纺织复合材料预制体变形研究综述

以具有良好整体性能的织物作为增强体的纺织复合材料克服了传统复合材料层间剪切强度低、抗分层能力差、开裂敏感等缺点,且具有优异的近净成形能力,易于成型。这些优点使得这种复合材料被越来越广泛地应用于航空航天、船舶、汽车、医疗器械等领域。纺织预制体的可变形性对其渗透率及最终复合材料构件的力学性能有着重要的影响。简要介绍了二维和三维织物的结构特点;阐述了织物的拉伸、横向压缩、面内剪切和弯曲变形机理;基于数值模拟和试验方法,综述了国内外预制体变形研究的进展;最后,展望了预制体变形数值模拟的发展方向。

A Review of Study on Deformation of Textile Composite Preforms

The textile composite materials,as reinforced by fabrics with good integrity,overcome the shortcomings of traditional ones,such as low interlaminar shear strength,poor resistance to delamination,sensitive to cracking.Moreover,they have excellent near-net-forming ability and are easy to be molded.These advantages have led to the increasing use of these composite materials in aerospace,marine,automotive,medical devices,and other fields.Deformability of textile preform has important effects on its permeability and the mechanical properties of the final composite parts.The aim of this paper is to provide an review on the current state of the studies on the deformation of textile preforms.It starts by briefly introducing the structural characteristics of 2D and 3D fabrics,then the tensile,transverse compression,in-plane shear and out-of-plane bending deformation mechanisms of fabrics are elaborated.The research progress of deformation of textile preforms is summarized based on numerical simulation and experimental tests.Finally,the challenges and outlook of the numerical simulation on the deformation of preforms are outlined.