繊維充てん複合材料の引張特性に及ぼす接着効果

概要

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The effect of adhesion between glass fibre and matrix on the tensile strength of two kinds of F. R. P. containing continuous or discontinuous glass fibres has been theoretically and experimentally discussed. The tensile behavior of F. R. P. containing continuous glass fibres is entirely similar to that of the blended fibres composed of two different kinds of fibres, so that the adhesion effect on the tensile strength of such F. R. P. is negligible. The shearing strength of adhesion τ_<jmax> between glass fibre and matrix of polystylene in the composite material containing discontinuous glass fibres has been obtained from the experimental data by means of the following formulae. σ_c=V_f・(1-l_c/2l)・σ_<fmax>+(1-V_f)・σ_<m1> and l_c=σ_<fmax>d/2τ_<jmax>, and its value is about 0.08〜0.18 kg/mm^2. In those formulae, σ_c is the tensile strength of the composite, V_f the volume content of glass fibres, l_c the critical length, l the fibre length, σ_<fmax> the tensile strength of fibre, σ_<m1> the tensile strength of matrix at the breaking strain of fibre and d the diameter of fibre. The value of τ_<jmax>, obtained experimentally here to be 0.08〜0.18 kg/mm^2, decreases with increasing fibre length, and is far lower than the shearing strength of matrix or that of joint between glass plate and polystylene knob.
社団法人日本材料学会の論文
1973-05-15