Effects of cure cycles on void content and mechanical properties of composite laminates
Effects of cure cycles on void content and mechanical properties of composite laminates
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DOI：
10.1016/j.compstruct.2005.02.001
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发表时间：
2006-06-01
影响因子：
6.3
通讯作者：
Wu, ZJ
中科院分区：
文献类型：
--
作者：
Liu, L;Zhang, BM;Wu, ZJ
设计了不同的固化周期，以评估不同的压力诱导的孔隙对碳/环氧层压板的一些力学性能的影响和最佳的固化压力时间。制造了一系列具有不同空隙含量的[0/90]（3s）层压板，并使用超声c扫描和光学金相技术获得层压板内的空隙分布、尺寸和形状的表征。短梁剪切，三点弯曲和拉伸试验用于力学评价和相关的空隙体积分数和超声吸收系数的结果。实验结果表明，存在一个最佳加压时间。所提出的超声检测分级评价方法对复合材料的无损检测具有一定的指导意义。此外，由于孔隙率导致的机械性能变化与先前发表的研究一致。(C)2005爱思唯尔有限公司保留所有权利。
Various curing cycles were designed to evaluate the effects of different pressure induced voids on some mechanical properties of carbon/epoxy laminates and optimum cure pressure time. A series Of [0/90](3s), laminates with varying void contents were fabricated and a characterization of void distribution, size, and shape within the laminates was obtained using ultrasonic c-scan and optical metallography techniques. Short beam shear, three-point flexure and tensile testing were used for mechanical evaluation and the results correlated to void volume fraction and ultrasonic absorption coefficient. The experimental results have shown that there exists an optimum time for applying pressure. The proposed grading evaluation method of ultrasonic inspection is helpful for the nondestructive examination of composites. Also, changes in mechanical performance due to porosity are consistent with previously published studies. (C) 2005 Elsevier Ltd. All rights reserved.