|
|||||
|
|
| 冲击载荷下盐岩的力学性能和本构关系研究 | |
| 引用本文： | 刘卫国,王肖钧,姜锡权.冲击载荷下盐岩的力学性能和本构关系研究[J].实验力学,2012,27(3):295-300. |
| 作者姓名： | 刘卫国 王肖钧 姜锡权 |
| 作者单位： | 1. 中国科学技术大学近代力学系,安徽合肥230027;中国人民解放军第96361部队,青海西宁810100 2. 中国科学技术大学近代力学系,安徽合肥,230027 3. 解放军炮兵学院,安徽合肥,230027 |
| 基金项目： | 国家重点基础研究发展计划(973计划)项目(2009CB724608);武器装备探索研究(7131013) |
| 摘 要： | 利用直径75mm的大尺寸SHPB实验装置开展盐岩的动态压缩性能实验研究,得到了其动态应力应变曲线。分析表明,在冲击压缩载荷作用下,盐岩材料有明显的损伤软化现象和应变率效应。针对实验曲线,通过引入描述材料强度随应变率强化的应变率增强因子和随不可逆变形发展而弱化的损伤因子,提出了含损伤率的相关动态本构模型,拟合得到的本构方程形式比较简单,能够较好地反映盐岩动态实验加载过程的主要特征,具有一定的工程应用价值。 |
| 关 键 词： | 盐岩 分离式霍普金森压杆(SHPB) 动态本构关系 损伤软化 |
| 收稿时间： | 4/6/2011 12:00:00 AM |
Study of the Dynamic Behavior and Constitutive Relation of Salt Rock Acted by Impact Loading |
|
| LIU Wei-guo , WANG Xiao-jun , JIANG Xi-quan.Study of the Dynamic Behavior and Constitutive Relation of Salt Rock Acted by Impact Loading[J].Journal of Experimental Mechanics,2012,27(3):295-300. | |
| Authors: | LIU Wei-guo WANG Xiao-jun JIANG Xi-quan |
| Institution: | 1.Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, Anhui, China; 2.The Chinese People's Liberation Army Unit 96361, Xi'ning 810100, Qinghai, China;Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, Anhui, China;The Artillery Academy, Hefei 230031, Anhui, China |
| Abstract: | A 75mm large-diameter SHPB was used to study the dynamic compression property of salt rock. Dynamic stress-strain curve was obtained, and analysis reveals that the salt rock presents remarkable effect of strain hardening and damage softening. A dynamic constitutive model for the salt rock was proposed by using two variables: one is the strain rate strengthen factor to describe the strain hardening and the other one is the damage factor related to irreversible strain to describe the strain softening. The agreement between the constitutive relation and the experimental results is quite well. The new relation is relatively simple and easy obtained, hence, is worth in engineering application. |
| Keywords: | salt rock Split Hopkinson Pressure Bar (SHPB) dynamic constitutive relation damage softening |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《实验力学》浏览原始摘要信息 | |
| 点击此处可从《实验力学》下载免费的PDF全文 | |