多组分材料球形容器热力耦合应力分析与组分设计

Thermo-mechanical Coupling Stress Analysis and Component Design of Spherical Pressure Vessel Made of Multi-component Materials

随着堆焊、涂层及纳米等先进材料制造技术迅速发展,不同组分多层复合材料压力容器在工业中得到越来越广泛应用。然而,这些复合材料容器的覆层材料在热力耦合作用下的强度问题一直是理论研究和工程应用的盲区。为此,基于小变形线弹性理论和有限元数值方法,建立了某基层和覆层(耐蚀层+过渡层)三层材料组成的不同组分材料球形压力容器在热力耦合作用下的解析解和数值解,重点研究了覆层材料的力学性能。研究结果表明,理论解和数值解完全吻合,并得到覆层材料的力学特性。多方案对比分析结果也为该类不同组分多层复合材料容器更为科学的设计提供了理论依据和技术支持。

Pressure vessels made of multi - component gineering with the rapid development of the advanced materials are widely apphed into the industrial en- material manufacturing technology, such as the o- vedaying welding, coating technology and nanometer technology. However, httle work was reported on the thermo - mechanical coupling strength of the cladding for the composites vessel. Based on the linear - elastic theory and finite element technology, therefore, the closed form solution and numerical solution were constructed for the pressure vessel made of three -layer materials including the base layer and the cladding （the corrosion resistant and the transition layers） subjected to the pressure and temperature loads, and then the mechanical behavior of the cladding was further investigated. The results show good agreement between the closed form solution and numerical solution. Moreover, comparative analysis of the temperature condition and geometric distribution was also conducted, which would be helpful for the sci- entific design of the pressure vessel made of multi - layer materials.