Implementation and verification of the Park–Paulino–Roesler cohesive zone model in 3D

• This paper gives the generalization of the intrinsic PPR model to three-dimensions.
• This paper also gives a description of the PPR’s implementation in a FE framework.
• Four test specimens are considered for the 3D PPR model’s verification.
• The 3D PPR model’s performance under severe mode-mixity is also considered.

The Park–Paulino–Roesler (PPR) potential-based model is a cohesive constitutive model formulated to be consistent under a high degree of mode-mixity. Herein, the PPR’s generalization to three-dimensions is detailed, its implementation in a finite element framework is discussed, and its use in single-core and high performance computing (HPC) applications is demonstrated. The PPR model is shown to be an effective constitutive model to account for crack nucleation and propagation in a variety of applications including adhesives, composites, linepipe steel, and microstructures.