预制缺陷尺寸对脱粘缺陷内部形貌的影响研究

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Study on the influence of prefabricated defect size on the internal morphology of debonding defects

XUN Guoli*， LI Yue， ZHOU Changgeng （Composite Materials Technology Center，AVIC Manufacturing Technology Institute，Beijing 100130）

Abstract：Carbon-fiber-reinforced bismaleimideresincompositelaminates withpre-fabricateddefectswere successfuly prepared.Theadhesive filmof thesameresin systemwasutilized to prepareadhesive specimenswith debonding defects throughtheadhesiveco-curing process.Ultrasonic C-scan technologywasused for non-destructive testing to confirm thelocationandsizeofdefects.Meanwhile，theinfluenceofthediameteranddepthof prefabricateddefectsontheinternal morphology of debonding defects was studied usingoptical microscopyand metalographic microscopy.Theresultsshowed thattheinternal morphologyofdefectscanbeclassified intothree types：theresin-filed typein whichtheadhesivefilm resinbasicallyfillsteinteriorofthedefectscompletely；thegas-flledtypeinwhichtheahesivefilmresinfillstheinteriorofthedefects，butthereisalargebubbleinside；andtheoutwarddifusiontypeinwhichtheadhesivefilmresinfilsthe interiorof the defects well，yet there area large number of voids distributed within it.

Keywords：adhesivedefects；internal morphology；adhesiveco-curing；adhesive joints；carbon fibercomposites

1引言

碳纤维树脂基复合材料（CFRP）是以碳纤维为增强体、以树脂为基体的结构复合材料。（剩余4872字）