Meso-Scale Modeling to Characterize Moisture Absorption of 3D Woven Composite

被引：10
作者：
Yuan, Yuan [1 ]
Zhou, Chu-wei [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Jiangsu, Peoples R China
来源：
APPLIED COMPOSITE MATERIALS | 2016年 / 23卷 / 04期
基金：
中国国家自然科学基金;
关键词：
3D woven composite; Moisture absorption; Two-stage phenomenon; Interphase; Meso-scale FE model; GLASS FIBRE/EPOXY COMPOSITE; CARBON-EPOXY COMPOSITES; MECHANICAL-PROPERTIES; DIFFUSION; BEHAVIOR; DEGRADATION; WATER; TEMPERATURE; IMMERSION; IMPACT;
D O I：
10.1007/s10443-016-9482-7
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
For polymer-matrix composites, moisture is expected to degrade their mechanical properties due to matrix plasticization and moisture introduced micro-scale defects. In this study, the moisture absorptions of bulk epoxy, unidirectional composite (UD) and 3D woven composite (3D WC) were tested. Two-stage features have been observed for all these three materials. Moisture properties for UD and 3D WC were found not in simple direct proportion to their matrix volume fractions. The moisture approach of UD was modeled including the effect of fiber/matrix interphase which promotes the moisture uptake. Then, meso-scale FE model for 3D WC was established to characterize the inhomogeneous moisture diffusion. The moisture properties of resin-rich region and fiber bundle in 3D WC were determined from water uptake experiments of bulk epoxy and UD, respectively. Through homogenizing moisture properties of surface and interior weave structures, a simplified theoretical sandwich moisture diffusion approach was established. The moisture weight gains of 3D WC predicted by both meso-scale FE model and simplified sandwich approach were well agreed with the experimental data.
引用
收藏
页码：719 / 738
页数：20
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