Experimental study of defect formation during processing of randomly-oriented strand carbon/PEEK composites
Experimental study of defect formation during processing of randomly-oriented strand carbon/PEEK composites
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DOI：
10.1016/j.compositesa.2015.05.020
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发表时间：
2015-10-01
影响因子：
8.7
通讯作者：
Hubert, Pascal
中科院分区：
文献类型：
--
作者：
Landry, Benoit;Hubert, Pascal
研究了无规取向碳/聚醚醚酮复合材料在压缩成型过程中产生的成型缺陷。缺陷形成的原因被认为是由于结晶开始时热膨胀系数高而导致的收缩不均匀。在冷却过程中，通过在特定温度下释放成型压力来成型含气量在0%~1.3%之间的板材。力学测试表明，当孔洞含量为0.63-1.3%时，试件的抗压强度从15%降至25%。结果表明，壁板表面孔隙率较高是导致强度降低的可能原因。(C)2015爱思唯尔有限公司。保留所有权利。
An investigation of the moulding defects formed during compression moulding of randomly-oriented strand carbon/PEEK composites is presented. The cause of defect formation was identified as non-uniform shrinkage due to a high coefficient of thermal expansion at the onset of crystallization. Panels with void content ranging from 0% to 1.3% were moulded by releasing the moulding pressure at specific temperatures during the cooling process. Mechanical tests showed a reduction in specimen compressive strength from 15% to 25% for a void content of 0.63-1.3%. It was concluded that the high concentration of porosity near the surface of the panels was the likely cause of the strength reduction. (C) 2015 Elsevier Ltd. All rights reserved.