Determination of Highly Accurate Values of Stress Intensity Factor or Stress Concentration Factor of Plate Specimen by FEM.

Nisitani, Hironobu; Kawamura, Takashi; Fujisaki, Wataru; Fukuda, Takayuki

doi:10.1299/kikaia.65.26

Cited by 18 publications

(13 citation statements)

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“…The FEM mesh pattern near the crack tip is made fine systematically. The stress intensity factor of the edge crack is analyzed by the crack tip stress method [14,15]. The crack tip stress method is a highly accurate method to calculate the stress intensity factor of a crack problem using the finite element method, and has been proposed by Nisitani [14,15].…”

Section: Methods Of Analysismentioning

confidence: 99%

“…The stress intensity factor of the edge crack is analyzed by the crack tip stress method [14,15]. The crack tip stress method is a highly accurate method to calculate the stress intensity factor of a crack problem using the finite element method, and has been proposed by Nisitani [14,15]. According to the principle of the crack tip stress method, the ratio of the stress intensity factors of the two strips with a crack subjected to tension is nearly equal to the ratio of the y-directional stresses at the crack tips obtained by FEM.…”

Section: Methods Of Analysismentioning

confidence: 99%

“…According to the principle of the crack tip stress method, the ratio of the stress intensity factors of the two strips with a crack subjected to tension is nearly equal to the ratio of the y-directional stresses at the crack tips obtained by FEM. This is the reason why the singular stress fields are represented by the crack tip stress y0,FEM under the condition of the same mesh pattern [14,15]. Based on the above fact, equation (1) is obtained.…”

Section: Methods Of Analysismentioning

confidence: 99%

See 2 more Smart Citations

Stress intensity factor for small edge crack in interfacial singularity region

Oda

Kawakita

Tsutsumi

2017

J. Phys.: Conf. Ser.

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Section: Methods Of Analysismentioning

confidence: 99%

Section: Methods Of Analysismentioning

confidence: 99%

Section: Methods Of Analysismentioning

confidence: 99%

See 1 more Smart Citation

Stress intensity factor for small edge crack in interfacial singularity region

Oda

Kawakita

Tsutsumi

2017

J. Phys.: Conf. Ser.

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“…The original crack tip stress method proposed by Nisitani et al (1999) cannot be used directly into solving the interface crack problems since oscillatory singularity is observed along the interface. Then, Oda et al (2009) extended this method to the interface crack problems by creating the same singularities for the reference and target unknown problems.…”

Section: Analysis Methods 21 Formulation For the Interface Crack Problemsmentioning

confidence: 99%

“…In this research, the improved crack tip stress method proposed by Oda et al (2009), which is based on the concept of crack tip stress method introduced by Nisitani et al (1999), will be used to solve the SIFs of the dissimilar bonded plates subjected to bending loading conditions and a post-processing technique of linear extrapolation will be proposed to improve the computational accuracy. The new technique reduces the computational cost significantly since very refined meshes around the crack tip are no longer necessary.…”

Section: Introductionmentioning

confidence: 99%

Effect of arbitrary bi‐material combination and bending loading conditions on stress intensity factors of an edge interface crack

Oda

Lan

Noda

et al. 2012

International Journal of Structural Integrity

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Purpose -The purpose of this paper is to compute the stress intensity factors (SIFs) of single edge interface crack for arbitrary material combinations and various relative crack lengths, and compare with those for the bonded plates subjected to tensile loading conditions. It aims to discuss the results of the shallow edge interface crack on the basis of the singular stress near the free-edge corner without the crack. Design/methodology/approach -In this study, the SIFs of interface crack in dissimilar bonded plates subjected to bending loading conditions are analyzed by the finite element method and a post-processing technique. The use of post-processing technique of extrapolation reduces the computational cost and improves the accuracy of the obtained result. Findings -The empirical expressions are proposed for evaluating the SIFs of arbitrary material combinations. Originality/value -Empirical functions can be used to obtain the SIFs for arbitrary material combinations for the bending loading conditions easily. It is very convenient for engineering application.

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Analysis method useful for calculating various interface stress intensity factors efficiently by using a proportional stress field of a single reference solution modeling

Oda,

Ashikari,

Noda

2024

Arch Appl Mech

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This paper has proposed an efficient analysis method to calculate interface stress intensity factors (SIFs) based on a proportional stress field of a reference problem whose exact solution is available. In the previous proportional methods, the same crack length and the same element size were applied to both reference and unknown problems so that the same FEM error can be produced. Therefore, when analyzing many unknown problems, the conventional method needs to analyze many reference problems at the same time. Since this approach is time-consuming, this paper considers how to calculate many crack lengths efficiently by using only one single reference solution modeling. For this purpose, several general relations of SIFs are derived for the unknown and the reference problems when both crack length and element size are different. To analyze many unknown problems accurately by using a single reference solution modeling, how to choose the most suitable element dimension of the reference model is clarified. The proposed method is especially useful for crack propagation analysis.

show abstract

Determination of Highly Accurate Values of Stress Intensity Factor or Stress Concentration Factor of Plate Specimen by FEM.

Cited by 18 publications

References 0 publications

Stress intensity factor for small edge crack in interfacial singularity region

Stress intensity factor for small edge crack in interfacial singularity region

Effect of arbitrary bi‐material combination and bending loading conditions on stress intensity factors of an edge interface crack

Analysis method useful for calculating various interface stress intensity factors efficiently by using a proportional stress field of a single reference solution modeling

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