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|Title:||A hybrid approach to determine fracture resistance for mode i and mixed-mode i and II fracture specimens|
|Authors:||Qian, X. |
|Citation:||Qian, X., Yang, W. (2011-05). A hybrid approach to determine fracture resistance for mode i and mixed-mode i and II fracture specimens. Fatigue and Fracture of Engineering Materials and Structures 34 (5) : 305-320. ScholarBank@NUS Repository. https://doi.org/10.1111/j.1460-2695.2010.01519.x|
|Abstract:||This paper proposes a hybrid approach to determine the fracture resistance for mode I and mixed-mode I and II fracture specimens, combining both numerically computed and experimentally measured load (P) versus load-line displacement (LLD or Î) relationships for metallic fracture specimens. The hybrid approach predicates on the same principle as the conventional, multiple-specimen experimental method in determining the energy release rate. The hybrid method computes the P-Î curves from multiple finite element (FE) models, each with a different crack depth. The experimental procedure measures the P-Î curve from a standard fracture specimen with a growing crack. The intersections between the experimental P-Î curve and the numerical P-Î curves from multiple FE models dictate the LLD levels to compute the strain energy (U) using the area under the numerical P-Î curves. This method provides accurate estimates of the J resistance data for both SE(B) specimen under mode I loading and single-edge notched specimens under mixed-mode I and II loading. © 2010 Blackwell Publishing Ltd.|
|Source Title:||Fatigue and Fracture of Engineering Materials and Structures|
|Appears in Collections:||Staff Publications|
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