铍在惯性燃料聚变舱状态下的动态塑性
Dynamic plasticity of beryllium in the inertial fuel fusion capsule regime
摘要：
采用表面测速仪和原位x射线衍射技术研究了铍在激光诱导冲击波加载过程中的塑性响应。通过热X射线（黑腔）加载的结果与使用激光烧蚀的更广泛的研究一致。观察到强弹性波，自由表面速度高达~1 km/s，在塑性冲击到达之前具有显著的结构。先驱体的大小和形状可以用基于位错动力学的塑性模型来再现。从X射线衍射图中测得的晶格间距的变化给出了弹性波中的单轴压缩、前体衰变中的三轴流动和塑性冲击中的三轴压缩的直接测量;这些与速度数据一致。从激光实验中推导出的动态强度行为被用来帮助解释冲击诱导熔化开始周围的表面速度数据。非均匀混合物的模型正在扩展到处理各向异性组件和层裂。
英文摘要：
The plastic response of beryllium was investigated during loading by laser-induced shock waves, using surface velocimetry and in-situ x-ray diffraction. Results from loading by thermal x-rays (hohlraum) were consistent with more extensive studies using laser ablation. Strong elastic waves were observed, up to ~1 km/s in free surface speed, with significant structure before the arrival of the plastic shock. The magnitude and shape of the precursor could be reproduced with a plasticity model based on dislocation dynamics. Changes in lattice spacing measured from the x-ray diffraction pattern gave a direct measurement of uniaxial compression in the elastic wave, triaxial flow from the decay of the precursor, and triaxial compression in the plastic shock; these were consistent with the velocity data. The dynamic strength behavior deduced from the laser experiments was used to help interpret surface velocity data around the onset of shock-induced melting. A model of heterogeneous mixtures is being extended to treat anisotropic components, and spall.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
