| Estimation of J—R Curves for Small-Sized COEC Specimens and Its Application Considering Crack-Tip Cons tr aints |
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| 引用本文： | G.W.He,C.Bao,L.X.Cai,Y.J.Wu. Estimation of J—R Curves for Small-Sized COEC Specimens and Its Application Considering Crack-Tip Cons tr aints[J]. Acta Mechanica Solida Sinica, 2019, 32(3): 261-276 |
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| 作者姓名： | G.W.He C.Bao L.X.Cai Y.J.Wu |
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| 作者单位： | Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province |
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| 基金项目： | This work is financially supported by the National Natural Science Foundation of China |
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| 摘 要： | The normalization method has been employed to estimate the J-resistance (J—R) curves for C-shaped outside edge-notched compression (COEC) specimens of SA-508 steel. The COEC specimens present the lowest J—R curves in comparison with other three types of specimens. Based on the J—Q—M met hod, the constraint parame ter Q determined at the mid-plane in the through-thickness direction of the specimen is used to approximately quantify the threedimensional crack-tip constraint for COEC specimens. Combining with the previous experiments on J—R curves, the constraint-coirected J—R curves for SA-508 steel specimens are given, which may be used to predict the fracture toughness of actual cracked components in structural integrity assessment.
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| 关 键 词： | DUCTILE fracture toughness COEC specimen DIMENSIONLESS load separation principle Normalization METHOD CRACK-TIP constraint J-Q-M METHOD |
Estimation of J-R Curves for Small-Sized COEC Specimens and Its Application Considering Crack-Tip Constraints |
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