Fracture study in notched ductile polymeric plates subjected to mixed mode I/II loading: Application of equivalent material concept

Rahimi, A.S.; Ayatollahi, M.R.; Torabi, A.R.

doi:10.1016/j.euromechsol.2018.01.009

Cited by 31 publications

(12 citation statements)

References 32 publications

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“…The concentration of the curing agent has the main effects on the mechanical properties of the ultimate polymer (D’Almeida and Monteiro 1996). Therefore, based on the previous works (Torabi et al., 2017; Rahimi et al., 2018a, 2018b), a mixture with 50 wt% hardener concentration, having high ductility and appropriate strength, is selected for fabricating the USCB specimens.…”

Section: Methodsmentioning

confidence: 99%

“…Another parameter, which has significant effects on the stress–strain curve of the polymeric material, is the strain rate (Gensler et al., 2000). According to the previous reports (Torabi et al., 2017; Rahimi et al., 2018a, 2018b), the best choice for the present study is the strain rate of 1 mm/min. Hence, all the fracture tests on the USCB specimens are performed at the strain rate of 1 mm/min.…”

Section: Methodsmentioning

confidence: 99%

“…It has been shown in some research that EMC could be successfully combined with various brittle fracture models, including the averaged strain energy density (ASED) criterion (Torabi et al., 2016, 2018), the maximum tangential stress (MTS) and mean stress (MS) criteria (Torabi, 2012; Torabi and Alaei, 2015), the J-integral criterion (Majidi et al., 2018), and the theory of critical distances (TCD) (Cicero et al., 2017), to estimate the ductile fracture in notched members. To the best of the authors’ knowledge, concerning ductile fracture of epoxy materials weakened by notches, only their own papers are available in the literature (Torabi et al., 2017; Rahimi et al., 2018a, 2018b). It has been well demonstrated in Torabi et al.…”

Section: Introductionmentioning

confidence: 99%

“…(2017) and Rahimi et al. (2018a, 2018b) that EMC can be successfully linked to MTS and MS criteria in order to predict the LCCs of notched ductile epoxy resin specimens under pure mode I and mixed mode I/II loadings.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Elastic–plastic damage prediction in notched epoxy resin specimens under mixed mode I/II loading using two virtual linear elastic failure criteria

Rahimi

Ayatollahi

Torabi

2020

International Journal of Damage Mechanics

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Elastic–plastic damage of a ductile epoxy resin is investigated for the first time in the configuration of semicircular bend specimen weakened by U-shaped notches under mixed mode I/II loading conditions. U-notched specimens are prepared from the characterized epoxy material with different notch rotation angles and notch tip radii. Load-carrying capacities of the U-notched specimens are experimentally obtained by performing fracture tests under various combinations of mode I and mode II loading. The reformulated Equivalent Material Concept is employed for the polymeric material in conjunction with the maximum tangential stress and mean stress criteria to provide the theoretical predictions without any necessity for elastic–plastic analyses of their damage. Scanning electron microscopy micrographs are also taken from the fracture surfaces and utilized for realizing the micromechanical processes of damage in the tested specimens. A very good consistency is found between the experimental results and the predictions of the combined Equivalent Material Concept-maximum tangential stress criterion, as well as those of the Equivalent Material Concept-mean stress criterion.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Elastic–plastic damage prediction in notched epoxy resin specimens under mixed mode I/II loading using two virtual linear elastic failure criteria

Rahimi

Ayatollahi

Torabi

2020

International Journal of Damage Mechanics

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“…However, for β = 60°, a converse trend is seen. It has been demonstrated in Rahimi et al by using FE analyses that the main reason for this interesting trend is the decrease of the effective ligament, leading to increase of the stresses on the notch plane.…”

Section: Methodsmentioning

confidence: 99%

Notch ductile failure with significant strain‐hardening: The modified equivalent material concept

Torabi

Kamyab

2018

Fatigue Fract Eng Mat Struct

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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 alloy 5083 are assessed in the view points of experiments and theories. Several U‐notched rectangular samples are used for performing the experiments and obtaining the failure loads. Then, the MEMC is coupled with the maximum tangential stress and mean stress criteria and utilized to predict the failure loads theoretically. Finally, it is shown that both the MEMC‐stress‐based criteria can provide very good predictions of the test data.

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Mixed mode І/ІІ fracture prediction of blunt V-notched nanocomposite specimens with nonlinear behavior by means of the Equivalent Material Concept

Torabi

Rahimi

Ayatollahi

2018

Composites Part B: Engineering

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Fracture study in notched ductile polymeric plates subjected to mixed mode I/II loading: Application of equivalent material concept

Cited by 31 publications

References 32 publications

Elastic–plastic damage prediction in notched epoxy resin specimens under mixed mode I/II loading using two virtual linear elastic failure criteria

Elastic–plastic damage prediction in notched epoxy resin specimens under mixed mode I/II loading using two virtual linear elastic failure criteria

Notch ductile failure with significant strain‐hardening: The modified equivalent material concept

Mixed mode І/ІІ fracture prediction of blunt V-notched nanocomposite specimens with nonlinear behavior by means of the Equivalent Material Concept

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