CAJ | 학술논문

碳/环氧复合材料横管作为天线结构的一部分,在进行第60次展开试验的过程中发生了开裂. 通过弯曲试验、宏观观察、微观观察及金相分析等手段,对横管的破坏模式、失效原因进行分析,并提出后续解决措施建议. 结果表明:横管的破坏形式为弯曲破坏,其在收拢、展开过程中受反复加载的压缩-弯曲载荷的作用发生弯曲变形,在变形集中区缺陷发生扩展并逐步形成分层开裂损伤,使局部区域刚度下降,在后续使用中分层开裂损伤进一步加剧,导致横管的整体刚度逐渐下降,最终在第60次展开试验中发生弯曲失稳破坏.
탄/배양복합재료횡관작위천선결구적일부분,재진행제60차전개시험적과정중발생료개렬. 통과만곡시험、굉관관찰、미관관찰급금상분석등수단,대횡관적파배모식、실효원인진행분석,병제출후속해결조시건의. 결과표명:횡관적파배형식위만곡파배,기재수롱、전개과정중수반복가재적압축-만곡재하적작용발생만곡변형,재변형집중구결함발생확전병축보형성분층개렬손상,사국부구역강도하강,재후속사용중분층개렬손상진일보가극,도치횡관적정체강도축점하강,최종재제60차전개시험중발생만곡실은파배.
Carbon fiber/epoxy composite transverse pipe, a part of antenna structure, cracked during the sixtieth unfolding test. By means of bending test, macro and micro observation, metallographic analysis, the failure mode and cause were finally found out and the resolving advice was given. The results indicate that the failure mode of the transverse pipe is bending fracture. During the test, bending transformation occurred under the effect of the reloading compressing-bending load. Defects propagated and then formed delamination damage at the transformation concentration zones, which made stiffness decrease locally. Then as the test went on, the delamination damage propagated and the stiffness of the whole pipe decreased. As a result, the pipe fractured in the form of unstably bending during the sixtieth unfolding test.