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碳纤维复合材料C形结构热隔膜成型工艺

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Abstract:

采用自行设计的热隔膜成型工艺实验装置,制备了C形结构碳纤维复合材料预成型体,测试了成型过程中预成型体和模具温度的变化规律,并考察了成型温度、预成型体尺寸对C形预成型体表面质量和内部缺陷的影响.结果表明热隔膜成型过程中,采用模具预热的方法与红外灯辐射相配合,可保证预浸料温度的分布均匀性;成型温度过低时,预浸料粘性大、层间滑移能力差,导致预成型体拐角处出现纤维褶皱,并且内部孔隙偏多;预成型体的外形尺寸与模具尺寸接近,则预成型体易受隔膜架桥、变形量过大影响而出现翘曲等缺陷,因此预成型体与模具之间的尺寸比例应控制在一定范围内.

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