高压物理学报

延性材料动态拉伸断裂早期连通过程的逾渗描述

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王永刚 ¹^,² , 贺红亮 ¹ , 王礼立 ² , 经福谦 ¹

高压物理学报 | 2006,20(2): 127-132

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高压物理学报 | 2006 , 20 (2) : 127 -132

延性材料动态拉伸断裂早期连通过程的逾渗描述

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王永刚¹^,², 贺红亮¹, 王礼立², 经福谦¹

作者信息

^1.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实验室，四川绵阳　621900

^2.宁波大学工学院力学与材料研究中心，浙江宁波　315211

通讯作者:

贺红亮（1963—），男，研究员，主要从事高压材料科学与力学研究. E-mail：honglianghe@263.net

作者简介:

王永刚（1976—），男，博士研究生，主要从事材料在高应变率加载下的动态损伤和断裂研究.

Percolation Description for the Early Stage of Void Coalescence during Dynamic Tensile Fracture in Ductile Materials

Yong-Gang WANG¹^,², Hong-Liang HE¹, Li-Li WANG², Fu-Qian JING¹

Affiliations

^1.Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, Mianyang 621900, China

^2.Mechanics and Materials Science Research Center, Ningbo University, Ningbo 315211, China

出版时间: 2006-06-05

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摘要

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借鉴逾渗理论，提出了新的应力松弛函数，简称PR函数（Percolation-Release Function），用以描述断裂发生前由于微孔洞连通而引起的快速应力松弛过程，具有较为明确的物理意义。通过其与损伤度函数模型进行耦合，对无氧铜和45钢平板撞击层裂进行了数值模拟。结果表明：数值计算不仅有效地再现了界面的应力历史和自由面速度历史，而且再现了靶中的损伤分布；新的逾渗松弛函数具有较好的适用性。

关键词

逾渗理论 / 应力松弛 / 损伤演化 / 拉伸断裂

Abstract

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Based on the frame of percolation theory, a new stress release function named as Percolation Release (PR) function has been proposed to describe the course of stress release during the early stage of void coalescence until the final or catastrophic fracture occurring. A clearly physical meaning is given for D_c0, the critical damage for the initiation of void coalescence, and D_f, the fracture critical damage. Coupled with damage function model proposed previously, PR function is applied to simulate the spall behaviors of OFHC copper and 45 steel as examples. Compared with the experimental measurements, numerical results indicate that the calculated stress profile and free surface velocity profile as well as the damage distribution in the materials being studied are consistent well with the experiments, and PR function has a good ability for describing the stress release just before the catastrophic fracture occurs.

Key words

percolation / stress release / damage evolution / tensile fracture

引用本文

王永刚, 贺红亮, 王礼立, 经福谦. 延性材料动态拉伸断裂早期连通过程的逾渗描述. 高压物理学报, 2006 , 20 (2) : 127 -132 .

Yong-Gang WANG, Hong-Liang HE, Li-Li WANG, Fu-Qian JING. Percolation Description for the Early Stage of Void Coalescence during Dynamic Tensile Fracture in Ductile Materials[J]. Chinese Journal of High Pressure Physics, 2006 , 20 (2) : 127 -132 .

基金

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国家自然科学基金NSAF项目(10476027)

参考文献

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参考文献引证文献

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2006年第20卷第2期

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接收时间：2005-03-23
首发时间：2026-11-01
出版时间：2006-06-05

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出版历史

收稿日期：2005-03-23
修回日期：2005-06-30

基金

国家自然科学基金NSAF项目(10476027)

作者信息

^1.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实验室，四川绵阳　621900

^2.宁波大学工学院力学与材料研究中心，浙江宁波　315211

通讯作者:

贺红亮（1963—），男，研究员，主要从事高压材料科学与力学研究. E-mail：honglianghe@263.net

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https://castjournals.cast.org.cn/joweb/gywlxb/CN/1323703561753862491

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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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