Method and system for calculating high-temperature tensile constitutive model of woven ceramic matrix composite

The invention provides a calculation method and system for a high-temperature tensile constitutive model of a woven ceramic-based composite material. The method comprises the following steps: constructing a finite element model of the woven ceramic-based composite material; determining reduction coefficients of unit elastic parameters in the preparation process; determining the average thermal deformation of the material during free expansion at the high temperature; the yarn high-temperature stretching constitutive curve is substituted into the finite element model, and an initial high-temperature stretching constitutive curve of the woven ceramic matrix composite is determined; and based on the initial high-temperature tensile constitutive curve, interpolating to obtain corresponding strain when the stress is zero, and extracting points with stress greater than zero in the initial high-temperature tensile constitutive curve to obtain the high-temperature tensile constitutive curve of the woven ceramic matri