纤维从弹性基体中的脱粘和拔出

DEBONDING AND PULL-OUT OF FIBRE FROM AN ELASTIC MATRIX

本文分析了纤维从弹性基体中的脱粘与拔出,得到纤维初始脱粘应力。完全脱粘应力和纤维拔出应力与嵌入纤维长度的非线性函数关系,该理论经钢丝一环氧拔出试验验证,结果表明,当嵌入纤维长度较大时纤维初始脱粘应力趋向于一常数;完全脱粘应力随嵌入纤维长度的增加而增加,最后达到一个稳定状态:纤维拔出应力随嵌入纤维长度非线性地增加。

Debonding and pull-out of fibre from an elastic matrix were analysed. The nonlinear functions of initial debonding stress, complete debonding stress as well as pull-out stress of fibre and embedded fibre length were obtained. It has been certified by the existing pull-out test of steel wires from an epoxy matrix. And it has been shown that the initial debonding stress of fibre approaches a constant when the embedded fibre length is comparatively large; the complete debonding stress of fibre increases with the increase in the embedded fibre length and gets to a steady state finally; the pull-out stress of fibre increases with the embedded fibre length.