节点文献
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)
Rate-dependent Damage Evolution and its Influence on Dynamic Behavior of Materials at High Strain Rates
【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.
【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.
【关键词】 损伤演化；
材料动态行为；
高应变率；
绝热剪切；
【Key words】 damage evolution； dynamic behavior of materials； high strain rate； adiabatic shearing；
【Key words】 damage evolution； dynamic behavior of materials； high strain rate； adiabatic shearing；
【基金】 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
- 【文献出处】 宁波大学学报(理工版) ,Journal of Ningbo University(Natural Science & Engineering Edition) , 编辑部邮箱 ,2012年01期
- 【分类号】O346.5
- 【被引频次】8
- 【下载频次】311