Rapid assessment of out-of-plane nonlinear shear stress–strain response for thick-section composites using artificial neural networks and DIC

Wei, Gaojian; Hao, Ziqing; Chen, Guangchang; Ke, Hongjun; Deng, Linlin; Liu, L.

doi:10.1016/j.compstruct.2023.116770

Cited by 2 publications

(2 citation statements)

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“…Spray white matte primer on laminate laps before stretching, and spray the black scattering after the primer has completely solidified to form random patterns on the surface. [34][35][36] The Vic-Snap9 software was used to capture real-time surface out-of-plane displacement and surface principal strain in the frontal view of the screwed joint. Two 12 M industrial cameras were used to acquire the images and the sampling rate of the cameras was set to capture images every 500 ms. Photographs were captured at the beginning of the tensile test until failure of the specimen occurred.…”

Section: Experimental Set Upmentioning

confidence: 99%

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Study of the tensile mechanical properties and failure mechanisms of CFRP screwed joints

He,

Yang,

Liu

et al. 2024

Journal of Composite Materials

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Removable joint technology is commonly used in composite laminates for various load-bearing structures. However, existing research primarily focuses on bolted joints, there is relatively limited research on screwed joints in composite materials. This study investigates the influence of connected layer thickness and hole diameter on the tensile behavior of threaded joints in carbon fiber-reinforced polymer (CFRP) laminates. After fabricating different CFRP screwed joint specimens, tensile tests were conducted. The digital image correlation (DIC) technique captured the deformation process. The experiment results indicate a significant increase in load-bearing capacity with the increase in diameter. For instance, joints with an 8 mm diameter exhibited a load-bearing capacity of 10.82 kN. The increase in the connected layer thickness correspondingly enhanced the load-bearing capacity of the joint. The joint with a thickness of 7 mm had the highest load-bearing capacity of 8.83 kN. Besides, with the increase in the thickness of the connected layer, the failure mode transitioned from shear failure in the connected layer to screw pull-out. The tilt angle of the screw during the pull-out process also decreases with the increase in the connected layer thickness. Strain and out-of-plane displacement measurements under ultimate load conditions verify these observations.

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Section: Experimental Set Upmentioning

confidence: 99%

“…Spray white matte primer on laminate laps before stretching, and spray the black scattering after the primer has completely solidified to form random patterns on the surface. 34–36…”

Section: Experimental Set Upmentioning

confidence: 99%