Shear-dominated interlaminar fracture process in CFRP composite laminates
This paper examines and quantifies the mechanics of damage processes leading to interlaminar fracture of composite laminates under shear-dominated loading. For this purpose a 16-ply unidirectional CFRP composite laminate specimen with end-notched flexural (ENF) geometry is tested in a 3-point bend t...
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| Format: | Conference or Workshop Item |
| Language: | English |
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2013
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| Online Access: | http://eprints.utm.my/38729/1/NorizahRedzuan2013_ShearDominatedInterlaminarFractureProcess.pdf |
| _version_ | 1796857746111332352 |
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| author | Koloor, Seyed Saeid Rahimian Redzuan, Norizah Tamin, Mohd. Nasir |
| author_facet | Koloor, Seyed Saeid Rahimian Redzuan, Norizah Tamin, Mohd. Nasir |
| author_sort | Koloor, Seyed Saeid Rahimian |
| collection | ePrints |
| description | This paper examines and quantifies the mechanics of damage processes leading to interlaminar fracture of composite laminates under shear-dominated loading. For this purpose a 16-ply unidirectional CFRP composite laminate specimen with end-notched flexural (ENF) geometry is tested in a 3-point bend test set-up. The initial crack length to span ratio is a/L = 0.325. The long span of 160 mm induces a gradual evolution of shear-dominated interlaminar damage and fracture. Finite element (FE) simulation of the test is performed with interlaminar cohesive behavior assumed for the midthickness pre-cracked interface. The measured load-deflection of the ENF specimen is used to validate the FE model with cohesive interface. Hypothetical elastic CFRP composite beams with and without interlaminar edge crack are also modelled as reference cases. Results show that the initial crack reduces flexural stiffness by 30.2 pct. with insignificant lamina damage. Interlaminar shear stress and the corresponding shear energy release rate govern the interlaminar fracture process in the cohesive zone. A cohesive zone length of 2.2 mm with maximum relative shear displacement of 0.023 mm is predicted at the onset of interlaminar fracture. The rate of energy dissipation due to interlaminar damage accelerates to 3.75 N.mm/sec in the final. |
| first_indexed | 2024-03-05T19:02:24Z |
| format | Conference or Workshop Item |
| id | utm.eprints-38729 |
| institution | Universiti Teknologi Malaysia - ePrints |
| language | English |
| last_indexed | 2024-03-05T19:02:24Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | utm.eprints-387292017-10-23T04:49:43Z http://eprints.utm.my/38729/ Shear-dominated interlaminar fracture process in CFRP composite laminates Koloor, Seyed Saeid Rahimian Redzuan, Norizah Tamin, Mohd. Nasir TJ Mechanical engineering and machinery This paper examines and quantifies the mechanics of damage processes leading to interlaminar fracture of composite laminates under shear-dominated loading. For this purpose a 16-ply unidirectional CFRP composite laminate specimen with end-notched flexural (ENF) geometry is tested in a 3-point bend test set-up. The initial crack length to span ratio is a/L = 0.325. The long span of 160 mm induces a gradual evolution of shear-dominated interlaminar damage and fracture. Finite element (FE) simulation of the test is performed with interlaminar cohesive behavior assumed for the midthickness pre-cracked interface. The measured load-deflection of the ENF specimen is used to validate the FE model with cohesive interface. Hypothetical elastic CFRP composite beams with and without interlaminar edge crack are also modelled as reference cases. Results show that the initial crack reduces flexural stiffness by 30.2 pct. with insignificant lamina damage. Interlaminar shear stress and the corresponding shear energy release rate govern the interlaminar fracture process in the cohesive zone. A cohesive zone length of 2.2 mm with maximum relative shear displacement of 0.023 mm is predicted at the onset of interlaminar fracture. The rate of energy dissipation due to interlaminar damage accelerates to 3.75 N.mm/sec in the final. 2013 Conference or Workshop Item PeerReviewed application/pdf en http://eprints.utm.my/38729/1/NorizahRedzuan2013_ShearDominatedInterlaminarFractureProcess.pdf Koloor, Seyed Saeid Rahimian and Redzuan, Norizah and Tamin, Mohd. Nasir (2013) Shear-dominated interlaminar fracture process in CFRP composite laminates. In: 9th International Conference on Fracture & Strength of Solids, 9-13 Jun 2013, Jeju, South Korea. |
| spellingShingle | TJ Mechanical engineering and machinery Koloor, Seyed Saeid Rahimian Redzuan, Norizah Tamin, Mohd. Nasir Shear-dominated interlaminar fracture process in CFRP composite laminates |
| title | Shear-dominated interlaminar fracture process in CFRP composite laminates |
| title_full | Shear-dominated interlaminar fracture process in CFRP composite laminates |
| title_fullStr | Shear-dominated interlaminar fracture process in CFRP composite laminates |
| title_full_unstemmed | Shear-dominated interlaminar fracture process in CFRP composite laminates |
| title_short | Shear-dominated interlaminar fracture process in CFRP composite laminates |
| title_sort | shear dominated interlaminar fracture process in cfrp composite laminates |
| topic | TJ Mechanical engineering and machinery |
| url | http://eprints.utm.my/38729/1/NorizahRedzuan2013_ShearDominatedInterlaminarFractureProcess.pdf |
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