Tensile Thermal Stress Finite Element Analysis of ITER Axial Composite Insulation Break

Abstract

Thermal stress analysis was conducted using ANSYS software for ITER composite insulation breaks withstanding cryogenic the tensile load. Low-temperature shock impact, the inner pressure shock impact and tensile stress impact were analyzed. Analysis results show that: As a result of the different thermal expansion coefficient of the interface metal and insulating body, the interfacial thermal stress is the main factor affecting the performance of insulating tightness when the temperature dropped to liquid helium temperature.