GB/T 46065-2025 "Test Method for Room Temperature Axial Tensile Properties of Continuous Fiber Reinforced Ceramic Matrix Composite Tubes" is a standard developed to meet the performance evaluation requirements for new materials in high-end fields such as nuclear energy. It specifically specifies the test method for determining key properties such as axial tensile strength, elastic modulus, maximum strain, and Poisson's ratio of continuous fiber-reinforced ceramic matrix or glass matrix composite tubes at room temperature. This method is applicable to tubular structure samples reinforced with unidirectional, bidirectional, or multidirectional fibers. Its core principle involves installing the tubular specimen onto a universal material testing machine that meets precision requirements using a dedicated clamping device, applying axial tensile load until fracture, and simultaneously recording load and strain data. Key testing instruments mentioned in the standard primarily include a universal material testing machine that meets precision requirements (typically Class 1 or better) and an extensometer used to measure axial and transverse deformation for calculating Poisson's ratio.