This paper investigates whether the Weibull parameters of the new local approach model for cleavage fractures are affected by the geometric size of the specimen. Based on the fracture test data of A508-C steel, low temperature round notched bar tensile specimens of A508-C steel with two different notch sizes are numerically simulated by using finite element analysis software ABAQUS, and the stress distributions are obtained. The Weibull parameters of two notched bars are calibrated by linear regression method. The results show that the Weibull parameters of the specimens with different notch sizes are different. This suggests that the calibration parameters are dependent on the notch size.

中文翻译：

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解理断裂新局部逼近模型标定参数大小相关性研究

本文研究了解理断裂新局部逼近模型的威布尔参数是否受试样几何尺寸的影响。以A508-C钢的断裂试验数据为基础，利用有限元分析软件ABAQUS对两种不同缺口尺寸的A508-C钢低温圆缺口棒材拉伸试样进行数值模拟，得到应力分布。两个缺口条的威布尔参数通过线性回归方法校准。结果表明，不同缺口尺寸试件的威布尔参数不同。这表明校准参数取决于凹口尺寸。