Progressive damage and failure response of hybrid 3D textile composites subjected to flexural loading, part I: Experimental studies

摘要: Abstract This paper presents an experimental investigation of the deformation responses and failure mechanisms hybrid 3D textile composites (H3DTCs) subjected to quasi-static three-point bending. The term “hybrid” refers different constituent fiber tows, including carbon, glass, Kevlar that are integrally woven into a single preform. Three architectures, manufactured by varying percentages lay-ups were examined understand effect hybridization on resulting performance enhancement, bending modulus, flexural yield stress, strain failure. All architectures show “plastic-like” nonlinear response, indicating considerable damage tolerance durability for this class materials. It has been found increasing thickness specimens can increase in flexure. For asymmetric H3DTC, which architecture carbon plies one side glass other (through-the-thickness), increased stress be achieved placing experiences compressive straining flexure, whereas is reduced tension. Distributed matrix cracking was observed regions predominant tension through digital image correlation (DIC) technique. Although results architecture-dependent responses, tow kinking, develops specimen determined strength limiting mechanism materials loading. subsequently used as basis developing mechanics based multiscale computational model H3DTC deformation, response Details modeling strategy development constitutive models presented Part II two-part sequence (Zhang et al., 2015).