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In this study, multiple and non-planar crack propagation analyses are performed using Fracture and\udCrack Propagation Analysis System (FCPAS). In an effort to apply and validate FCPAS procedures for multiple\udand non-planar crack propagation analyses, various problems are solved and the results are compared with data\udavailable in the literature. The method makes use of finite elements, specifically three-dimensional enriched\udelements to compute stress intensity factors (SIFs) without special meshing requirements. A fatigue crack\udpropagation criterion, such as Paris-Erdoğan equation, is also used along with stress intensity factors to conduct\udthe simulation. Finite element models are generated within ANSYS™ software, converted into and solved in\udFRAC3D program, which employs enriched crack tip elements. Having computed the SIFs for a given crack\udgrowth increment and using a growth criterion, the next incremental crack path is predicted and the fracture\udmodel is updated to reflect the non-planar crack growth. This procedure is repeated until cracks reach a desired\udlength or when SIFs exceed the fracture toughness of the material. It is shown that FCPAS results are in good\udagreement with literature data in terms of SIFs, crack paths and crack growth life of the structure. Thus,\udaccuracy and reliability of FCPAS software for multiple and non-planar crack propagation in thin structures is\udproven

Multiple and non-planar crack propagation analyses in thin structures using FCPAS