Displacement Rate Effects on the Mode II Shear Delamination Behavior of Carbon Fiber/Epoxy Composites
This paper studies the influence of displacement rate on mode II delamination of unidirectional carbon/epoxy composites. End-notched flexure test is performed at displacement rates of 1, 10, 100 and 500 mm/min. Experimental results reveal that the mode II fracture toughness <i>G<sub>IIC&...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-06-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/13/11/1881 |
| _version_ | 1797531275523784704 |
|---|---|
| author | Kean Ong Low Mahzan Johar Haris Ahmad Israr Khong Wui Gan Seyed Saeid Rahimian Koloor Michal Petrů King Jye Wong |
| author_facet | Kean Ong Low Mahzan Johar Haris Ahmad Israr Khong Wui Gan Seyed Saeid Rahimian Koloor Michal Petrů King Jye Wong |
| author_sort | Kean Ong Low |
| collection | DOAJ |
| description | This paper studies the influence of displacement rate on mode II delamination of unidirectional carbon/epoxy composites. End-notched flexure test is performed at displacement rates of 1, 10, 100 and 500 mm/min. Experimental results reveal that the mode II fracture toughness <i>G<sub>IIC</sub></i> increases with the displacement, with a maximum increment of 45% at 100 mm/min. In addition, scanning electron micrographs depict that fiber/matrix interface debonding is the major damage mechanism at 1 mm/min. At higher speeds, significant matrix-dominated shear cusps are observed contributing to higher <i>G<sub>IIC</sub></i>. Besides, it is demonstrated that the proposed rate-dependent model is able to fit the experimental data from the current study and the open literature generally well. The mode II fracture toughness measured from the experiment or deduced from the proposed model can be used in the cohesive element model to predict failure. Good agreement is found between the experimental and numerical results, with a maximum difference of 10%. The numerical analyses indicate crack jump occurs suddenly after the peak load is attained, which leads to the unstable crack propagation seen in the experiment. |
| first_indexed | 2024-03-10T10:40:34Z |
| format | Article |
| id | doaj.art-f6f0848ba29845538785fbb98ff79995 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T10:40:34Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-f6f0848ba29845538785fbb98ff799952023-11-21T22:59:12ZengMDPI AGPolymers2073-43602021-06-011311188110.3390/polym13111881Displacement Rate Effects on the Mode II Shear Delamination Behavior of Carbon Fiber/Epoxy CompositesKean Ong Low0Mahzan Johar1Haris Ahmad Israr2Khong Wui Gan3Seyed Saeid Rahimian Koloor4Michal Petrů5King Jye Wong6School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai 81310, Johor, MalaysiaFaculty of Engineering and Science, Curtin University Malaysia, Miri 98009, Sarawak, MalaysiaSchool of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai 81310, Johor, MalaysiaSchool of Engineering, University of Southampton Malaysia, Kota Ilmu Educity @ Iskandar, Iskandar Puteri 79200, Johor, MalaysiaInstitute for Nanomaterials, Advanced Technologies and Innovation (CXI), Technical University of Liberec (TUL), Studentska 2, 461 17 Liberec, Czech RepublicTechnical University of Liberec (TUL), Studentska 2, 461 17 Liberec, Czech RepublicSchool of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai 81310, Johor, MalaysiaThis paper studies the influence of displacement rate on mode II delamination of unidirectional carbon/epoxy composites. End-notched flexure test is performed at displacement rates of 1, 10, 100 and 500 mm/min. Experimental results reveal that the mode II fracture toughness <i>G<sub>IIC</sub></i> increases with the displacement, with a maximum increment of 45% at 100 mm/min. In addition, scanning electron micrographs depict that fiber/matrix interface debonding is the major damage mechanism at 1 mm/min. At higher speeds, significant matrix-dominated shear cusps are observed contributing to higher <i>G<sub>IIC</sub></i>. Besides, it is demonstrated that the proposed rate-dependent model is able to fit the experimental data from the current study and the open literature generally well. The mode II fracture toughness measured from the experiment or deduced from the proposed model can be used in the cohesive element model to predict failure. Good agreement is found between the experimental and numerical results, with a maximum difference of 10%. The numerical analyses indicate crack jump occurs suddenly after the peak load is attained, which leads to the unstable crack propagation seen in the experiment.https://www.mdpi.com/2073-4360/13/11/1881carbon/epoxy compositeMode II delaminationcohesive zone modeldisplacement ratefractography |
| spellingShingle | Kean Ong Low Mahzan Johar Haris Ahmad Israr Khong Wui Gan Seyed Saeid Rahimian Koloor Michal Petrů King Jye Wong Displacement Rate Effects on the Mode II Shear Delamination Behavior of Carbon Fiber/Epoxy Composites Polymers carbon/epoxy composite Mode II delamination cohesive zone model displacement rate fractography |
| title | Displacement Rate Effects on the Mode II Shear Delamination Behavior of Carbon Fiber/Epoxy Composites |
| title_full | Displacement Rate Effects on the Mode II Shear Delamination Behavior of Carbon Fiber/Epoxy Composites |
| title_fullStr | Displacement Rate Effects on the Mode II Shear Delamination Behavior of Carbon Fiber/Epoxy Composites |
| title_full_unstemmed | Displacement Rate Effects on the Mode II Shear Delamination Behavior of Carbon Fiber/Epoxy Composites |
| title_short | Displacement Rate Effects on the Mode II Shear Delamination Behavior of Carbon Fiber/Epoxy Composites |
| title_sort | displacement rate effects on the mode ii shear delamination behavior of carbon fiber epoxy composites |
| topic | carbon/epoxy composite Mode II delamination cohesive zone model displacement rate fractography |
| url | https://www.mdpi.com/2073-4360/13/11/1881 |
| work_keys_str_mv | AT keanonglow displacementrateeffectsonthemodeiisheardelaminationbehaviorofcarbonfiberepoxycomposites AT mahzanjohar displacementrateeffectsonthemodeiisheardelaminationbehaviorofcarbonfiberepoxycomposites AT harisahmadisrar displacementrateeffectsonthemodeiisheardelaminationbehaviorofcarbonfiberepoxycomposites AT khongwuigan displacementrateeffectsonthemodeiisheardelaminationbehaviorofcarbonfiberepoxycomposites AT seyedsaeidrahimiankoloor displacementrateeffectsonthemodeiisheardelaminationbehaviorofcarbonfiberepoxycomposites AT michalpetru displacementrateeffectsonthemodeiisheardelaminationbehaviorofcarbonfiberepoxycomposites AT kingjyewong displacementrateeffectsonthemodeiisheardelaminationbehaviorofcarbonfiberepoxycomposites |