环氧复合材料微波扫描修补工艺及力学性能研究  

RESEARCH ON PROCESS AND MECHANICAL PROPERTIES OF EPOXY RESIN COMPOSITE REPAIRED BY SCANNING MICROWAVE IRRADIATION

作　　者：游彦宇 李勇[1] 还大军[1] 刘政杰[1] 肖军[2] 周克印[2] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016 [2]南京航空航天大学航空宇航学院,南京210016

出　　处：《玻璃钢／复合材料》2016年第2期10-17,共8页Fiber Reinforced Plastics/Composites

基　　金：国家科技支撑计划(2012BAA01B02);江苏省优势学科建设工程资助项目

摘　　要：微波加热具有加热速度快、加热均匀等优点,将微波固化技术应用于复合材料的修补,具有巨大的发展前景。针对E51/DDM体系玻璃纤维复合材料的微波扫描快速修补,通过扫描设备对预制缺陷复合材料层合板进行修补,研究了微波扫描修补工艺及修补后试样的力学性能。研究结果表明,300mA输入直流电流所对应的固化工艺具有较高的固化效率,同时固化制品具有良好的力学性能,最终确定此工艺为微波扫描修补工艺;当修补试样未加覆盖外层时,修补后试样的拉伸性能保持率较高,弯曲性能保持率较低,拉伸强度及模量保持率分别为89%和92.7%,修补面加载与背面加载的弯曲强度保持率分别为74.9%和77.5%;添加覆盖外层后,修补试样的拉伸及弯曲性能均得到提高,拉伸强度及模量保持率分别提高为98.7%和95.4%,修补面加载与背面加载的弯曲强度保持率分别提高为96%和94.4%;与热固化修补相比,微波扫描修补能节省70%左右的修补时间,具有更高的修补效率。Microwave heating has a lot of advantages compared with the traditional heating method, such as heating fast, heating uniformly and so on. It is promising to apply microwave curing technology to the repair of composite materials. In this paper, composite laminated plates with prefabricated defects was repaired by microwave scanning equipment and the microwave scanning repair process as well as the mechanical properties of samples after repair was studied. The results show that the curing process with an input DC current of 300 mA possess high curing efficiency. At the same time, the curing product is of good mechanical properties, so we select this process as microwave scanning repair process eventually. When the repairing sample adding no covering ply, the tensile properties retention rate is relatively high, while the bending properties retention rate is relatively low. Tensile strength and modulus retention rate are 89% and 92. 7%, respectively. Bending strength retention rate loading on bending surface and back surface are 74. 9% and 77.5%, respectively. When the repairing sample adding covering plies, the tensile and bending properties of the sample are improved, and the tensile strength and modulus remain rate increased to 98.7% and 95.4%, respectively. The bending strength loading on bending surface and back are increased to 96% and 94.4%, respectively. Compared with the thermal curing repair, microwave scanning repair can save about 70% of the repair time and has a higher repairing efficiency.

关 键 词：复合材料 微波扫描修补 拉伸性能 弯曲性能 

分 类 号：TB332[一般工业技术—材料科学与工程]