Singular integral calculation method, device and equipment suitable for fracture problem of functionally graded material part

In order to meet the requirement of high-precision numerical simulation on singular integral calculation in the functionally graded material part fracture problem, the invention discloses a singular integral calculation method, device and equipment suitable for the functionally graded material part fracture problem. Comprising the following steps: step 1, importing a geometric model of a functionally graded material part, and establishing a refined fracture problem calculation model; and step 2, performing adaptive grid division based on geometric information of the functionally graded material part fracture problem calculation model. And step 3, dividing the grid unit into a projection area and a subdivision area through an area division method based on affine transformation. And step 4, subdividing the subdivided region by using a self-adaptive subdivision method to generate integral sub-blocks. And step 5, constructing an integral sub-block between the projection area and the singular point through a radia