Search Results 1-19 of 19

1

Evaluation method of plastic stress singularity for V-shaped notch under various loading conditions [in Japanese]

INOUE Harutaka , YOSHIDA Yusuke , ODA Kazuhiro , TSUTSUMI Noriko

… The usefulness of the plastic stress intensity factor has been shown in the strength evaluation of the sharp notch under the large scale yield condition. … However, it is difficult to derive the singularity index of plastic stress field. … In this study, the plastic singularity index of V-shaped notch can be obtained by a simple analysis using the finite element method. …

The Proceedings of Conference of Kyushu Branch 2019.72(0), G23, 2019

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2

Experimental and Analytical Investigations of Fracture Toughness in Weldments of 6082 Al Alloy

Mosneaga V. A. , Mizutani Toru , Kobayashi Toshiro , Toda Hiroyuki

… observation of fracture toughness test, stress field at crack-tip is analyzed using elasto-plastic finite element method (Hereinafter, FEM.) assuming that a crack is near a boundary between a weld metal and heat affected zone (Hereinafter, HAZ.). … The microcracks are aligned ahead of the crack-tip at an angle of 60 degrees from an initial notch direction. …

MATERIALS TRANSACTIONS 42(11), 2386-2391, 2001

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3

Initial Fatigue Crack Growth Behavior in a Notched Component (Report V) : Assessment of Initial Defect in Respect to Fatigue Life of a Notched Component(Mechanics, Strength & Structural Design)

HORIKAWA Kohsuke , CHO Sang-moung

… The present report is intended to apply Elasto-Plastic Fracture Mechanics (EPFM) for assessment of initial defect and for fatigue design in welding steel structures. … Considering fatigue design methods of welding steel structures, assessment methods of initial defect in notch field were classified into three cases. …

Transactions of JWRI 17(2), 433-440, 1988-12
4

Effect of Welding Residual Stress on Initial Fatigue Crack Propagation in a Notch Field : Initial Fatigue Crack Growth Behavior in a Notched Component (4th Report) [in Japanese]

CHO Sang-moung , HORIKAWA Kohsuke

… The present report is intended to evaluate the effect of residual stress on initial fatigue crack propagation rate in a notch field. … Initial fatigue crack propagation rate in tensile residual stress field of center notched stip (S541) is affected by both of residual stress and elasto-plastic behavior. … In low cycle (high stress) region, the effect of elasto-plastic behavior is remarkable. …

quarterly journal of the Japan Welding Society 6(4), 98-104, 1988-11-05
5

Effect of Cyclic Yield Strength on Initial Fatigue Crack Propagation in a Notch Field : Initial Fatigue Crack Growth Behavior in a Notched Component (3rd Report) [in Japanese]

CHO Sang-moung , HORIKAWA Kohsuke

… The present report is intended to evaluate the difference of initial fatigue crack propagation rate between mild steel and high tensile strength steel in notch field subjected to high stress. … This characteristics might result from elasto-plastic effect on fatigue crack propagation. … By application of ΔJ calculated in this study, the asto-plastic effect could be evaluated. …

quarterly journal of the Japan Welding Society 6(4), 91-98, 1988-11-05
6

Elasto-Plastic Analysis Using Hybrid Stress Model [in Japanese]

伊良波繁雄 , Iraha Shigeo

… In this paper, a elastic-plastic analysis of Two-Dimensional structures based on hybrid stress model is presented. … When yielding occur in the element, The stress field satisfies the plastic condition in the element therfor the plastic condition equations is introduced into the principle of hybrid complementary energy using lagrange multipliers defined on the yielded checking point in the element. …

Bulletin of the Faculty of Engineering,University of the Ryukyus. (35), p35-48, 1988-03

IR
7

Initial fatigue crack growth behavior in a notched component. (4th Report). Effect of welding residual stress on initial fatigue crack propagation in a notch field.:Initial Fatigue Crack Growth Behavior in a Notched Component (4th Report) [in Japanese]

Cho Sang-moung , Horikawa Kohsuke

… The present report is intended to evaluate the effect of residual stress on initial fatigue crack propagation rate in a notch field. Initial fatigue crack propagation rate in tensile residual stress field of center notched stip (SS41) is affected by both of residual stress and elasto-plastic behavior. …

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 6(4), 550-556, 1988

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8

Initial fatigue crack growth behavior in a notched component. (3rd Report). Effect of cyclic yield strength on initial fatigue crack propagation in a notch field.:Initial Fatigue Crack Growth Behavior in a Notched Component (3rd Report) [in Japanese]

Cho Sang-moung , Horikawa Kohsuke

… The present report is intended to evaluate the difference of initial fatigue crack propagation rate between mild steel and high tensile strength steel in notch field subjected to high stress. Two used materials (SS41, HT80) have similar characteristics in long crack propagation (R=-1) when small scale yield condition is satisfied. … This characteristics might result from elasto-plastic effect on fatigue crack propagation. …

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 6(4), 543-550, 1988

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9

Initial Fatigue Crack Growth Behavior in a Notched Component (Report IV ) : Effect of Tensile Residual Stress(Mechanics, Strength & Structural Design)

HORIKAWA Kohsuke , CHO Sang-moung

… The present report was intended to evaluate the effect of tensile residual stress on initial fatigue crack propagation in a notch field. … Initial fatigue crack propagation rate in tensile residual stress field on center notched strip (SS41) is affected by both residual stress and elasto-plastic behavior. … In low cycle (high stress) region, the effect of elasto-plastic behavior was remarkable. …

