利用孕育时间准则建立金属从弹性到塑性状态的转变模型,这种方法类似于在St.-Petersburg State University发展起来的脆性固体断裂的结构暂存理论.该方法可使我们建立模型,很好地分析和解释材料随温度变化发生的屈服应力演化、韧-脆性失效转变及其他效应等特殊的力学现象. A model of transition from elastic to plastic state is established using the gestation time criterion, which is similar to the structure-temporary theory of brittle solid fracture developed at St.-Petersburg State University, which allows us to model well Analysis and interpretation of the material with the temperature changes occur yield stress evolution, ductile-brittle failure and other effects and other special mechanical phenomena.