Impact tensile properties and strength development mechanism of glass for reinforcement fiber

International Symposium on Dynamic Deformation and Fracture of Advanced Materials 2013

物理学;材料科学

Kim, T.^1 ; Oshima, K.^1 ; Kawada, H.^2

Department of Applied Mechanics and Aerospace Engineering, Graduate School of Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan^1

Department of Applied Mechanics and Aerospace Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan^2

关键词: Crack propagation rate;    High speed tensile testing;    Numerical estimation;    Reinforcement fibers;    Small crack propagation;    Split Hopkinson pressure bars;    Strain rate dependency;    Tensile loading condition;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/451/1/012006/pdf
DOI  :  10.1088/1742-6596/451/1/012006

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this study, impact tensile properties of E-glass were investigated by fiber bundle testing under a high strain rate. The impact tests were performed employing two types of experiments. One is the tension-type split Hopkinson pressure bar system, and the other is the universal high-speed tensile-testing machine. As the results, it was found that not only the tensile strength but also the fracture strain of E-glass fiber improved with the strain rate. The absorbed strain energy of this material significantly increased. It was also found that the degree of the strain rate dependency of E-glass fibers on the tensile strength was varied according to fiber diameter. As for the strain rate dependency of the glass fiber under tensile loading condition, change of the small crack-propagation behaviour was considered to clarify the development of the fiber strength. The tensile fiber strength was estimated by employing the numerical simulation based on the slow crack-growth model (SCG). Through the parametric study against the coefficient of the crack propagation rate, the numerical estimation value was obtained for the various testing conditions. It was concluded that the slow crack-growth behaviour in the glass fiber was an essential for the increase in the strength of this material.