Effects of thermo-oxidative aging on 3-D deformation field and mechanical behaviors of 3-D angle-interlock woven composites. (1st February 2022)

• Record Type: Journal Article
• Authors: Ke, Yanan; Huang, Shuwei; Guo, Jinhui; Han, Chaofeng; Sun, Baozhong; Gu, Bohong
• Is Part Of: Composite structures. Volume 281(2022)
• Publication Date: 2022-02-01
• Subjects: 3-Dimensional reinforcement -- Atmospheric aging -- 3-D deformation field -- Finite element analysis (FEA); Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2021.115116
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: The effect of thermo-oxidative aging on mechanical properties is a key factor in designing composites structures. This paper aims to explore the effects of thermo-oxidative aging on the mechanical behavior, surface deformation and damage evolution of 3-D angle-interlock woven composites (3DAWC) under compression. A bilinear stress-strain curve with high failure strength and compressive modulus were obtained for the unaged sample. The transition region of the stress-strain curve disappeared for the aged sample due to epoxy resin degradation and cracks. The transition strain decreases as the interface damage starts earlier after thermo-oxidative aging. The surface strain, off-plane displacement and Poisson's ratio distribution show structural correlation during compression. Both the surface average strain and the average Poisson's ratio decrease with aging time. A finite element model has been established to explore the mechanical degradation mechanisms.