The critical aspect ratio of the fiber is defined as the cross-point of the tangent value of the inflexion and the asymptote of the maximum elastic modulus.

• 将与曲线拐点切线和最大值水平直线交点相对应的长径比值定义为纤维临界长径比,将与此相对应的函数值定义为弹性模量临界值。