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18 April 2023 Moisture effect analysis of bistable composite laminates in maximum relative humidity environment (Conference Presentation)
Shoab Ahmed Chowdhury, Suyi Li, Oliver J. Myers
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Proceedings Volume PC12484, Behavior and Mechanics of Multifunctional Materials XVII; PC124840B (2023) https://doi.org/10.1117/12.2657292
Event: SPIE Smart Structures + Nondestructive Evaluation, 2023, Long Beach, California, United States
Abstract
The performance of bistable composite laminates is affected significantly by environmental conditions like moisture, resulting in changes in their structural performance. This study characterizes the moisture effect on the maximum height, curvature, and snap-through load of the [0/90] CFRP laminates in a 100% RH environment. Laminates are submerged in a de-ionized water bath up to moisture saturation, and their maximum height, curvature, and snap-through load are measured. This work updates an existing analytical and FEA model to incorporate the effect of moisture on these parameters by expressing the combined thermal and moisture expansion coefficients as a function of diffusivity, time, and thickness. Test results revealed a significant reduction in all three parameters during the initial rapid moisture uptake period of Fickian absorption, followed by a gradual reduction at a substantially lower rate. The FEA and analytical model demonstrated good agreement with the test results.
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Shoab Ahmed Chowdhury, Suyi Li, and Oliver J. Myers "Moisture effect analysis of bistable composite laminates in maximum relative humidity environment (Conference Presentation)", Proc. SPIE PC12484, Behavior and Mechanics of Multifunctional Materials XVII, PC124840B (18 April 2023); https://doi.org/10.1117/12.2657292
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KEYWORDS
Composites
Humidity
Absorption
Finite element methods
Energy harvesting
Performance modeling
Thermal modeling
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