Fracture analysis of a non-homogeneous coating structure with dual interfaces under thermal shock

•Newmark method is employed to obtain the strong transient temperature fields of nonhomogeneous coating structures•The influences of strong and weak interfaces on the transient thermal stress intensity factors (TSIFs) are studied•The crack growth laws under thermal shock at the strong and weak interfaces are analyzed•The optimal thickness ratio of the dual interface structure ranging is selected to minimize the likelihood of thermal fracture