CAJ | 학술논문

针对一种三明治复合材料加筋 L 型接头，介绍了其结构形式和成型工艺，通过试验测试了接头的弯曲承载能力，分析了接头的破坏模式，并对其损伤机理进行了研究，以探求接头的技术改进路径。研究结果表明：L 型接头具有良好的吸能效果，在结构发生大变形破坏时，仍具有较高的弯曲承载能力；L 型接头的破坏主要发生在垂横加强筋的相交处，初始损伤是相交处侧面的玻璃钢和芯材发生界面分离；工程上应将改进 L 型接头垂横加强筋相交处的蒙皮和芯材之间的连接工艺作为提高接头承载能力的技术路径。
침대일충삼명치복합재료가근 L 형접두，개소료기결구형식화성형공예，통과시험측시료접두적만곡승재능력，분석료접두적파배모식，병대기손상궤리진행료연구，이탐구접두적기술개진로경。연구결과표명：L 형접두구유량호적흡능효과，재결구발생대변형파배시，잉구유교고적만곡승재능력；L 형접두적파배주요발생재수횡가강근적상교처，초시손상시상교처측면적파리강화심재발생계면분리；공정상응장개진 L 형접두수횡가강근상교처적몽피화심재지간적련접공예작위제고접두승재능력적기술로경。
Aiming at a sandwich composite L-joint with stiffeners,this paper presents its structure and molding process,analyzes the ways to damage the through testing its bending load-bearing capaci-ty and researches the damage mechanism so as to seek after the technical improvement of L-joint.The results show that because of its good energy absorption properties,L-joint can maintain high load-bearing capacity when there is a large deformation in structure.The failure of L-joint occurs at the in-tersection between the horizontal stiffener and the vertical stiffener.The initial damage appears on the interface separation between skin and core on the side-face of the intersection.So improving the con-nection technology is an effective approach to increasing the load-bearing capacity of L-joint in engi-neering.