断裂(地质)
弯曲
材料科学
梁(结构)
断裂韧性
缩放比例
点(几何)
断裂力学
非线性系统
算法
压力(语言学)
结构工程
复合材料
作者
Mohammad Karamlooa,Moosa Mazloom
出处
期刊:Computers and Concrete
日期:2018-07-01
卷期号:22 (1): 039-
被引量:3
标识
DOI:10.12989/cac.2018.22.1.039
摘要
This study introduces a new algorithm to determine size independent values of fracture energy, fracture toughness, and fracture process zone length in three-point bending specimens with shallow to deep notches. By using the exact beam theory, a concept of equivalent notch length is introduced for specimens with no notches in order to predict the peak loads with acceptable precisions. Moreover, the method considers the variations of fracture process zone length and effects of higher order terms of stress field in each specimen size. In this paper, it was demonstrated that the use of some recently developed size effect laws raises some concerns due to the use of nonlinear regression analysis. By using a comprehensive fracture test data, provided by Hoover and Bazant, the algorithm has been assessed. It could be concluded that the proposed algorithm can facilitate a powerful tool for size effect study of three-point bending specimens with different notch lengths.
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