Shear stability test and strength prediction of composite laminates

YANG Junchao; CHEN Xiangming; ZOU Peng; WANG Zhe

doi:10.13801/j.cnki.fhclxb.20220530.002

Volume 40 Issue 3

Mar. 2023

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YANG Junchao, CHEN Xiangming, ZOU Peng, et al. Shear stability test and strength prediction of composite laminates[J]. Acta Materiae Compositae Sinica, 2023, 40(3): 1707-1717. doi: 10.13801/j.cnki.fhclxb.20220530.002

Citation:

YANG Junchao, CHEN Xiangming, ZOU Peng, et al. Shear stability test and strength prediction of composite laminates[J]. Acta Materiae Compositae Sinica, 2023, 40(3): 1707-1717. doi: 10.13801/j.cnki.fhclxb.20220530.002

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Shear stability test and strength prediction of composite laminates

doi: 10.13801/j.cnki.fhclxb.20220530.002

Aeronautics Science and Technology Key Laboratory of Full Scale Aircraft Structure and Fatigue, Aircraft Strength Research Institute of China, Xi'an 710065, China

Funds: National Key R & D Program of China (2019 YFA0706800); National Natural Science Foundation of China (52005458); Aviation Science Foundation of China (2020 Z055023002)

Received Date: 2022-02-28
Accepted Date: 2022-05-20
Rev Recd Date: 2022-05-10

Available Online: 2022-05-31

Publish Date: 2023-03-15

Abstract

Abstract

The shear stability tests of composite laminates without damage and with impact damage were carried out. The post buckling behavior of composite laminates was measured in real time based on digital image correlation (DIC). The test results show that after the introduction of impact damage, the shear buckling waveform and buckling load of composite laminates do not change significantly, and the failure mode changes, the bearing capacity decreased by 9.69%. Then, based on the fracture surface failure theory, a progressive damage failure model of composite materials considering shear nonlinear effect was established, and the shear failure process of composite laminates was simulated. The softened inclusion method was used to simplify the impact damage, and the geometric boundary information of the damage area was directly written into the material model. There was no need to cut the impact damage area, so as to ensure the overall grid quality. Compared with the experimental results, it is found that the model considering shear nonlinearity has no obvious influence on the prediction of buckling load, and has a great influence on the prediction accuracy of post buckling capacity. The error without considering shear nonlinearity can reach more than 20%; The softened inclusion method can effectively simulate the impact damage. The predicted buckling load and failure load errors of composite laminates with impact damage are −3.17% and −1.27% respectively.
- composite laminates,
- impact damage,
- digital image correlation,
- shear nonlinearity behavior,
- buckling,
- post buckling
Long Abstrsct
Innovation Points

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References(31)

References

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