高压物理学报

关于自由面速度剖面解读层裂问题的几点商榷

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贺红亮

高压物理学报 | 2009,23(1): 1-8

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高压物理学报 | 2009 , 23 (1) : 1 -8

关于自由面速度剖面解读层裂问题的几点商榷

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贺红亮（1963—），男，研究员，博士生导师，主要研究方向为高压材料科学与力学. E-mail：honglianghe@263.net

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贺红亮

作者信息

中国工程物理研究院流体物理研究所，冲击波物理与爆轰物理国防科技重点实验室，四川绵阳　621900

作者简介:

贺红亮（1963—），男，研究员，博士生导师，主要研究方向为高压材料科学与力学. E-mail：honglianghe@263.net

Discussion on the Spallation Behavior Resolved by Free-Surface Velocity Profile

Hong-Liang HE

Affiliations

National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, China

出版时间: 2009-02-15

文章导航

摘要

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基于对层裂问题的理解和相关文献，就自由面速度剖面解读层裂问题的局限性提出了一些看法。指出：自由面速度剖面测量给出的层裂破坏过程是间接信息，而不是直接信息，用它确定的理论模型和数值模拟参数，也许并没有真实地反映层裂过程的物理本质；层裂强度常被人们用来表征材料在高应变率下的抗拉伸能力，但是在目前的层裂强度计算公式中没有考虑损伤介质对波剖面传播的影响，使得计算结果明显偏低；传统的单点测量得到的结果有很大的局限性，对于层裂问题，采用概率评估或者置信度评估，也许更符合真实情况。建议：为了全面真实地评价层裂问题中的物理、力学过程，应该加快发展更多的实验探测和诊断技术，尤其是对内部损伤状态的观测。

关键词

层裂 / 损伤 / 自由面速度剖面

Abstract

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A few questions on the spallation behavior resolved by the measurement of free-surface velocity profile have been discussed. Firstly, the way from the measured free-surface velocity profile to infer the dynamic damage behavior of the target is an “Inverse Problem” and the theoretical model and simulation parameters determined by such a solution maybe not represent the real physical nature of spall fracture inside the target. Secondly, how to calculate the spall strength? Due to the attenuation effect of micro-voids or damage on the wave propagation, the spall strength computed from the free-surface velocity profile is apparently lower than the tensile strength suffered by the shocked material. Thirdly, limitation of the traditional single-point measurement on the free-surface velocity profile is briefly reviewed. Given that the shocked target is inhomogeneous, the amplitude of the measured velocity profile is varied from point to point. According to these discussions, future research suggestions have been proposed in order to clearly understand the spallation behavior.

Key words

spall / damage / free-surface velocity profile

引用本文

贺红亮. 关于自由面速度剖面解读层裂问题的几点商榷. 高压物理学报, 2009 , 23 (1) : 1 -8 .

Hong-Liang HE. Discussion on the Spallation Behavior Resolved by Free-Surface Velocity Profile[J]. Chinese Journal of High Pressure Physics, 2009 , 23 (1) : 1 -8 .

基金

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国防科技重点实验室基金(9140C6701010701)
中国工程物理研究院科学技术基金重点项目(2007A01004)
国家自然科学基金委员会-中国工程物理研究院NSAF联合基金(10876014)

参考文献

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参考文献引证文献

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2009年第23卷第1期

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接收时间：2008-07-27
首发时间：2026-10-30
出版时间：2009-02-15

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出版历史

收稿日期：2008-07-27
修回日期：2009-01-05

基金

国防科技重点实验室基金(9140C6701010701)

中国工程物理研究院科学技术基金重点项目(2007A01004)

国家自然科学基金委员会-中国工程物理研究院NSAF联合基金(10876014)

作者信息

中国工程物理研究院流体物理研究所，冲击波物理与爆轰物理国防科技重点实验室，四川绵阳　621900

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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