Method and system for determining fatigue damage of anisotropic material

The invention relates to a method and a system for determining fatigue damage of an anisotropic material. The method comprises the following steps: acquiring a crystal face index of a to-be-detected structural member; the material of the to-be-detected structural member is an anisotropic material; performing stress-strain finite element analysis on the to-be-detected structural member to determine a flexibility matrix; determining elastic moduli of the to-be-detected structural member in different crystal axis directions according to the crystal face index and the flexibility matrix; determining a strain range according to the temperature distribution of the to-be-detected structural member; and determining the damage distribution of the to-be-detected structural member by using a damage mechanics method according to the elastic modulus and the strain range. According to the invention, the local damage of the anisotropic material structural member can be determined. 本发明涉及一种各向异性材料的疲劳损伤确定方法及系统，方法包括：获取待检测结构件的晶面指