“破前漏”评估技术在激光辐照压力柱壳中的应用  

Leak-before-burst criteria applied to a pressurized cylindrical shell irradiated by a high-energy laser

作　　者：王玉恒[1] 束庆邦[1] 刘峰[1] 丁升[1] 郝雁[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《激光杂志》2008年第2期63-65,共3页Laser Journal

摘　　要：激光辐照在充内压圆柱壳体引起的破坏与萌生裂纹的扩展行为密切相关。本文尝试将"破前漏"(LBB)分析方法应用在激光辐照压力柱壳的断裂力学行为评价上,对激光辐照裂纹萌生后的扩展行为进行了讨论。考虑断裂韧性在温度加载条件下的变化规律,给出LBB分析中裂纹扩展的评价条件,并对结构可能出现的破坏模式进行了讨论。The damage of the pressurized cylindrical shell induced by laser irradiated is related to the crack propagation. Leak- Before- Burst {LBB） analysis is applied to evaluate fracture behavior of the pressurized cylindrical shell irradiated by a High - Energy Laser. And the effects of the initiation and propagation of the crack are analyzed. Considering relation between fracture toughness and temperature, the condition of crack growth is presented. The possible failure modes are investigated by using LBB theory.

关 键 词：激光辐照 LBB准则 裂纹扩展 内压柱壳 

分 类 号：TN248.1[电子电信—物理电子学] O343.5[理学—固体力学]