Ⅰ型裂纹尖端无位错区近场的微观断裂模型

Micro Fracture Model near the DFZ of Model Ⅰ Crack Tip

经微观实验及在位错理论的基础上建立了Ⅰ型裂纹尖端无位错区（ＤＦＺ）近场的微观断裂模型，对其进行了数值计算．

According to TEM experiment and dislocation theory, micro fracture model for plastic zone near the DFZ of model Ⅰ crack tip was established. Results of numerical calculation show that the position where dislocation density become maximum is the same as where the void nucleated.