强激光与粒子束, 2014, 26 (3): 031003, 网络出版: 2014-03-31
激光加载锡的动态破碎颗粒尺寸分布
Size distribution of fragments resulting from dynamic fragmentation of laser shock-loaded tin
微层裂 动态破坏 尺寸分布 激光加载 应变率 microspall dynamic fragmentation size distribution laser shock-loaded strain rate
摘要
基于Grady能量破坏准则,结合固体动态断裂碎块尺寸分布规律研究结果,提出了材料微层裂破碎颗粒质量分布改进模型,并对强激光加载下锡的熔化破碎实验进行了理论计算。研究显示,理论计算的锡的微层裂破碎颗粒分布数随直径变化规律与实验结果一致,模型进一步改进需考虑应变率变化等更多综合因素影响。
Abstract
A general approach based on the energetic fragmentation criterion inspired by Grady is considered. Starting from size distribution of fracture advised in our early research, mass distribution law is derived for dynamic failure process in liquid metals. This approach is also discussed and compared with experimental observation of dynamic fragmentation in melted state of laser shocked-loaded tin, and the theoretical curves can give a good comparability with experimental distribution. Further, the major causes of discrepancy between theoretic predictions and experimental observations are discussed, and further work is needed to better understand the evolution of this microspall process.
李英华, 张祖根, 李俊, 李牧, 张林. 激光加载锡的动态破碎颗粒尺寸分布[J]. 强激光与粒子束, 2014, 26(3): 031003. Li Yinghua, Zhang Zugen, Li Jun, Li Mu, Zhang Lin. Size distribution of fragments resulting from dynamic fragmentation of laser shock-loaded tin[J]. High Power Laser and Particle Beams, 2014, 26(3): 031003.
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