Displacement rate effects on mixed-mode I/II delamination of laminated carbon/epoxy composites
Mixed-mode delamination is one of the common failures of composites which has not been studied under low-impact loading. This paper studies the influence of displacement rate on mixed-mode I/II delamination of unidirectional carbon/epoxy composites. Single leg bending test is performed at displaceme...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Published: |
2022
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| Online Access: | http://hdl.handle.net/20.500.11937/87852 |
| _version_ | 1848764941941604352 |
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| author | Low, K Johar, M Sung, Aun Naa Nasir, M Koloor, S Petrů, M Israr, H Wong, K |
| author_facet | Low, K Johar, M Sung, Aun Naa Nasir, M Koloor, S Petrů, M Israr, H Wong, K |
| author_sort | Low, K |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Mixed-mode delamination is one of the common failures of composites which has not been studied under low-impact loading. This paper studies the influence of displacement rate on mixed-mode I/II delamination of unidirectional carbon/epoxy composites. Single leg bending test is performed at displacement rates of 1, 10, 100, and 500 mm/min. Experimental results reveal that the mixed-mode I/II fracture toughness is invariant with the displacement rate. In addition, scanning electron micrographs shows that shear cusps are more obvious at 1, 10, and 100 mm/min. At 500 mm/min, significant matrix debris is noticed. Furthermore, the proposed three-dimensional rate-dependent fracture criterion is found to well predict the fracture toughness. Numerical simulation using cohesive zone model suggests that the lower numerical peak load is due to lower damage dissipated energy. In addition, the theoretical and numerical traction-separation responses show significant differences, which is also reflected in the numerical phase angle. This implies that the local mixed-mode ratio is not constant throughout the simulation process. |
| first_indexed | 2025-11-14T11:27:22Z |
| format | Journal Article |
| id | curtin-20.500.11937-87852 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:27:22Z |
| publishDate | 2022 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-878522022-04-04T07:26:02Z Displacement rate effects on mixed-mode I/II delamination of laminated carbon/epoxy composites Low, K Johar, M Sung, Aun Naa Nasir, M Koloor, S Petrů, M Israr, H Wong, K Mixed-mode delamination is one of the common failures of composites which has not been studied under low-impact loading. This paper studies the influence of displacement rate on mixed-mode I/II delamination of unidirectional carbon/epoxy composites. Single leg bending test is performed at displacement rates of 1, 10, 100, and 500 mm/min. Experimental results reveal that the mixed-mode I/II fracture toughness is invariant with the displacement rate. In addition, scanning electron micrographs shows that shear cusps are more obvious at 1, 10, and 100 mm/min. At 500 mm/min, significant matrix debris is noticed. Furthermore, the proposed three-dimensional rate-dependent fracture criterion is found to well predict the fracture toughness. Numerical simulation using cohesive zone model suggests that the lower numerical peak load is due to lower damage dissipated energy. In addition, the theoretical and numerical traction-separation responses show significant differences, which is also reflected in the numerical phase angle. This implies that the local mixed-mode ratio is not constant throughout the simulation process. 2022 Journal Article http://hdl.handle.net/20.500.11937/87852 http://creativecommons.org/licenses/by-nc-nd/4.0/ fulltext |
| spellingShingle | Low, K Johar, M Sung, Aun Naa Nasir, M Koloor, S Petrů, M Israr, H Wong, K Displacement rate effects on mixed-mode I/II delamination of laminated carbon/epoxy composites |
| title | Displacement rate effects on mixed-mode I/II delamination of laminated carbon/epoxy composites |
| title_full | Displacement rate effects on mixed-mode I/II delamination of laminated carbon/epoxy composites |
| title_fullStr | Displacement rate effects on mixed-mode I/II delamination of laminated carbon/epoxy composites |
| title_full_unstemmed | Displacement rate effects on mixed-mode I/II delamination of laminated carbon/epoxy composites |
| title_short | Displacement rate effects on mixed-mode I/II delamination of laminated carbon/epoxy composites |
| title_sort | displacement rate effects on mixed-mode i/ii delamination of laminated carbon/epoxy composites |
| url | http://hdl.handle.net/20.500.11937/87852 |