Tension-compression fatigue induced stress concentrations in woven composite laminate
Tension-compression (T-C) fatigue response is one of the important design criteria for carbon-fibre-reinforced polymer (CFRP) material, as well as stress concentration. Hence, the objective of the current study is to investigate and quantify the stress concentration in CFRP dog-bone specimens due to...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/179126 |
| _version_ | 1826119158318759936 |
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| author | Mathew, Eldho Nandagopal, Rajaram Attukur Joshi, Sunil Chandrakant Armando, Pinter Matteo, Pasi |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Mathew, Eldho Nandagopal, Rajaram Attukur Joshi, Sunil Chandrakant Armando, Pinter Matteo, Pasi |
| author_sort | Mathew, Eldho |
| collection | NTU |
| description | Tension-compression (T-C) fatigue response is one of the important design criteria for carbon-fibre-reinforced polymer (CFRP) material, as well as stress concentration. Hence, the objective of the current study is to investigate and quantify the stress concentration in CFRP dog-bone specimens due to T-C quasi-static and fatigue loadings (with anti-buckling fixtures). Dog-bone specimens with a [(0/90),(45/−45)4]s layup were fabricated using woven CFRP prepregs and their low-cycle fatigue behaviour was studied at two stress ratios (−0.1 & −0.5) and two frequencies (3 Hz & 5 Hz). During testing, strain gauges were mounted at the centre and edge regions of the dog-bone specimens to obtain accurate, real-time strain measurements. The corresponding stresses were calculated using Young’s moduli. The stress concentration at the specimen edges, due to quasi-static tension, was significant compared to quasi-static compression loads. Furthermore, the stress concentration increased with the quasi-static loading within the elastic limit. Similarly, the stress concentration at the specimen edges, due to tensile fatigue loads, was more significant and consistent than due to compressive fatigue loads. Finally, the effects of the stress ratio and loading frequency on the stress concentration were noted to be negligible. |
| first_indexed | 2024-10-01T04:55:30Z |
| format | Journal Article |
| id | ntu-10356/179126 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:55:30Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1791262024-07-20T16:48:20Z Tension-compression fatigue induced stress concentrations in woven composite laminate Mathew, Eldho Nandagopal, Rajaram Attukur Joshi, Sunil Chandrakant Armando, Pinter Matteo, Pasi School of Mechanical and Aerospace Engineering Engineering Tension-compression fatigue Carbon fibre reinforced polymer Tension-compression (T-C) fatigue response is one of the important design criteria for carbon-fibre-reinforced polymer (CFRP) material, as well as stress concentration. Hence, the objective of the current study is to investigate and quantify the stress concentration in CFRP dog-bone specimens due to T-C quasi-static and fatigue loadings (with anti-buckling fixtures). Dog-bone specimens with a [(0/90),(45/−45)4]s layup were fabricated using woven CFRP prepregs and their low-cycle fatigue behaviour was studied at two stress ratios (−0.1 & −0.5) and two frequencies (3 Hz & 5 Hz). During testing, strain gauges were mounted at the centre and edge regions of the dog-bone specimens to obtain accurate, real-time strain measurements. The corresponding stresses were calculated using Young’s moduli. The stress concentration at the specimen edges, due to quasi-static tension, was significant compared to quasi-static compression loads. Furthermore, the stress concentration increased with the quasi-static loading within the elastic limit. Similarly, the stress concentration at the specimen edges, due to tensile fatigue loads, was more significant and consistent than due to compressive fatigue loads. Finally, the effects of the stress ratio and loading frequency on the stress concentration were noted to be negligible. Published version 2024-07-19T01:00:17Z 2024-07-19T01:00:17Z 2021 Journal Article Mathew, E., Nandagopal, R. A., Joshi, S. C., Armando, P. & Matteo, P. (2021). Tension-compression fatigue induced stress concentrations in woven composite laminate. Journal of Composites Science, 5(11), 297-. https://dx.doi.org/10.3390/jcs5110297 2504-477X https://hdl.handle.net/10356/179126 10.3390/jcs5110297 2-s2.0-85119370179 11 5 297 en Journal of Composites Science © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). application/pdf |
| spellingShingle | Engineering Tension-compression fatigue Carbon fibre reinforced polymer Mathew, Eldho Nandagopal, Rajaram Attukur Joshi, Sunil Chandrakant Armando, Pinter Matteo, Pasi Tension-compression fatigue induced stress concentrations in woven composite laminate |
| title | Tension-compression fatigue induced stress concentrations in woven composite laminate |
| title_full | Tension-compression fatigue induced stress concentrations in woven composite laminate |
| title_fullStr | Tension-compression fatigue induced stress concentrations in woven composite laminate |
| title_full_unstemmed | Tension-compression fatigue induced stress concentrations in woven composite laminate |
| title_short | Tension-compression fatigue induced stress concentrations in woven composite laminate |
| title_sort | tension compression fatigue induced stress concentrations in woven composite laminate |
| topic | Engineering Tension-compression fatigue Carbon fibre reinforced polymer |
| url | https://hdl.handle.net/10356/179126 |
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