| GFPP玻璃钢的SHPB实验及动态性能分析 |
| |
| 引用本文： | 邓小清,蔡爱军,张磊.GFPP玻璃钢的SHPB实验及动态性能分析[J].铜仁学院学报,2007,1(2):87-90. |
| |
| 作者姓名： | 邓小清 蔡爱军 张磊 |
| |
| 作者单位： | 1. 长沙理工大学物,理与电子系,湖南,长沙,410077
2. 中国科技大学,材料力学行为和设计重点实验室,安徽,合肥,230027 |
| |
| 基金项目： | 致谢：中国科学与技术大学力学与机械工程系的胡时胜教授在试件加工、试验方案确定和结果分析中都给予了很多指点,在此表示衷心感谢. |
| |
| 摘 要： | 利用分离式Hopkinson压杆(SHPB)研究了GFPP玻璃钢的在不同应变率下的力学响应,通过其动态的应力应变曲线发现,其属于一种典型的粘弹性材料,具有明显的应变率敏感性。在冲击载荷作用下,GFPP玻璃钢表现出明显的各向异性,分析认为:其各向异性除了与纤维的排列和铺层等有关外,材料中的微裂纹和空洞等损伤的发展演化也会导致各向异性。损伤的发展演化将导致材料的软化和破坏;并且损伤的发展演化除了与应变有关,还与应变率有关。本文还阐明了这种材料在两个相互垂直加载方向上的应变率效应,对这两个方向在不同加载条件下的破坏机制进行了分析。
|
| 关 键 词： | 分离式Hopkinson压杆 应变率效应 损伤 长玻璃纤维/聚丙烯复合材料 |
| 文章编号： | 1673-9639（2007）02-0087-04 |
| 修稿时间： | 2006-12-24 |
SHPB Experiment and Dynamic Properties of GFPP |
| |
| DENG Xiao-qing,CAI Ai-jun,ZHANG Lei.SHPB Experiment and Dynamic Properties of GFPP[J].Journal of Tongren University,2007,1(2):87-90. |
| |
| Authors: | DENG Xiao-qing CAI Ai-jun ZHANG Lei |
| |
| Institution: | 1.Department of Physics and Electronic Science, Changsha University of Science and Technology, Changsha, Hunan 410076,China; 2. Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui 230027, China |
| |
| Abstract: | The mechanical properties of GFPP at different strain rates are studied by using of split Hopkinson bar(SHPB) in the paper.The dynamic stress-strain curves indicate that GFPP is a kind of typical visco-elastic material and has distinct strain-rate effect.GFPP also has distinct anisotropies under impact compressive load.The farther studies show that the anisotropies is resulted from not only the mode of glass fibers array and layer but also the development and evolvement of damage due to the micro-crack and micro-void in specimen.As the result of the development of damage,the material may be softened and be fractured.The development and evolvement of damage is related to strain and strain-rate of material.The strain-rate effect and the failure mechanism of material loaded from two orthogonal directions and under different load condition are discussed also. |
| |
| Keywords: | Split Hopkinson pressure bar(SHPB) Damage Strain-rate effect GFPP |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
