Quasi-static tensile behavior and failure mechanism of laminated puncture CF/Al composites

SHEN Gaofeng; WANG Zhenjun; LIU Fenghua; ZHANG Yingfeng; CAI Changchun; XU Zhifeng; YU Huan

doi:10.7527/S1000-6893.2020.24816

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2021 , Vol. 42 >Issue 12: 424816 - 424816

DOI: https://doi.org/10.7527/S1000-6893.2020.24816

Material Engineering and Mechanical Manufacturing

Quasi-static tensile behavior and failure mechanism of laminated puncture CF/Al composites

SHEN Gaofeng ,
WANG Zhenjun ,
LIU Fenghua ,
ZHANG Yingfeng ,
CAI Changchun ,
XU Zhifeng ,
YU Huan

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1. School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China;
2. School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China

Received date: 2020-10-09

Revised date: 2020-11-10

Online published: 2020-12-31

Supported by

National Natural Science Foundation of China (51765045, 52165018); Aeronautical Science Foundation of China (2019ZF056013); Jiangxi Provincial Natural Science Foundation (20202ACBL204010); National Defense Basic Scientific Research Program of China (JCKY2018401C004)

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Abstract

A novel aluminum matrix composite reinforced with laminated puncture carbon fiber fabric (CF/Al composites) was prepared. The progressive damage and mechanical behavior of the composite subjected to quasi-static tensile loading were investigated by using test and micromechanical simulation method. The test results show that the tensile modulus, ultimate strength and fracture strain are 129.61 GPa, 630.14 MPa, and 0.75%, respectively, and the calculation errors of the above property parameters are -9.41%, 7.57% and 1.33%, respectively. The macroscopic stress-strain curve from the micromechanical simulation agrees well with the test result. At the initial tensile stage, local damages were found in the matrix alloy located between the warp and weft yarns. With the increase of tensile strain, these damage zones accumulated gradually and led to the transverse cracking of weft yarns and piercing yarns in sequence. Thereafter, the warp yarns and matrix alloy failed successively, leading to dramatical dropping of the macroscopic stress-strain curve at the final tensile stage. The tensile fracture morphology was characterized by coexistence of fracture of warp yarns and transverse cracking of weft and piercing yarns. The axial fracture of warp yarns, which was induced by fiber pulling-out and matrix tearing, was the dominant failure mechanism of the composites under the condition of warp-directional tensile loading.

Key words： laminated puncture structure; aluminum matrix composite; micromechanics; damage evolution; mechanical property; failure mechanism

Cite this article

SHEN Gaofeng , WANG Zhenjun , LIU Fenghua , ZHANG Yingfeng , CAI Changchun , XU Zhifeng , YU Huan . Quasi-static tensile behavior and failure mechanism of laminated puncture CF/Al composites[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021 , 42(12) : 424816 -424816 . DOI: 10.7527/S1000-6893.2020.24816

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