前言随着断裂力学在工程上的应用和发展,传统的对构件内缺陷的评定标准(质量管理标准或质量控制标准)已满足不了要求,从而各国相继产生了新的标准,即“适合使用要求的缺陷评定标准”。我国目前也在着手编制这类标准。随着这种新标准的出现,给探伤人员提出了新的要求,即要准确测定缺陷的实际状态,特别是其长度和高度,从而促使了探伤人员在探伤技术上进行改革,寻求新的方法。我厂在对液态烃球罐修复中,在钢铁研究总院的协助下,进行了球罐的缺陷分析、断裂安全分析等,提出了球罐的修复方案,进行了 Preface With the application and development of fracture mechanics in engineering, the traditional evaluation criteria (quality management standards or quality control standards) of defects in components can not meet the requirements, thus all countries have successively set new standards, that is, “suitable for use requirements Defect evaluation standards. ” My country is also currently preparing such standards. With the advent of this new standard, new requirements have been put on the inspectors, that is, to accurately determine the actual state of defects, especially their length and height, prompting the inspectors to reform their testing techniques and seek new methods . I plant in the liquid hydrocarbon spherical tank repair, with the assistance of Steel Research Institute, conducted a ball tank defect analysis, fracture safety analysis, put forward a spherical tank repair program, carried out