A length scale insensitive anisotropic phase field fracture model for hyperelastic composites

Fracture of composites consisting of isotropic matrix and anisotropic fibers is an essential problem in many engineering applications. The computational simulation of such a fracture is complicated, but the use of phase field models (PFMs) is promising. Indeed, in PFMs, sharp cracks are not treated as discontinuities; instead, they are approximated as thin damage bands. Thus, PFMs can seamlessly model complex crack patterns like branching,...