Computational Technique for Crack Propagation Simulation in Viscoelastic Solid Propellant

To further investigate the fracture response in propellant grain, numerical methodology is proposed to cope with crack propagation simulation especially for mixed mode condition. The discrete scheme of linear viscoelastic constitutive model proposed, which provides a key means propagation. In order simulate cohesive traction distribution on new surface, extrinsic Park-Paulino-Roesler (PPR) zone (CZM) introduced. let propagate along any direction determined, element splitting technique and its corresponding topological operations are step by step. Then, computational implementation process explained greater detail. Typical problem, single edge-notched tension test (SENT) solved demonstrate efficiency accuracy method. addition, double (DENT) as well plate slant conducted show special characters solid propellant, like time dependence. Computational results reveal that method can be utilized investigation combined experimental findings.