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High Strain Rate Effect on Tensile and Compressive Property of Carbon Fiber Reinforced Composites

Authors :
Jing Sun
Lina Feng
Mingfa Ren
Fei Weng
Yingying Fang
Source :
Science of Advanced Materials. 13:310-320
Publication Year :
2021
Publisher :
American Scientific Publishers, 2021.

Abstract

With high strength and stiffness-to-weight ratios, Carbon-Fiber-Reinforced Polymer (CFRP) composite has been applied to the separation device of the rocket by shaped charge jet. But dynamic tensile and compressive properties of CFRP under high rate strain are still unclear. In the article, tensile testing along transverse direction are conducted. The quasi-static tests (10-3 s-1) use a universal testing machine and high dynamic loadings of 800 s-1 and 1600 s-1 tests adopt a high-speed tensile testing machine. Meanwhile, dynamic compressive tests of unidirectional and cross-ply laminated specimen under the thickness direction loading are implemented by a Split Hopkinson Pressure Bar (SHPB) from dynamic loading 500 s-1 to 2500 s-1. Test results show that compared with static tests data, both transverse tensile modulus and strength of CFRP composites materials at dynamic loadings are sensitive to tensile tests. The compressive peak stress and stiffness of specimens also have an increasing tendency with the increases of the strain rate. Furthermore, for failure mode of tensile specimens, the crack propagation of the specimen fracture is along the interface of the fiber/matrix under all loading conditions. The failure modes of compressive specimens are different as the strain rate changes. The higher the strain rate, the more severe the crushing.

Details

ISSN :
19472935
Volume :
13
Database :
OpenAIRE
Journal :
Science of Advanced Materials
Accession number :
edsair.doi...........34969dd1c0c1dbb9d3bf1eaa311cd1b2
Full Text :
https://doi.org/10.1166/sam.2021.3867