Standard Angle and Non-Standard Angle Composite Laminate Design and Modeling under Open-Hole Compression
Author(s)
Yu, Su
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Abstract
The author studies the design of composite laminates under open-hole compression (OHC) in this dissertation, with particular focus on aerospace applications. Composite laminates are studied with two primary motivations. First, the structural performance of laminate panels can be improved from a material design perspective. With optimized material design, improvements in strength, weight, and manufacturing can be achieved. Second, the application of composite laminates can be expanded by improved material characterization and modeling. Currently, the lack of adequate test data and reliable material models restricts the confidence in composite laminates, thus hindering their application. This thesis approaches these challenges with affordable material characterization methods and reliable material models.
In light of these two motivations, the research outcomes are summarized into three research contributions.
- From ply orientation and stacking sequence, the laminates can be designed with improved OHC strength (up to 33%), reduced weight, and improved manufacturing compatibility.
- A compact OHC test fixture is developed. It reduces material cost during characterization by 80% for more affordable composite characterization
- Three different modeling and simulation approaches are explored and compared, including empirical analysis, Finite-Element Method, and Artificial Neural-Networks. All three approaches can be used to model composite laminates, each with its unique pros and cons.
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Date
2021-05-18
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Dissertation