Influence of specimen geometry on apparent Poisson's ratio evaluated under the compressive loading of quasi-isotropic CFRP laminate. (1st January 2021)

• Record Type: Journal Article
• Authors: Hara, Eiichi; Katoh, Hisaya; Iwahori, Yutaka; Yokozeki, Tomohiro
• Is Part Of: Advanced composite materials. Volume 30:Supplement 1(2021)
• Page Start: 96
• Page End: 110
• Publication Date: 2021-01-01
• Subjects: composite materials -- quasi-isotropic laminate -- compressive test -- Poisson's ratio; Composite materials -- Periodicals; Reinforced plastics -- Periodicals; Electronic journals; 620.11805
• DOI: 10.1080/09243046.2020.1753637
• Languages: English
• ISSNs: 0924-3046

Abstract

Abstract : The effects of specimen geometry on the Poisson's ratio of a quasi-isotropic carbon-fiber-reinforced polymer laminate were examined using compression tests. In particular, the divergence of the apparent Poisson's ratio from the theoretical value was experimentally determined for a decreasing specimen width/thickness ratio ( b / t ). The observed tendency was then confirmed by simulations using a finite element analysis (FEA). The FEA was performed using a 3D model of the specimens to investigate the strain and stress distribution. In the evaluation of the apparent Poisson's ratio, the strain in the width direction was shown to vary under the condition of low b / t . The FEA results revealed that changes to the width strain were caused by cross-sectional deformation under compressive loading, resulting from differences in layer angles and stiffness between the outermost and inner layers.