破前漏(LBB)分析技术及临界裂纹计算方法

• 作 者: 刘佳 余华金 王月英
• 机 构: 中国实验快堆工程部,
• 出 处: 中国原子能科学研究院年报
• 发表日期: 2011年00期
• 关键词: LBB 微观变化 分子动力学 塑性断裂 原子尺度 分析技术 计算方法 位移场 弹塑性断裂力学 裂纹扩展

目前核电站设计中广泛应用的LBB技术,在国外得到了很好的发展,但国内研究应用相对较少。在LBB分析中,对裂纹扩展的研究是其核心。随着科学研究的深入可发现裂纹的萌生和扩展实际上是原子变化,导致位错等微观变化产生,最终导致材料破损的宏观结果。经典的弹塑性断裂

LBB technology widely used in the design of nuclear power plants has been well developed abroad, but relatively few domestic research and applications. In the LBB analysis, the study of crack propagation is at the heart of it. With the deepening of scientific research, it can be found that the initiation and propagation of cracks are actually atomic changes, resulting in the microscopic changes such as dislocation, which eventually lead to the macroscopic result of material damage. Classic elasto-plastic fracture