| 高应变率下的率相关损伤演化及其对材料动态行为的影响(英文) |
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| 引用本文： | 王礼立,周风华,孙紫建,黄德进.高应变率下的率相关损伤演化及其对材料动态行为的影响(英文)[J].宁波大学学报(理工版),2012(1):27-34. |
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| 作者姓名： | 王礼立 周风华 孙紫建 黄德进 |
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| 作者单位： | 宁波大学力学和材料科学研究中心 |
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| 基金项目： | Supported by the National Natural Science Foundation of China(11032001);Russian Foundation for Basic Research(11-01-91217);K.C.Wong Magna Fund in Ningbo University |
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| 摘 要： | 实验和数模结果都揭示动态损伤演化同时依赖于应变和应变率.基于热激活机理提出了一个新的损伤演化率和一个新的断裂准则.为确定材料的损伤参数,发展了两种途径:DM-ZWT途径和BP神经网络途径.两种途径的理论预示都与实验数据很好地相一致.
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| 关 键 词： | 损伤演化 材料动态行为 高应变率 绝热剪切 |
Rate-dependent Damage Evolution and its Influence on Dynamic Behavior of Materials at High Strain Rates |
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| WANG Li-li,ZHOU Feng-hua,SUN Zi-jian,HUANG De-jin.Rate-dependent Damage Evolution and its Influence on Dynamic Behavior of Materials at High Strain Rates[J].Journal of Ningbo University(Natural Science and Engineering Edition),2012(1):27-34. |
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| Authors: | WANG Li-li ZHOU Feng-hua SUN Zi-jian HUANG De-jin |
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| Institution: | (Mechanics and Materials Science Research Center,Ningbo University,Ningbo 315211,China) |
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| Abstract: | Both experimental and numerical results reveal that dynamic damage evolution depends on both strain and strain rate.Based on the thermal activated mechanism,a new damage evolution law and a new fracture criterion are proposed.For determining the damage parameters of material,two approaches are developed:the DM-ZWT approach and the SHPB+BP neural network approach.The predictions by both approaches are in good agreement with the experimental data. |
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| Keywords: | damage evolution dynamic behavior of materials high strain rate adiabatic shearing |
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