強化繊維の引抜きにおける特異応力場の強さの解析

抄録

In this study, a 2D model of a reinforced fiber is considered in matrix under pull-out force. Here, two intensities of singular stress fields (ISSF) are discussed appearing at the fiber end A and the intersection point E of the fiber and the surface. The analysis method focuses on the FEM stress at point A and E applying the same FEM mesh pattern to the unknown and reference models. To analyze the ISSF at A, the body force method solution is used as the reference model. To analyze the ISSF at E, the reciprocal work contour integral method (RWCIM) solution is used as the reference model. Then the two ISSFs are compared and discussed by varying the fiber bonded length lin. When lin is shorter, the ISSF at A is larger than the ISSF at E. When lin is longer, the ISSF at E is larger than the ISSF at A.