期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 72, 期 2, 页码 159-166出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2011.10.012
关键词
Carbon fibers; Polymer-matrix composites (PMCs); Impact behavior; Mechanical properties
资金
- AFOSR DEPSCoR [FA955-05-1-0481]
Fiber reinforced high temperature polymer matrix composites are currently gaining wide usage in aircraft structures, especially in airframe and engine inlet casing. The failure of composites in worst-case operational conditions mandates the extensive investigation of the mechanical behavior, and the durability in long-term performance and service life under thermal oxidation. In this work, unidirectional IM7 carbon fiber reinforced high-temperature BMI resin composite (IM7/5250-4) were isothermally aged in air for 2 months at 195 degrees C and 245 degrees C, respectively. The dynamic behavior of thermally aged composites was investigated on a split Hopkinson pressure bar (SHPB) in three principal directions. The results indicate that thermal oxidation leads to significant reduction in both stiffness and strength of the composites. Optical micrographs of fracture surface and failure pattern of composite after SHPB impact reveals oxidation induced debonding along the fiber-matrix interface due to oxygen diffusion under long-term exposure to elevated temperatures. (C) 2011 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据