Numerical analysis of mixed mode I/II stress intensity factors of edge slant cracked plates

Fayed, Alaa

doi:10.5267/j.esm.2016.8.001

Cited by 24 publications

(18 citation statements)

References 25 publications

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“…Cracks grow favourably in mode I rather than shear mode or mixed mode. Many investigations have typically focused in the opening mode of crack extension . However, cracks in brittle materials are often subjected to compressive loading rather than tensile loading .…”

Section: Introductionmentioning

confidence: 99%

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Modes I/II SIF of a diametrically compressed Brazilian disc having a central inclined crack with frictional surfaces

Hammouda

Fayed

2017

Fatigue Fract Eng Mat Struct

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An in‐house finite element code was used to analyse a diametrically compressed isotropic homogeneous Brazilian disc having a central inclined crack with frictional surfaces for the evaluation of its corresponding modes I and II stress intensity factor (SIF). One‐half of the disc was successfully idealized. The coefficient of friction between the crack surfaces ranged from 0 to 1 in steps of 0.1. Relative crack length ratios of 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, and 0.7 were analysed with crack angles up to 90° in steps of 5°. The crack angle corresponding to the transition from a mixed mode I/II to a pure mode II decreases with increasing the relative crack length ratio. An increase in the relative crack length ratio leads to an increase in the range of crack angles corresponding to a partially closed crack. The crack angle at which fully closed sliding crack surfaces commences is 30° independent of the relative crack length ratio and the friction coefficient. With the same relative crack length ratio and increasing the friction coefficient, there is a corresponding decrease in the crack angle for the maximum mode II SIF. With a decrease in the relative crack length ratio or the friction coefficient, the crack angle beyond which the crack surfaces become in a fully sticking mode decreases resulting in zero mode II SIF. Generally, mode II SIF decreases with increasing the friction coefficient between the crack surfaces. Good agreement has been generally obtained with relevant results found in the literature.

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Section: Introductionmentioning

confidence: 99%

“…Many investigations have typically focused in the opening mode of crack extension. [1][2][3][4][5][6][7][8] However, cracks in brittle materials are often subjected to compressive loading rather than tensile loading. 9 Many applications of such materials show mixed mode I/II and/ or pure mode II fracture.…”

Section: Introductionmentioning

confidence: 99%

Modes I/II SIF of a diametrically compressed Brazilian disc having a central inclined crack with frictional surfaces

Hammouda

Fayed

2017

Fatigue Fract Eng Mat Struct

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“…Different researchers have utilized various fracture tests and analysis methods for better understanding of the fracture behavior and cracking mechanisms in AC materials. Single-edge notched beam (SENB) test [16][17][18], double-edged notched tension (DENT) test [19], disk shaped compact tension (DCT) test [20][21][22], Edge notched disc bend (ENDB) test [23][24][25][26][27], and semicircular bend (SCB) test [28][29][30][31][32][33][34][35][36][37], are to name a few. Disc-shaped compact tension (ASTM D7313-07a) and semicircular bending (SCB) tests [29,[38][39][40][41][42] are among the frequently used fracture specimens for evaluating fracture behavior of asphalt concretes.…”

Section: Introductionmentioning

confidence: 99%

The effect of loading rate on fracture energy of asphalt mixture at intermediate temperatures and under different loading modes

Aliha

Fakhri

Kharrazi

et al. 2017

Frattura Ed Integrità Strutturale

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At intermediate service temperatures hot mix asphalt (HMA) concretely are subjected to different loading rates due to movement of vehicles which can significantly affect their mechanical characteristics and final service load. Hence, in this paper the effect of loading rate on intermediate temperature fracture resistance of HMA materials is investigated experimentally in different modes of cracking. Different hot mix asphalt mixtures made of various compositions were subjected to asymmetric threepoint bend loading in the form of edge cracked semi-circular bend (SCB) specimens. The effect of aggregate type and air void were studied on the fracture energy values for three mode mixities (including pure mode I, mixed mode I/II and pure mode II) and at different temperatures of 5°C, 15°C and 25°C. Trends of change in fracture energy values revealed noticeable influence of loading rate on the low and intermediate temperature cracking behavior of tested asphalt mixtures with different air void contents and aggregate types subjected to mixed mode I/II loading. Also, a change observed in fracture resistance of asphalt mixtures at nearly zero (5°C) and intermediate temperatures (25°C) that was due to change in the behavior of bitumen from elastic to viscoelastic.

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“…The fracture toughness of brittle materials is reduced due the existence of pre-existing cracks (Kato & Nishioka, 2005). Intensive theoretical and experimental studies have frequently devoted their effort to brittle failure in engineering structures and components with cracks and/or notches Aliha et al, 2014Aliha et al, , 2016Ayatollahi et al, 2015;Fakhri et al, 2017;Fayed, 2008Fayed, , 2017Fayed et al, 2008;Hammouda et al, 2003aHammouda et al, , 2004Hammouda et al, , 2002Razmi & Mirsayar, 2017;Wei et al, 2016Wei et al, , 2017a. It was experimentally noticed that crack extension occurred in mode I rather than shear mode or mixed mode.…”

Section: Introductionmentioning

confidence: 99%

Numerical evaluation of mode I/II SIF of quasi-brittle materials using cracked semi-circular bend specimen

Fayed¹

2018

10.5267/j.esm

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An in-house finite element code was utilized to evaluate mode I/II stress intensity factor (SIF) of an edge cracked semi-circular disc subjected to three-point bending. The specimen was considered as an isotropic and homogeneous material. Relative span length ratios of 0.3 to 0.8 in steps of 0.1 were invoked. Relative crack length ratios of 0.1, 0.2, 0.3, 0.4, 0.5 and 0.6 were analyzed with crack angles up to 60° in steps of 5°. At the same crack length, mode I SIF decreases with increasing crack angle or decreasing the span length. The range of pure mode II decreases with increasing the span length. For the same crack length, the crack angle corresponding to the transition from a mixed mode I/II to a pure mode II increases with increasing the relative span length ratio. On the contrary, that angle decreases with increasing the crack length for the same span length. Good agreement has been generally obtained with relevant results found in the literature.

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Numerical analysis of mixed mode I/II stress intensity factors of edge slant cracked plates

Cited by 24 publications

References 25 publications

Modes I/II SIF of a diametrically compressed Brazilian disc having a central inclined crack with frictional surfaces

Modes I/II SIF of a diametrically compressed Brazilian disc having a central inclined crack with frictional surfaces

The effect of loading rate on fracture energy of asphalt mixture at intermediate temperatures and under different loading modes

Numerical evaluation of mode I/II SIF of quasi-brittle materials using cracked semi-circular bend specimen

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