论文部分内容阅读
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.
The self-designed thermal membrane forming process experiment device was used to prepare C-shaped carbon fiber composite preform. The variation of preform and mold temperature during the forming process was tested. The effects of forming temperature, preform size on C Shaped preform surface.The results show that during the process of hot membrane forming, the method of preheating the mold and the infrared lamp radiation can ensure the uniformity of the prepreg temperature distribution. When the molding temperature is too low , Prepreg viscous, poor slip between the layers, resulting in fiber preform wrinkles around the corner, and more internal porosity; preform shape and size of the mold close to the preform susceptible to diaphragm bridging , Deformation is too large and warping and other defects appear, so the size ratio between the preform and the mold should be controlled within a certain range.