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|Title:||A hybrid approach to determine ductile fracture resistance|
|Authors:||Qian, X. |
|Citation:||Qian, X., Yang, W. (2011). A hybrid approach to determine ductile fracture resistance. Procedia Engineering 10 : 319-324. ScholarBank@NUS Repository. https://doi.org/10.1016/j.proeng.2011.04.055|
|Abstract:||This article describes a hybrid approach to determine the ductile fracture resistance for laboratory specimens, combining both the numerically computed and experimentally measured load (P) versus load-line displacement (LLD) relationships for metallic fracture specimens. The hybrid approach employs the same principle as the conventional, multiple-specimen experimental method in determining the energy release rate. This method computes the P-LLD curves from multiple finite element (FE) models, each with a different crack depth. The experimental procedure measures the P-LLD curve from a standard fracture specimen with a growing crack. The intersections between the experimental P-LLD curve and the numerical P-LLD curves from multiple FE models dictate the LLD levels to compute the strain energy (U) using the area under the numerical P-LLD curves. This approach eliminates the requirement of using multiple fracture specimens and the requirement of measuring the compliance of the specimen via a multiple unloading procedure. In addition, this approach does not require the measurement of the crack-mouth opening displacement (CMOD). The validation procedure shows very accurate prediction of the J-Δa resistance curve for SE(B) specimens under mode I loading. © 2011 Published by Elsevier Ltd.|
|Source Title:||Procedia Engineering|
|Appears in Collections:||Staff Publications|
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