航空科学技术2024，Vol.35Issue(9)：54-62,9.DOI:10.19452/j.issn1007-5453.2024.09.006
织物剪切对盔壳复合材料弯曲性能的影响研究
Study on the Effect of Fabric Shear Deformation on the Bending Properties of Helmet Shell Composites
摘要
Abstract
Pilot's helmet wearing and removing need shell in the elastic range of a certain deformation.Through the process of designing a reasonable adjustment of the shell stiffness the comfort of the helmet can be improved.In this paper,the effect of shear deformation of multilayered biaxial weft knitted fabrics on the flexural properties of composite sheets reinforced by them is investigated.The deformation of the fabric at different positions of the helmet was investigated using the zoning method.Mechanical properties and damage morphology of composites by universal testing machine and ultra-depth three-dimensional microscope was characterized.The results show that the bending stiffness of the composites is greatly affected by the shear deformation,which shows a tendency of first increasing,then decreasing and then increasing with the increase of the shear angle.The bending strength of composites is less affected by shear deformation and is minimized when the shear angle is between 20° and 30°.This paper confirms that the stiffness of composites can be effectively adjusted by using the shear deformation of fabrics,which can provide a reference for the optimized design of helmet shell stiffness.关键词
复合材料/头盔壳体/剪切角/弯曲刚度/纬编双轴向织物Key words
composite/helmet shell/shear angle/bending stiffness/multilayered-connected biaxial weft knitted分类
通用工业技术引用本文复制引用
高世望,齐业雄,李妙..织物剪切对盔壳复合材料弯曲性能的影响研究[J].航空科学技术,2024,35(9):54-62,9.基金项目
航空科学基金(202000290Q2001) Aeronautical Science Foundation of China(202000290Q2001) （202000290Q2001）
