目(2019AFA176) （2019AFA176）
