CEGB ASSESSMENT PROCEDURE FOR DEFECTS IN PLANT OPERATING IN THE CREEP RANGE
CEGB ASSESSMENT PROCEDURE FOR DEFECTS IN PLANT OPERATING IN THE CREEP RANGE
复制标题
针对蠕变范围内运行的工厂缺陷的 CEGB 评估程序
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
G. Neate
中科院分区：
文献类型：
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作者：
R. Ainsworth;G. Chell;M. Coleman;I. Goodall;D. J. Gooch;J. Haigh;S. Kimmins;G. Neate
近年来，在解决高温下缺陷行为的研究工作中取得了相当大的进展。在结构评估技术和分析代表性材料数据的方法方面都取得了进展。在这些发展的基础上，已经在CEGB内产生了一个程序，用于评估在蠕变范围内运行的设备在蠕变而不是蠕变疲劳是主要失效机制的载荷下的缺陷。本文介绍了CEGB程序。计算需要三个事件：整体结构故障的时间连续损伤机制;孵化前裂纹扩展的时间;和时间为随后的增长到最大可容忍的缺陷尺寸。方法计算这些时间，并获得所需的材料数据进行计算。
In recent years considerable progress has been made in research work addressing the behaviour of defects at elevated temperature. Developments have been made both in structural assessment techniques and in methods for analysing representative materials data. On the basis of these developments a procedure has been produced within the CEGB for the assessment of defects in plant operating in the creep range under loadings for which creep rather than creep-fatigue is the dominant failure mechanism. This paper describes the CEGB procedure. Calculations are required for three events: the time for overall structural failure by continuum damage mechanisms; the time for incubation prior to crack extension; and the time for subsequent growth to a maximum tolerable defect size. Methods are presented for calculating these times and for obtaining the materials data required to perform the calculations.