2018
DOI: 10.1111/ffe.12921
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Notch ductile failure with significant strain‐hardening: The modified equivalent material concept

Abstract: The equivalent material concept (EMC) assumes that the ductile material has a valid K‐based fracture toughness (KIc or Kc). For ductile materials with significant strain‐hardening, no valid KIc or Kc is determined by the standard experiments and, hence, EMC seems null. The modified EMC (MEMC) is proposed in this study by which a virtual Kc value is defined and computed for the ductile material with significant strain‐hardening. In this way, Mode I and mixed Mode I/II fracture behaviors of U‐notched aluminum al… Show more

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Cited by 24 publications
(33 citation statements)
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References 36 publications
(116 reference statements)
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“…In the latter case, the EMC-ASED criterion would provide good predictions as long as such a given radius is not reached, but once it is exceeded, the fracture analysis of notched materials using the ASED criterion would require its combination with other tools different from the EMC. Some possibilities could be new formulations or forms for the EMC [26], the modified EMC (MEMC) [27] or the Fictitious Material Concept (FMC) [13].…”
Section: Discussionmentioning
confidence: 99%
“…In the latter case, the EMC-ASED criterion would provide good predictions as long as such a given radius is not reached, but once it is exceeded, the fracture analysis of notched materials using the ASED criterion would require its combination with other tools different from the EMC. Some possibilities could be new formulations or forms for the EMC [26], the modified EMC (MEMC) [27] or the Fictitious Material Concept (FMC) [13].…”
Section: Discussionmentioning
confidence: 99%
“…In order to meet the above‐mentioned design requirements, it is critical to achieve the accurate calculation of fatigue strength or lifetime, rather than using empirical methods or life divergence coefficients, which might greatly reduce the optional design space for engineering components . This is particularly important when considering the notch effect on the fatigue resistance of components, which varies considerably with notch geometric features . Under external loads, geometric discontinuities unavoidably raise stress concentrations as well as complex stress‐strain responses within the structure, in which the structural geometry suddenly changes (see Figure ) and thus result in complex fatigue problems and induce surface fatigue cracks, even under conditions of inconspicuous plastic deformation .…”
Section: Introductionmentioning
confidence: 99%
“…[6][7][8][9] This is particularly important when considering the notch effect on the fatigue resistance of components, which varies considerably with notch geometric features. [10][11][12][13] Under external loads, geometric discontinuities unavoidably raise stress concentrations as well as complex stress-strain responses within the structure, in which the structural geometry suddenly changes (see Figure 1) and thus result in complex fatigue problems and induce surface fatigue cracks, even under conditions of inconspicuous plastic deformation. [14][15][16] According to this, the complete understanding of notch effect is pivotal to ensure safety and durability of engineering components.…”
Section: Introductionmentioning
confidence: 99%
“…Moreover, in another study, due to the high strain energy density, fracture of the AA5083 aluminum alloy plates weakened by U-notches under mixed mode I/II loading was assessed by FMC. 8 Based on the evaluation performed with the help of fracture tests, the combination of MS and MTS criteria with FMC was reported to be successful in. 8 Fracture of the AISI 304 Vnotched plates under mixed mode I/II loading was also investigated using FMC in combination with the criteria of MS and MTS.…”
Section: Introductionmentioning
confidence: 99%
“…8 Based on the evaluation performed with the help of fracture tests, the combination of MS and MTS criteria with FMC was reported to be successful in. 8 Fracture of the AISI 304 Vnotched plates under mixed mode I/II loading was also investigated using FMC in combination with the criteria of MS and MTS. 9 The fracture load values estimated by the method had a good accuracy compared to the values measured in the fracture tests.…”
Section: Introductionmentioning
confidence: 99%