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Stiffness degradation and progressive failure of composite laminates arecomplex processes involving evolution and multi-mode interactions among fiberfractures, intra-ply matrix cracks and inter-ply delaminations. This paperpresents a novel finite element model capable of explicitly treating suchdiscrete failures in laminates of random layup. Matching of nodes is guaranteedat potential crack bifurcations to ensure correct displacement jumps near cracktips and explicit load transfer among cracks. The model is entirelygeometry-based (no mesh prerequisite) with distinct segments assembled togetherusing surface-based tie constraints, and thus requires no element partitioningor enrichment. Several numerical examples are included to demonstrate themodel's ability to generate results that are in qualitative and quantitativeagreement with experimental observations on both damage evolution and tensilestrength of specimens. The present model is believed unique in realizingsimultaneous and accurate coupling of all three types of failures in laminateshaving arbitrary ply angles and layup.

An Auto-Generated Geometry-Based Discrete Finite Element Model for Damage Evolution in Composite Laminates with Arbitrary Stacking Sequence