中文摘要：

为分析金属壳体在柱面高压加载下的膨胀规律、结构强度和失效模式,设计一种实现壳体柱面膨胀加载的实验装置。该装置采用三轴试验机对高聚物填充物进行轴向压缩,填充物发生侧向膨胀从而实现对金属壳体内侧柱面的均匀加载,金属柱壳内侧压力和径向变形通过三轴试验机的轴压伺服系统、薄膜压力传感器和引伸计进行测量。利用该装置对含缺陷的LY-12硬铝柱壳进行加载得到在柱面加载下不同结构金属柱壳环向的拉伸应力和相对变形的关系,并发现金属柱壳在高强度柱面加载下发生剪切断裂失效,验证该加载测试方法的有效性,为研究材料和结构在柱面加载下的力学响应和失效模式提供依据。

英文摘要：

An expansion loading experimental facility is established to analyze the expansion rule, structure strength and failure mode of the metal cylindrical shell under high pressure. An axial compression is firstly loaded on the filling polymer via rock triaxial testing system （RTFS）, which results in a radial expanding of the polymeric filling and then consequently generate a uniform radial loading on the inner surface of the shell. Accordingly, the pressure on sidewall and radial displacement could be measured by axle load servo system, thin film pressure sensor and extensometer of the RTTS. Under this radial loading, the stress-displacement relationship of the different Duralumin LY-12 cylindrical shell with flaws is gained and these shells demonstrate shear fracture failure. This efficient loading technique has been proved to be effective, providing basis for further research on the mechanical response and the failure mode of the material and structure under cylindrical expansion loading.