CAJ | 학술논문

集油管线用玻璃钢管在使用过程中发生了管体脆性开裂失效事故。为了探讨玻璃钢管的失效原因,采用差式扫描量热仪、水压试验机、材料试验机等分析手段,研究了玻璃钢管的失效断口形貌、玻璃化转变温度、树脂含量、承压能力和管体与接头位置力学性能等。结果表明：玻璃钢管树脂含量偏低导致树脂对纤维胶合作用降低,是玻璃钢管力学性能较低、容易失效的重要原因。玻璃钢管端部刚度不及管体部位1/2,在受到外部地层沉降或其它外力载荷条件下,管端部位出现脆性开裂而导致漏油。
집유관선용파리강관재사용과정중발생료관체취성개렬실효사고。위료탐토파리강관적실효원인,채용차식소묘량열의、수압시험궤、재료시험궤등분석수단,연구료파리강관적실효단구형모、파리화전변온도、수지함량、승압능력화관체여접두위치역학성능등。결과표명：파리강관수지함량편저도치수지대섬유효합작용강저,시파리강관역학성능교저、용역실효적중요원인。파리강관단부강도불급관체부위1/2,재수도외부지층침강혹기타외력재하조건하,관단부위출현취성개렬이도치루유。
A GFRP for oil gathering pipeline failed during service. Investigations were performed to identify the possible failure causes of the pipe. The failure fracture morphology, Tg , resin content, hydraulic pressure rating, outer load resisting performance of the pipe and the joint position were systematically studied by using DSC,hydraulic pressure testing machine and MTS,etc. The results showed that lower resin content lead to the lower bonding effect of resin on the fiber, which is an important cause of lower mechanical property of GFRP and easy to failure. The stiffness of pipe near the joint is less than half of that the pipe body. The pipe near the joint end occurred brittle cracking and lead to oil spills under the ground settlement or other external loading conditions.