期刊
COMPOSITES PART B-ENGINEERING
卷 152, 期 -, 页码 96-101出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2018.06.025
关键词
Polymer composite; Strain rate; Dynamic compressive response; Deformation and fracture; Toughness
资金
- Beijing Institute of Technology Research Fund Program for Young Scholars
- Independent Research Project of State Key Laboratory of Explosion Science and Technology [QNKT17-03]
- Fundamental Research Funds for the Central Universities
- National Natural Science Foundation of China [11602024]
Compressive mechanical response of a developed polymer composite material over a wide strain rate range of 0.0001/s-8000/s is investigated. The developed polymer composite material shows the following stress-strain relation under high rate compressive loading: linear elasticity to a high yield stress, softening behavior with a slight stress decrease, plateau stress accompanied by a large plasticity and densification with a stress increase. Rate dependency of mechanical properties is revealed quantificationally, which follows a power law function. By designing the impact energy (or initial loading rate) in experimental tests conducted by split Hopkinson pressure bar (SHPB), the deformation-to-fracture process related with the inputted strain energy density or with deformation strain during a dynamic loading is observed through the post-test analyses. The ductile damage and brittle fracture characteristics as well as the tolerant cracking mechanisms are illustrated. This work is full of interest to develop a light-weight transparent protective polymer composite material against a high-speed impact loading.
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