Theory and analysis of environment assisted cracking in solids

环境辅助开裂是指固体由于应力状态与环境的相互作用而发生断裂的一系列现象，包括应力腐蚀开裂和腐蚀疲劳。EAC一直是核电站、飞机和管道结构故障的主要原因。特别是，应力腐蚀开裂是加拿大许多代价高昂的石油和天然气管道故障的原因。包含机械和电化学相互作用及其在固体降解中的作用的量化框架将通过启用预测性建模工具来减少此类故障的发生：(I)评估损伤容忍度；(Ii)识别非破坏性检查的关键区域；以及(Iii)生成改进的设计标准。

Environment Assisted Cracking (EAC) refers to a broad spectrum of phenomena, including stress corrosion cracking and corrosion fatigue, in which a solid fractures due to the concomitant interaction of its stress state with its environment. EAC has been the primary cause of structural failures in nuclear power plants, aircraft, and pipelines. In particular, stress corrosion cracking has been responsible for many costly oil and gas pipeline failures in Canada. A quantitative framework encompassing mechanical and electrochemical interactions and their role in the degradation of solids will reduce the occurrence of such failures by enabling predictive modeling tools for: (i) assessing tolerance for damage, (ii) identifying critical areas for nondestructive inspection, and (iii) generating improved criteria for design.