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A comparative study on failure mechanisms of open-hole and filled-hole composite laminates: Experiment and numerical simulation
https://orcid.org/0000-0002-9661-7237
https://orcid.org/0000-0003-0584-3894
https://orcid.org/0009-0007-9910-6209
https://orcid.org/0000-0002-6129-0668
Highlights The model developed can accurately predict the damage patterns and load–displacement responses of open hole and filled hole laminates, with the deviations to the measured failure load within 6 %. FHC laminate exhibits both longitudinal and transverse fibre damage, and the delamination damage is significantly reduced compared to OHC laminate. The load carrying capacity of FHT laminate increases by 10.76 % compared to OHT laminates, and the capacity of FHC laminate increases by 35.97 % compared to OHC laminates. The increase of friction between bolt and laminate will effectively retard the propagation of matrix cracks. The results provide useful information to assist the design of the relevant composite structures.
Abstract The strength of composites with open holes (OH) and filled holes (FH) is a critical factor in determining mechanical allowances for engineering design. This study employs both experimental and numerical analyses to investigate the mechanical behaviour of composite laminates subjected to open-hole tension (OHT) and open-hole compression (OHC), filled-hole tension (FHT) and filled-hole compression (FHC). A progressive damage model (PDM) has been developed to predict the load-carrying capacity of both OH and FH laminates, with deviations lower than 6 % in comparison to the corresponding experimental results. Results indicate that OHC/FHC laminates experience more pronounced damage compared to OHT/FHT laminates prior to the maximum load. Additionally, delamination in FHC laminates is significantly reduced compared to OHC laminates. In comparison to OHT/OHC laminates, the presence of a filled bolt increases the maximum load of FHT/FHC laminates by 10.8 % and 36.0 %, respectively, due to relieving the stress concentration near the hole. Moreover, a higher contact friction coefficient between the bolt and laminate leads to a higher maximum load, particularly for FHC laminates, as the increased friction effectively hinders the matrix crack propagation. These findings provide valuable insights for assisting the design of composite structures.
A comparative study on failure mechanisms of open-hole and filled-hole composite laminates: Experiment and numerical simulation
https://orcid.org/0000-0002-9661-7237
https://orcid.org/0000-0003-0584-3894
https://orcid.org/0009-0007-9910-6209
https://orcid.org/0000-0002-6129-0668
Highlights The model developed can accurately predict the damage patterns and load–displacement responses of open hole and filled hole laminates, with the deviations to the measured failure load within 6 %. FHC laminate exhibits both longitudinal and transverse fibre damage, and the delamination damage is significantly reduced compared to OHC laminate. The load carrying capacity of FHT laminate increases by 10.76 % compared to OHT laminates, and the capacity of FHC laminate increases by 35.97 % compared to OHC laminates. The increase of friction between bolt and laminate will effectively retard the propagation of matrix cracks. The results provide useful information to assist the design of the relevant composite structures.
Abstract The strength of composites with open holes (OH) and filled holes (FH) is a critical factor in determining mechanical allowances for engineering design. This study employs both experimental and numerical analyses to investigate the mechanical behaviour of composite laminates subjected to open-hole tension (OHT) and open-hole compression (OHC), filled-hole tension (FHT) and filled-hole compression (FHC). A progressive damage model (PDM) has been developed to predict the load-carrying capacity of both OH and FH laminates, with deviations lower than 6 % in comparison to the corresponding experimental results. Results indicate that OHC/FHC laminates experience more pronounced damage compared to OHT/FHT laminates prior to the maximum load. Additionally, delamination in FHC laminates is significantly reduced compared to OHC laminates. In comparison to OHT/OHC laminates, the presence of a filled bolt increases the maximum load of FHT/FHC laminates by 10.8 % and 36.0 %, respectively, due to relieving the stress concentration near the hole. Moreover, a higher contact friction coefficient between the bolt and laminate leads to a higher maximum load, particularly for FHC laminates, as the increased friction effectively hinders the matrix crack propagation. These findings provide valuable insights for assisting the design of composite structures.
A comparative study on failure mechanisms of open-hole and filled-hole composite laminates: Experiment and numerical simulation
https://orcid.org/0000-0002-9661-7237
https://orcid.org/0000-0003-0584-3894
https://orcid.org/0009-0007-9910-6209
https://orcid.org/0000-0002-6129-0668
Highlights The model developed can accurately predict the damage patterns and load–displacement responses of open hole and filled hole laminates, with the deviations to the measured failure load within 6 %. FHC laminate exhibits both longitudinal and transverse fibre damage, and the delamination damage is significantly reduced compared to OHC laminate. The load carrying capacity of FHT laminate increases by 10.76 % compared to OHT laminates, and the capacity of FHC laminate increases by 35.97 % compared to OHC laminates. The increase of friction between bolt and laminate will effectively retard the propagation of matrix cracks. The results provide useful information to assist the design of the relevant composite structures.
Abstract The strength of composites with open holes (OH) and filled holes (FH) is a critical factor in determining mechanical allowances for engineering design. This study employs both experimental and numerical analyses to investigate the mechanical behaviour of composite laminates subjected to open-hole tension (OHT) and open-hole compression (OHC), filled-hole tension (FHT) and filled-hole compression (FHC). A progressive damage model (PDM) has been developed to predict the load-carrying capacity of both OH and FH laminates, with deviations lower than 6 % in comparison to the corresponding experimental results. Results indicate that OHC/FHC laminates experience more pronounced damage compared to OHT/FHT laminates prior to the maximum load. Additionally, delamination in FHC laminates is significantly reduced compared to OHC laminates. In comparison to OHT/OHC laminates, the presence of a filled bolt increases the maximum load of FHT/FHC laminates by 10.8 % and 36.0 %, respectively, due to relieving the stress concentration near the hole. Moreover, a higher contact friction coefficient between the bolt and laminate leads to a higher maximum load, particularly for FHC laminates, as the increased friction effectively hinders the matrix crack propagation. These findings provide valuable insights for assisting the design of composite structures.
A comparative study on failure mechanisms of open-hole and filled-hole composite laminates: Experiment and numerical simulation
Zhang, Di (Autor:in) / Zhou, Jin (Autor:in) / Wang, Jizhen (Autor:in) / Zhang, Wenxin (Autor:in) / Guan, Zhongwei (Autor:in)
Thin-Walled Structures ; 198
18.02.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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