arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1005.0908cond-mat.mtrl-sci
收藏

多孔材料的Shock Wave响应：从塑性到弹性

Shock Wave Response of Porous Materials: From Plasticity to Elasticity

Aiguo Xu, Guangcai Zhang, Yangjun Ying, Ping Zhang, Jianshi Zhu

备注：
6 figures, Fig.1 in JPG format
发表信息：
Phys. Scr. 81 (2010) 055805.
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

冲击波反应导致多孔材料中的各种特征区域。这些区域的几何和拓扑性质在实际应用中受到高度关注。通过对高温特征区域的形态学分析，研究了多孔材料受冲击后的热力学行为，其力学性质涵盖了从超塑性到弹性的广泛范围。结果表明，在冲击强度一定的情况下，含$T \geq T_{th}$的高温区总面积$A$及其饱和值随初始屈服$σ_{Y0}$的增大先增大后减小，其中$T_{th}$为给定的温度阈值$T$ .在冲击加载过程中，如果$T_{th}$和$σ_{Y0}$选择适当，则分数面积$A(t)$可显示相同的行为。在相同的$A(t)$行为下，$T_{th}$随着$σ_{Y0}$先增大后减小。在最大点$σ_{Y0M}$，冲击波贡献最大塑性功。在$σ_{Y0M}$周围，具有不同机械性能的两种材料甚至对于相同的$T_{th}$也可能具有相同的$A(t)$行为。具有较大$σ_{Y0}$的材料中的特征区域更加分散。

英文摘要：

Shock wave reaction results in various characteristic regimes in porous material. The geometrical and topological properties of these regimes are highly concerned in practical applications. Via the morphological analysis to characteristic regimes with high temperature, we investigate the thermodynamics of shocked porous materials whose mechanical properties cover a wide range from hyperplasticity to elasticity. It is found that, under fixed shock strength, the total fractional area $A$ of the high-temperature regimes with $T \geq T_{th}$ and its saturation value first increase, then decrease with the increasing of the initial yield $σ_{Y0}$, where $T_{th}$ is a given threshold value of temperature $T$. In the shock-loading procedure, the fractional area $A(t)$ may show the same behavior if $T_{th}$ and $σ_{Y0}$ are chosen appropriately. Under the same $A(t)$ behavior, $T_{th}$ first increases then decreases with $σ_{Y0}$. At the maximum point $σ_{Y0M}$, the shock wave contributes the maximum plastic work. Around $σ_{Y0M}$, two materials with different mechanical properties may share the same $A(t)$ behavior even for the same $T_{th}$. The characteristic regimes in the material with the larger $σ_{Y0}$ are more dispersed.

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。

↑