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引用次数: 0
摘要
EN 1993-1-10 中包含了避免脆性断裂的钢材质量等级选择表。此前尚未对该方法的保守性进行统计分析。该方法最初的验证基本上是基于对 19 个双边缘开裂试样测试的确定性评估。这种验证方法没有考虑到约束效应等因素，对名义数据和测量数据的处理也不尽人意。因此，在此使用有关 Charpy-V 与断裂韧性相关性的最新信息以及对约束效应的定量评估，对该程序的可信度进行统计检验。这项研究有两个主要目的。首先，提出一种方法，通过这种方法可以为 EN 1993-1-10 这样的标准制定出一致的统计定义标准；其次，对当前方法中包含的保守性进行近似估算。统计处理方法同样适用于最初用于验证该方法的 19 个试样。
A statistical interpretation of the EN 1993-1-10 brittle fracture criteria
EN 1993-1-10 contains tables for selection of steel quality class with respect to avoidance of brittle fracture. The conservatism of the method has not previously been examined statistically. The original verification of the method has been established basically on a deterministic assessment of 19 double edge cracked specimen tests. This verification has not accounted for e.g. constraint effects and the treatment of nominal data versus measured data is not fully satisfactory. Therefore, here the confidence of the procedure is examined statistically using more up to date information regarding the Charpy-V vs fracture toughness correlation and a quantitative assessment of the constraint effect. The study has two main purposes. First, to present a method by which consistent statistically defined criteria for a standard like EN 1993-1-10 can be developed and second, to obtain an approximate estimate of the conservatism contained in the present methodology. The statistical treatment is applied to the same 19 specimens originally used for the verification of the method.
期刊介绍：
EFM covers a broad range of topics in fracture mechanics to be of interest and use to both researchers and practitioners. Contributions are welcome which address the fracture behavior of conventional engineering material systems as well as newly emerging material systems. Contributions on developments in the areas of mechanics and materials science strongly related to fracture mechanics are also welcome. Papers on fatigue are welcome if they treat the fatigue process using the methods of fracture mechanics.
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