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Indexed by:期刊论文

Date of Publication:2019-08-01

Journal:COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING

Included Journals:SCIE、EI

Volume:123

Page Number:242-252

ISSN No.:1359-835X

Key Words:Thermoplastic resin; Laminates; Environmental degradation; Analytical modelling

Abstract:This paper presented an investigation into the hydrothermal aging behavior and mechanical durability of carbon fabric reinforced polyamide 6 (CF/PA6) laminates. Moisture absorption, tensile and flexural tests of CF/PA6 laminates were conducted by immersing in distilled water under different temperatures. Based on our experimental observation, a novel extended Fickian model was proposed to capture the post-saturation diffusion behavior of CF/PA6. Diffusion coefficients of CF/PA6 composites were obtained for 1D and 3D Fickian model and the extended one. Furthermore, dynamic mechanical analysis demonstrated activated chain motion induced by absorbed water at higher aging temperatures. Micro-cavities on the surface and micro-cracks in the cross-section of moisture uptake samples aged at 60 degrees C-water revealed that hot/wet environment accelerated the damages of CF/PA6 laminates. Mechanical results showed that tensile properties were well-maintained, however, flexural properties were attenuated under hydrothermal aging, and the failure mode of unaged and aged flexural specimens were discussed.