This paper presents a new reduced order multiscale computational methodologyfor prediction of damage accumulation and failure in composite materials andstructures. The proposed reduced order modeling approach relies on the idea ofprescribing a finite number of discrete failure paths that can occur within the materialmicrostructure, and tracking the evolution of damage within these failure paths as afunction of loading. The key contribution and the novelty of the approach compared toexisting and similar formulations is that the failure paths are expressed as surfacemorphologies, within which the failure is tracked by traction-separation laws, asopposed to unit cell sub-volumes, where the failure is tracked by continuum damagemechanics models. The homogenization and localization operations are performed byemploying computational homogenization principles. This paper introduces theformulation of the proposed reduced order modeling approach in the context of aunidirectionally reinforced composite unit cell. The capabilities of the multiscalemodel in capturing damage propagation and fracture are demonstrated using laminaand laminate configurations including open hole specimens. This paper particularlyfocuses on the analysis of the approach with regard to mesh sensitivity of damageaccumulation when subjected to static and cyclic loading conditions. We demonstratethat the proposed formulation achieves mesh consistency.
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