柔軟樹脂で繊維端を被覆した短繊維強化複合材料の弾性シアラグ解析

概要

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This paper presents a shear lag analysis which enables us to calculate stress distribution in short fiber reinforced composites with soft resin coating at the end of fibers or fiber bundles. Stress distributions are obtained for the following two cases; the fiber is bonded (Case A) and debonded (Case B) with matrix resin at the fiber ends. Finite element analysis is employed to verify the validity of the present analysis. It is confirmed that shear stress at the fiber/matrix interface is relaxed by the soft coating resin while the axial stress in the fiber decreases in both cases. Width and shear modulus of coating resin have larger influence on relaxation of stress concentration than its length. Shear stress distribution predicted using the shear lag analysis is in fairly good agreement with the finite element calculation.
2005-03-25