材料工程2019，Vol.47Issue(3)：15-22,8.DOI:10.11868/j.issn.1001-4381.2017.001457
石墨烯及碳化硅增强铝基复合材料的冲击力学行为
Mechanical behavior of graphene or SiC reinforced aluminum matrix composites under dynamic loading
杨宇凯 1张宝 1王旭东 1张虎生 2武岳 1关永军1
作者信息
- 1. 中国航发北京航空材料研究院,北京 100095
- 2. 中国科学院力学研究所,北京 100080
- 折叠
摘要
Abstract
Quasi-static compression experiments on graphene-reinforced aluminum matrix composites were carried out by means of microcomputer controlled electronic universal testing machine, while dynamic behavior of the composites at various high strain rates was determined by split hopkinson pressure bar (SHPB) . In addition, scanning electron microscopy (SEM) was employed to examine the morphological feature of aluminum matrix composites reinforced respectively by grapheme and SiC. The results show that at all strain rate, the yield strength of aluminum is improved both with addition of graphene and SiC, by incorporation of graphene, the yield strength of aluminum is improved more significantly, but without affecting the strain hardening rate of the material. In comparison with SiC as reinforcements, use of graphene undermines strain rate sensitivity of the composites, and meanwhile results in a decline in ultimate strength. J-C and Z-A constitutive models were fitted respectively to the experimental results to obtain relative parameters. Comparison between the two models suggests that J-C model is more accurate in terms of describing stress-strain behavior of both composites reinforced respectively by graphene and SiC.关键词
冲击力学/石墨烯/碳化硅/铝基复合材料/本构模型Key words
impact mechanics/graphene/SiC/aluminum matrix composite/constitutive model分类
通用工业技术引用本文复制引用
杨宇凯,张宝,王旭东,张虎生,武岳,关永军..石墨烯及碳化硅增强铝基复合材料的冲击力学行为[J].材料工程,2019,47(3):15-22,8.
