提出了一种新的损伤定义及测量方法，确定了金属材料的损伤临界值，并进一步证明了金属材料的损伤就是金属材料的塑性变化。
A new definition and measurement method of damage is put forward, the damage critical value of metal is determined and it is proved that damage of metal is exactly the plastic change of metal.
这定义了临界值规则实作的介面。
This defines the interface to a threshold rule implementation.
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。
The critical aspect ratio of the fiber is defined as the crosspoint of the tangent value of the inflexion and the asymptote of the maximum elastic modulus.
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