Criterion for brittle fracture of notched or cracked specimens based on combined micro- and macro crack mechanics—II

Yokobori, Takeo; Sawaki, Yozo; Nakanishi, S.

doi:10.1016/0013-7944(79)90069-9

Cited by 9 publications

(4 citation statements)

References 7 publications

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“…DISFRAC aggregates the pileups in a given particle with a single slip band comprised of glide edge dislocations following the techniques of Yokobori and colleagues [9][10][11][12] . DISFRAC employs a distribution of infinitesimal dislocations, rather than discrete dislocations.…”

Section: Dislocation Mechanicsmentioning

confidence: 99%

“…Yokobori et al, [9][10][11][12] developed a technique to compute stress intensity factors for a crack and slip band in interaction with each and an applied stress field. The crack consists of both a climb dislocation distribution, ( ), and a glide dislocation distribution ( ) A distribution of glide dislocations ( ) comprises the slip band.…”

Section: Yokobori Dislocation Analysismentioning

confidence: 99%

See 1 more Smart Citation

DISFRAC Version 2.0 Users Guide

Cochran¹,

Erickson²,

Williams³

et al. 2013

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Section: Dislocation Mechanicsmentioning

confidence: 99%

Section: Yokobori Dislocation Analysismentioning

confidence: 99%

DISFRAC Version 2.0 Users Guide

Cochran¹,

Erickson²,

Williams³

et al. 2013

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“…As the criterion, the energy and the local stress conditions [1][2][3] in this region or the hybrid theory which is taken account for both conditions [4] have been proposed. As the criterion, the energy and the local stress conditions [1][2][3] in this region or the hybrid theory which is taken account for both conditions [4] have been proposed.…”

Section: Introductionmentioning

confidence: 99%

The characterization of dominating region of fracture (process region) around a crack tip based on the concept of mechanical similarity and atomic mechanics

Yokobori

Nagumo

Yajima

et al. 2014

Strength, Fracture and Complexity

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On the basis of the analytical method using the concepts of super atoms, super dislocation and self similarity, the atomic distribution from super atoms to those with small scale was found to show the self similarity and the possibility of analyzing the behaviors of actual atoms using projection method was validated and the following results were obtained. The direct method and Verlet method were found to give the same results on the atomic distribution, however calculating time is different. Using our proposed method, the dominating regions of fracture were shown to be derived and they were in good agreement with those obtained experimentally by Ritchie et al. These analyses were found to predict quantitative values of process region or end region proposed by Kanninen and Broberg.

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“…These models have contributed to the advancement of stress shielding assessment. (Ratwani and Gupta, 1974) Parallel-Collinear cracks Coefficient of Interaction (Yokobori et al, 1979) Parallel cracks Asymptotic Approximation (Chang, 1982) …”

Section: Introductionmentioning

confidence: 99%

Validation of Crack Interaction Limit Model for Parallel Edge Cracks using Two-Dimensional Finite Element Analysis

Daud¹,

Ariffin²,

Abdullah³

2013

Int J Automot Mech Eng

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Shielding interaction effects of two parallel edge cracks in finite thickness plates subjected to remote tension load is analyzed using a developed finite element analysis program. In the present study, the crack interaction limit is evaluated based on the fitness of service (FFS) code, and focus is given to the weak crack interaction region as the crack interval exceeds the length of cracks (b > a). Crack interaction factors are evaluated based on stress intensity factors (SIFs) for Mode I SIFs using a displacement extrapolation technique. Parametric studies involved a wide range of crack-to-width (0.05 ≤ a/W ≤ 0.5) and crack interval ratios (b/a > 1). For validation, crack interaction factors are compared with single edge crack SIFs as a state of zero interaction. Within the considered range of parameters, the proposed numerical evaluation used to predict the crack interaction factor reduces the error of existing analytical solution from 1.92% to 0.97% at higher a/W. In reference to FFS codes, the small discrepancy in the prediction of the crack interaction factor validates the reliability of the numerical model to predict crack interaction limits under shielding interaction effects. In conclusion, the numerical model gave a successful prediction in estimating the crack interaction limit, which can be used as a reference for the shielding orientation of other cracks.

show abstract

Criterion for brittle fracture of notched or cracked specimens based on combined micro- and macro crack mechanics—II

Cited by 9 publications

References 7 publications

DISFRAC Version 2.0 Users Guide

DISFRAC Version 2.0 Users Guide

The characterization of dominating region of fracture (process region) around a crack tip based on the concept of mechanical similarity and atomic mechanics

Validation of Crack Interaction Limit Model for Parallel Edge Cracks using Two-Dimensional Finite Element Analysis

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