Thermo-chemo-mechanical modeling of residual stress in unidirectional carbon fiber-reinforced polymers during manufacture
The application of carbon fiber-reinforced composite materials in marine engineering is growing steadily. The mechanical properties of unbonded flexible risers using composite tensile armor wire are highly valued. However, the curing process generates a certain amount of internal residual stress. We...
| 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/10356/180600 |
| _version_ | 1826112786867945472 |
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| author | Bao, Rui Liu, Junpeng Xiao, Zhongmin Joshi, Sunil Chandrakant |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Bao, Rui Liu, Junpeng Xiao, Zhongmin Joshi, Sunil Chandrakant |
| author_sort | Bao, Rui |
| collection | NTU |
| description | The application of carbon fiber-reinforced composite materials in marine engineering is growing steadily. The mechanical properties of unbonded flexible risers using composite tensile armor wire are highly valued. However, the curing process generates a certain amount of internal residual stress. We present a detailed analysis of epoxy resin laminates to assess the impact of thermal, chemical, and mechanical effects on the curing stress and strain. An empirical model that correlates temperature and degree of cure was developed to precisely fit the elastic modulus data of the curing resin. The chemical kinetics of the epoxy resin system was characterized using differential scanning calorimetry (DSC), while the tensile relaxation modulus was determined through a dynamic mechanical analysis. The viscoelastic model was calibrated using the elastic modulus data of the cured resin combining temperature and degree of the curing (thermochemical kinetics) responses. Based on the principle of time–temperature superposition, the displacement factor and relaxation behavior of the material were also accurately captured by employing the same principle of time–temperature superposition. Utilizing the empirical model for degree of cure and modulus, we predicted micro-curing-induced strains in cured composite materials, which were then validated with experimental observations. |
| first_indexed | 2025-03-09T10:41:03Z |
| format | Journal Article |
| id | ntu-10356/180600 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-03-09T10:41:03Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1806002024-10-19T16:48:55Z Thermo-chemo-mechanical modeling of residual stress in unidirectional carbon fiber-reinforced polymers during manufacture Bao, Rui Liu, Junpeng Xiao, Zhongmin Joshi, Sunil Chandrakant School of Mechanical and Aerospace Engineering Engineering Composite processing Epoxy prepreg The application of carbon fiber-reinforced composite materials in marine engineering is growing steadily. The mechanical properties of unbonded flexible risers using composite tensile armor wire are highly valued. However, the curing process generates a certain amount of internal residual stress. We present a detailed analysis of epoxy resin laminates to assess the impact of thermal, chemical, and mechanical effects on the curing stress and strain. An empirical model that correlates temperature and degree of cure was developed to precisely fit the elastic modulus data of the curing resin. The chemical kinetics of the epoxy resin system was characterized using differential scanning calorimetry (DSC), while the tensile relaxation modulus was determined through a dynamic mechanical analysis. The viscoelastic model was calibrated using the elastic modulus data of the cured resin combining temperature and degree of the curing (thermochemical kinetics) responses. Based on the principle of time–temperature superposition, the displacement factor and relaxation behavior of the material were also accurately captured by employing the same principle of time–temperature superposition. Utilizing the empirical model for degree of cure and modulus, we predicted micro-curing-induced strains in cured composite materials, which were then validated with experimental observations. Published version This study is supported by the China Scholarship Council [CSC No.202206560023]. 2024-10-14T07:00:01Z 2024-10-14T07:00:01Z 2024 Journal Article Bao, R., Liu, J., Xiao, Z. & Joshi, S. C. (2024). Thermo-chemo-mechanical modeling of residual stress in unidirectional carbon fiber-reinforced polymers during manufacture. Materials, 17(12), 3040-. https://dx.doi.org/10.3390/ma17123040 1996-1944 https://hdl.handle.net/10356/180600 10.3390/ma17123040 2-s2.0-85197262895 12 17 3040 en Materials © 2024 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 Composite processing Epoxy prepreg Bao, Rui Liu, Junpeng Xiao, Zhongmin Joshi, Sunil Chandrakant Thermo-chemo-mechanical modeling of residual stress in unidirectional carbon fiber-reinforced polymers during manufacture |
| title | Thermo-chemo-mechanical modeling of residual stress in unidirectional carbon fiber-reinforced polymers during manufacture |
| title_full | Thermo-chemo-mechanical modeling of residual stress in unidirectional carbon fiber-reinforced polymers during manufacture |
| title_fullStr | Thermo-chemo-mechanical modeling of residual stress in unidirectional carbon fiber-reinforced polymers during manufacture |
| title_full_unstemmed | Thermo-chemo-mechanical modeling of residual stress in unidirectional carbon fiber-reinforced polymers during manufacture |
| title_short | Thermo-chemo-mechanical modeling of residual stress in unidirectional carbon fiber-reinforced polymers during manufacture |
| title_sort | thermo chemo mechanical modeling of residual stress in unidirectional carbon fiber reinforced polymers during manufacture |
| topic | Engineering Composite processing Epoxy prepreg |
| url | https://hdl.handle.net/10356/180600 |
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