潜艇结构材料低周疲劳的损伤力学分析

Damage Mechanical Analysis of Low-Cycle Fatigue Life in Material of Submarine Structure

采用损伤力学的观点和方法，分析在局部区域内（焊缝区）材质劣化对疲劳的影响，给出疲劳寿命减少系数ＫＤ ，在损伤条件下计算潜艇的低周疲劳寿命．

Based on damage mechanics method,the effect of material damage in local region(weld bead)on fatigue life is analyzed.The decrease coefficient of fatigue life K D is given.The low-cycle fatigue life of submarine structure is calculated under the condition of damage.