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A platform for research: civil engineering, architecture and urbanism
Meso/macroscale study on the shear failure of CFRP laminates considering fibre rotation
https://orcid.org/0000-0003-0138-3536
https://orcid.org/0000-0001-6622-0688
Abstract The shear failure mechanisms of 45° braided and unidirectional carbon fibre reinforced polymer (CFRP) laminates are investigated. Off-axis tensile tests were carried out to determine the performance and failure modes of laminates with different numbers of layers. A mesoscale unit cell finite element model was established, and the simulation was validated. The results show that braided laminates and unidirectional laminates have different failure cracks. With the increase in the number of layers, the failure mode of laminates changes. For laminates with 8 or more layers, the necking effect appears at the fracture, and there is a fibre rotation strengthening stage in the stress–strain curve. The stress–strain response functions of laminates in the fibre rotation strengthening stage fitted according to test data can effectively reflect the properties of 45° braided and unidirectional CFRP laminates.
Highlights Carbon fibre reinforced polymer has complex off-axis tensile failure modes. Braided and unidirectional laminates have different failure cracks. The meso unit cell simulation and macro test data are consistent. Shear stress–strain response of laminates has a fibre rotation strengthening stage.
Meso/macroscale study on the shear failure of CFRP laminates considering fibre rotation
https://orcid.org/0000-0003-0138-3536
https://orcid.org/0000-0001-6622-0688
Abstract The shear failure mechanisms of 45° braided and unidirectional carbon fibre reinforced polymer (CFRP) laminates are investigated. Off-axis tensile tests were carried out to determine the performance and failure modes of laminates with different numbers of layers. A mesoscale unit cell finite element model was established, and the simulation was validated. The results show that braided laminates and unidirectional laminates have different failure cracks. With the increase in the number of layers, the failure mode of laminates changes. For laminates with 8 or more layers, the necking effect appears at the fracture, and there is a fibre rotation strengthening stage in the stress–strain curve. The stress–strain response functions of laminates in the fibre rotation strengthening stage fitted according to test data can effectively reflect the properties of 45° braided and unidirectional CFRP laminates.
Highlights Carbon fibre reinforced polymer has complex off-axis tensile failure modes. Braided and unidirectional laminates have different failure cracks. The meso unit cell simulation and macro test data are consistent. Shear stress–strain response of laminates has a fibre rotation strengthening stage.
Meso/macroscale study on the shear failure of CFRP laminates considering fibre rotation
https://orcid.org/0000-0003-0138-3536
https://orcid.org/0000-0001-6622-0688
Abstract The shear failure mechanisms of 45° braided and unidirectional carbon fibre reinforced polymer (CFRP) laminates are investigated. Off-axis tensile tests were carried out to determine the performance and failure modes of laminates with different numbers of layers. A mesoscale unit cell finite element model was established, and the simulation was validated. The results show that braided laminates and unidirectional laminates have different failure cracks. With the increase in the number of layers, the failure mode of laminates changes. For laminates with 8 or more layers, the necking effect appears at the fracture, and there is a fibre rotation strengthening stage in the stress–strain curve. The stress–strain response functions of laminates in the fibre rotation strengthening stage fitted according to test data can effectively reflect the properties of 45° braided and unidirectional CFRP laminates.
Highlights Carbon fibre reinforced polymer has complex off-axis tensile failure modes. Braided and unidirectional laminates have different failure cracks. The meso unit cell simulation and macro test data are consistent. Shear stress–strain response of laminates has a fibre rotation strengthening stage.
Meso/macroscale study on the shear failure of CFRP laminates considering fibre rotation
Zhuang, Weimin (author) / Chen, Shen (author) / Yang, Xiaowen (author) / Liu, Yang (author)
Thin-Walled Structures ; 181
2022-08-31
Article (Journal)
Electronic Resource
English
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