Abstract:Planar woven composites, renowned for their superior mechanical properties and design flexibility, are extensively used in aerospace and automotive industries. However, their anisotropic nature and multi-scale damage mechanisms pose challenges in predicting their mechanical behavior. This paper addresses the progressive damage behavior of planar woven composites by developing a multi-scale damage analysis model. The study systematically investigates the material"s damage failure process and ultimate strength. Initially, a finite element model incorporating fibers, matrix, and interface is established based on a representative volume element at the microscale fiber bundle level. Cohesive elements are employed to simulate interface failure between the matrix and fibers, while Tsai-Wu failure criteria and stiffness recursive reduction schemes are utilized to model the initiation and accumulation of fiber bundle damage. Subsequently, a scale-bridging approach is applied to simulate the damage failure process and ultimate strength of planar woven composites, which is validated through comparisons with existing experimental results.