Helicopter composite armor anti-penetration FEM-SPH coupling analysis method

The invention relates to a helicopter composite armor anti-penetration FEM-SPH coupling analysis method, which is characterized in that based on failure modes of different material systems in a target test, on the basis of the deformation degree of an armor-piercing bullet, the type and size of a sub-layer material of a target plate and whether the target plate is an impacted area, two algorithms of FEM and SPH are adopted, and the anti-penetration of the composite armor of the helicopter is realized. According to the method, the armor-piercing projectile and the target plate are modeled in a partitioned mode, grid distortion and unit deletion in an FEM algorithm and numerical fracture of particles in an SPH algorithm are avoided, the method can be used for numerical simulation analysis of helicopter composite armor armor-piercing projectile penetration resistance, a reliable simulation result is obtained, the target test direction can be guided in the helicopter composite armor design process, and the reliab