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首页> 外文会议>Symposium on Methods for the Assessment of Structural Integrity of Components and Structures; 20010425; Cambridge; GB >Recent Developments in Methodology for Fracture Mechanics Assessments
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Recent Developments in Methodology for Fracture Mechanics Assessments

机译：断裂力学评估方法学的最新进展

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摘要

Fracture mechanics is a discipline that seeks to predict the behaviour of bodies containing crack-like (planar) defects under load. Engineers routinely carry out defect assessments to assess the integrity or fitness for purpose of structures or components whose failure would have unacceptable safety or economic consequences. The development and validation of defect assessment methodology is therefore an important aspect of fracture mechanics research. The predictions of a given methodology are validated by comparing them with failure data from large-scale tests specially designed to simulate specific structural features. Within this context, two recent international programmes have helped to validate defect assessment methodology: 1. NESC 1 Spinning Cylinder Test (simulation of reactor pressure vessel integrity under pressurised thermal shock conditions) 2. BIMET (structural integrity of dissimilar metal welds) Each of these has considered specific structural features to investigate the transfer-ability of data obtained from tests on laboratory-scale specimens in predicting the fracture behaviour of components under complex conditions. The purpose of the present paper is to describe these programmes and their main results, and highlight their benefits. In particular, it is shown that although the programmes address issues that are important to the nuclear power industry, their results are relevant to the development of defect assessment methodology more generally.
机译：断裂力学是一门试图预测载荷作用下包含裂纹（平面）缺陷的物体行为的学科。工程师会定期进行缺陷评估，以评估其结构或部件的完整性或适用性，以免其失效会给安全或经济带来不可接受的后果。因此，缺陷评估方法的开发和验证是断裂力学研究的重要方面。通过将给定方法学的预测与专门设计用于模拟特定结构特征的大规模测试的失败数据进行比较，可以验证给定方法的预测。在这种情况下，最近的两个国际计划已帮助验证缺陷评估方法：1. NESC 1旋转圆筒测试（在加压热冲击条件下模拟反应堆压力容器的完整性）2. BIMET（异种金属焊缝的结构完整性）为了预测复杂条件下部件的断裂行为，已考虑了特定的结构特征以调查从实验室规模的样本测试获得的数据的传递能力。本文的目的是描述这些程序及其主要结果，并强调它们的好处。特别是，可以看出，尽管这些计划解决了对核电工业重要的问题，但其结果与缺陷评估方法的发展更普遍有关。

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