Transactions of JWRI 16(2), 375-382, 1987-12
10

Initial Fatigue Crack Growth Behavior in a Notched Component (Report III) : Effect of Cyclic Yield Strength(Mechanics, Strength & Structural Design)

HORIKAWA Kohsuke , CHO Sang-moung

… The present report was intended to evaluate the difference of initial fatigue crack propagation rate between mild steel and high tensile strength steel in notch field subjected to high stress. … This characteristics might result from elasto-plastic effect on fatigue crack propagation. … By application of ΔJ calculated in this study, the elasto-plastic effect could be evaluated. …

Transactions of JWRI 16(2), 367-373, 1987-12
11

Evaluation of Fatigue Crack in a Notch Field by Elasto-Plastic Fracture Mechanics : Initial Fatigue Crack Growth Behavior in a Noched Component (2nd Report) [in Japanese]

CHO Sang-Moung , HORIKAWA Kohsuke

… In order to assess the growth rates of initial cracks in inelastic notch fields by cyclic loads, it is inevitable to apply elasto-plastic fracture mechanics. … In the present report, the evaluating method of ΔJ was developed for the initial fatigue cracks in the inelastic notch fields. … The interpolation function for calculation of J-integral by Willson was modified for application to the notch fields. …

quarterly journal of the Japan Welding Society 5(4), 114-120, 1987-11-05
12

Estimation of Elasto-Plastic Stress Distribution in a Notch Field : Initial Fatigue Crack Growth Behavior in a Notched Component (1st Report) [in Japanese]

CHO Sang-Moung , HORIKAWA Kohsuke

… The extension force of short cracks or initial defects existing in the inelastic field of notches can be evaluated by J-integral. … The solution of J-integral may be obtained by interpolation method using elasto-plastic stress. …

quarterly journal of the Japan Welding Society 5(4), 108-113, 1987-11-05
13

Initial Fatigue Crack Growth Behavior in a Notched Component (Report II) : Evaluation of Fatigue Crack in a Notch Field by Elasto-Plastic Fracture Mechanics(Mechanics, Strength & Structural Design)

Horikawa Kohsuke , Cho Sang-moung

Transactions of JWRI 16(1), 167-175, 1987-06

IR
14

Initial Fatigue Crack Growth Behavior in a Notched Component (Report I) : Estimation of Elasto-plastic Stress Distribution in a Notch Field(Mechanics, Strength & Structural Design)

Horikawa Kohsuke , Cho Sang-Moung

Transactions of JWRI 16(1), 159-166, 1987-06

IR
15

Initial Fatigue Crack Growth Behavior in a Notched Component (Report II) : Evaluation of Fatigue Crack in a Notch Field by Elasto-Plastic Fracture Mechanics(Mechanics, Strength & Structural Design)

HORIKAWA Kohsuke , CHO Sang-moung CHO

… In order to characterize the propagation rates of initial cracks in elasto-plastic notch fields by fatigue loads, it is inevitable to apply elasto-plastic fracture mechanics. … In the present report, the evaluating method of ΔJ was developed for initial fatigue cracks in elasto-plastic notch field. …

Transactions of JWRI 16(1), 167-175, 1987-06
16

Initial Fatigue Crack Growth Behavior in a Notched Component (Report I) : Estimation of Elasto-plastic Stress Distribution in a Notch Field(Mechanics, Strength & Structural Design)

HORIKAWA Kohsuke , CHO Sang-moung

… In order to evaluate J-integral by elastic analysis for the short cracks or initial defects existing in the elasto-plastic field of notches, it is needed to obtain elasto-plastic stress distribution in the notch field, when crack is not present, by elastic solutions. …

Transactions of JWRI 16(1), 159-166, 1987-06
17

Initial fatigue crack growth behavior in a noched component. (2nd report). Evaluation of fatigue crack in a notch field by elasto-plastic fracture mechanics.:Initial Fatigue Crack Growth Behavior in a Noched Component (2nd Report) [in Japanese]

Cho Sang-Moung , Horikawa Kohsuke

… In order to assess the growth rates of initial cracks in inelastic notch fields by cyclic loads, it is inevitable to apply clasto-plastic fracture mechanics. … In the present report, the evaluating method of ΔJ was developed for the initial fatigue cracks in the inelastic notch fields. … The interpolation function for calculation of J-integral by Willson was modified for application to the notch fields. …

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 5(4), 544-550, 1987

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18

Initial fatigue crack growth behavior in a notched component. (1st report). Estimation of elasto-plastic stress distribution in a notch field.:Initial Fatigue Crack Growth Behavior in a Notched Component (1st Report) [in Japanese]

Cho Sang-Moung , Horikawa Kohsuke

… The extension force of short cracks or initial defects existing in the inelastic field of notches can be evaluated by, J-integral. … The solution of J-integral may be obtained by interpolation method using elasto-plastic stress. …

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 5(4), 538-543, 1987

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19

Elasto-plastic analysis near the notch introduced to the alumina ceramic green sheet. [in Japanese]

OHARA Hideharu , YOKOBORI Toshimitsu , NOJIRI Keiichi , NAITOH Shinji

グリーンシート状態にて, アルミナセラミックスIC基板寸法に導入された切欠き先端近傍の弾塑性応力解析を行った. その結果, 材料定数H/E (H: 加工硬化係数, E: ヤング率) が小さいと, 切欠き延長方向の弾塑性境界に顕著な引っ張り・圧縮2軸 …

Journal of the Ceramic Association, Japan 93(1074), 81-88, 1985

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