| DOI | Resolve DOI: https://doi.org/10.1016/j.compstruct.2016.01.012 |
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| Author | Search for: Marouene, A.; Search for: Boukhili, R.; Search for: Chen, J.1; Search for: Yousefpour, A.1 |
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| Affiliation | - National Research Council of Canada. Aerospace
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| Format | Text, Article |
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| Subject | ABAQUS; Buckling; Computer software; Finite element method; Laminates; MATLAB; Nonlinear analysis; Paper laminates; Stiffness; Composite laminate; Critical buckling loads; Fiber placement; Finite element simulations; Gaps/overlaps; Linear buckling analysis; Numerical and experimental study; Numerical investigations; Laminated composites; Composites; Fibers |
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| Abstract | This paper reports an experimental and numerical investigation of the effects of gaps and overlaps on the buckling behavior of variable-stiffness composite laminates. In the experimental study, variable-stiffness composite laminates with a constant-curvature fiber path were manufactured and tested under uniaxial compression to failure with simply supported edges. The tested panels were optimized to simultaneously maximize the in-plane stiffness and the buckling load. Two manufacturing strategies - complete overlaps and complete gaps - were adopted to allow the independent effect of each type of defect to be investigated in isolation. In the numerical study, a two-dimensional finite element model was built using the commercial software Abaqus through a Python input script. A MATLAB routine was also implemented to localize the gaps and overlaps within the studied variable-stiffness laminates. A linear buckling analysis was performed to calculate the pre-buckling strength and the critical buckling load for each tested composite laminate. Thereafter, a nonlinear analysis using the Riks method was performed to predict the load-displacement relationship, considering the geometric imperfections of cured composite laminates. A good correlation was observed between the results obtained from the finite element simulations and from the experiments. |
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| Publication date | 2016-01-08 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21277434 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | a1dad797-c921-46b5-92d7-b527f11cd9be |
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| Record created | 2016-03-09 |
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| Record modified | 2020-03-16 |
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