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.
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。
The evolution of damage is determined by damage hardening condition, failure occurs when the hardening of damage reaches its critical value.
损伤演变由损伤强化条件决定，当损伤强化达到临界值时，混凝土发生破坏。
The evolution of damage is determined by damage hardening condition, failure occurs when the hardening of damage reaches its critical value.
损伤演变由损伤强化条件决定，当损伤强化达到临界值时，混凝土发生破坏。
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