研究者詳細 - 黒島　義人

論文 - 黒島　義人

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Relieving of welding residual stress by applying cyclic load 査読有り

Harada S., Kobayashi Y., Kuroshima Y., Iwamoto K., Amimoto T.

Key Engineering Materials 243-244 183 - 188 2003年06月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

A fundamental study of relieving or attenuating weld residual stress was done by applying cyclic load. Two kinds of tests were done. First, bead-on welding was done onto front surface of plate specimen. Then, the distribution of initial welding residual stress was measured in terms of X ray diffraction method. To relieve this initial residual stress, cyclic load was applied to the specimen in a vibrating machine. The change of stress cycle-dependent residual stress was measured. Secondary, this method was applied to a box-shaped rahmen structure. Both results showed that the initial welding residual stress can be relieved when the summation of stress component of the residual stress plus externally applied cyclic stress exceeds the yield stress of the material.

Scopus

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LMCによるCuクラスタリング過程の定量的評価査読有り

福田忠生,赤星保浩,黒島義人,原田昭治

日本機械学会論文集(A編) 69 ( 679 ) 538 - 538 2003年04月

Characterization of Growth Behavior of Small Mode III Crack Using Compliance Method in Torsional Fatigue 査読有り

Yoshihito Kuroshima,Shoji Harada,Ryohei Miyoshi

ATEM'03 2003年04月

LMCによるCuクラスタリング過程の定量的評価査読有り

福田忠生, 赤星保浩, 黒島義人, 原田昭治

日本機械学会論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A ( 社団法人日本機械学会 ) 69 ( 679 ) 538 - 544 2003年03月

担当区分：責任著者記述言語：日本語掲載種別：研究論文（学術雑誌）

In this study, we simulate nanoscale copper precipitation process based on the vacancy jump model using Lattice Monte Carlo (LMC) method, where an activation energy is calculated from the first neighboring interaction model. We confirmed that status of copper clustering at temperature of 300 K is different from those of 600 K and 900 K at the same potential energy decrease, and copper clusters are formed more rapidly at higher temperature. We obtained a fact that process of copper clustering consists of the two phases which are formation phase, and coalescence and/or absorption phase.

DOI： 10.1299/kikaia.69.538

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/110002370340

Quantitative evaluation of copper clustering process by Lattice Monte Carlo simulation 査読有り

Fukuta T., Akahoshi Y., Kuroshima Y., Harada S.

Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A 69 ( 3 ) 538 - 544 2003年03月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0038617770&origin=inward

OS12W0360 Characterization of growth behavior of small mode III crack using compliance method in torsional fatigue 査読有り

Kuroshima Yoshihito, Harada Shoji, Miyoshi Rhohei

Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics ( 一般社団法人日本機械学会 ) 2003 ( 0 ) _OS12W0360 - _OS12W0360 2003年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

In order to characterize small mode III crack growth torsional fatigue tests were done using circumferentially notched prefatigue-cracked specimens. The change of the shape of hysteresis loop during crack growth was monitored in terms of two wire strain gauges mounted on the surface perpendicularly across the notch. Then, the change of compliance during fatigue crack growth was evaluated in terms of the hysteresis loop. Regarding to characteristic growth behavior of the small mode III fatigue crack, the small crack first grew in the coaxial plane. Then it gradually changed growth plane out of that coaxial plane. Finally the crack was propagated in the direction 45° inclined to the cross sectional plane. That means, the change of three dimensional crack plane was found to correspond to so-called factory roof pattern, common at the first stage of fatigue crack growth from the notch root in torsional fatigue condition. The fatigue crack growth rate varied in accordance with that mode change of small crack growth. In addition, the crack growth rate was considerably affected by the friction force acting on the crack surface. Increasing crack length in mode III crack growth condition decelerated the crack growth, which reflected increase in friction force. The change of compliance during crack growth was found suitable for estimating the effect of the friction force on crack growth rate. In lower ΔKeff region, the friction force was successfully characterized using a parameter of compliance. In case of large scale yielding condition, ΔJeff parameter including the effect of friction force-generated increase of torque was found to be a suitable parameter to estimate crack growth rate. The friction force acting on the unit area of crack plane was constant, irrespective of crack length and loading condition.

DOI： 10.1299/jsmeatem.2003.2._OS12W0360

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/110009968302

Reliving of Welding Residual Stress by Applying Cyclic Load 査読有り

S. HARADA,Y. KOBAYASHI,Y. KUROSHIMA,K. IWAMOTO,T. AMIMOTO

Proceedings of the International Conference on Experimental and Computational Mechanics in Engineering 2002年08月

Cuクラスタリング過程のLMCシミュレーション

福田忠生, 赤星保浩, 黒島義人, 原田昭治

九州工業大学研究報告工学 ( 九州工業大学工学部 ) ( 74 ) 1 - 8 2002年03月

Mode III fatigue crack growth behavior - Transition condition of the crack growth mode - 査読有り

Kobayashi Y., Harada S., Kuroshima Y., Fukuda Y., Miyoshi R.

Zairyo/Journal of the Society of Materials Science, Japan ( 社団法人日本材料学会 ) 50 ( 10 ) 1098 - 1101 2001年10月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Mode III fatigue crack is usually observed at the root of circumferentially notched round bar. As the crack grows in the depth direction of specimen, the growth rate of crack decreases. In this respect, crack mode transition from mode III to mode I is understood responsible. However, quantitative evaluation on crack mode transition has been hardly done. Therefore, values of stress intensity factor K1 under mode III fatigue crack growth tests on a low carbon steel were calculated with using principal stress, as crack mode transition began. Then KI values were compared with crack growth rate curve of mode I. As the result, it was observed that the condition of crack mode transition was given by the crack growth curve of mode I.

DOI： 10.2472/jsms.50.1098

Scopus

CiNii Article

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0035484383&origin=inward

A Mechanics Condition Governing Incipient Fatigue Crack Growth under Cyclic Torsion 査読有り

S. Harada,Y.Kobayashi,Y. Kuroshima

6th International Conference on Biaxial/Multiaxial Fatigue & Fracture 639 - 646 2001年06月

ModeⅢ疲労き裂の進展挙動 -モード遷移条件- 査読有り

未入力

材料 50 ( 10 ) 1098 - 1098 2001年04月

Mechanism of High Strengh Steel in Giga Cycle Fatingne Region 査読有り

未入力

Fatigue in the Very High Cycle Regime 229 - 229 2001年04月

Fatigue Life Evaluation of High Strength Steel Based on the Interior Small Crack Observation 査読有り

未入力

Material Science Research International, STP-1 53 - 53 2001年04月

The effect of atmosphere on fatigue properties of high strength steel 査読有り

Shoya S., Kuroshima Y., Harada S.

Zairyo/Journal of the Society of Materials Science, Japan ( 社団法人日本材料学会 ) 48 ( 10 ) 1107 - 1111 1999年10月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

In order to examine the mechanism of so-called fish eye-pattern fatigue failure, usually being caused by initiation and growth of internal small crack, uniaxial push-pull fatigue tests were carried out on a high strength low alloy steel in vacuum, for modifying the environment during internal crack initiation and growth on specimen surface. The test results showed that the fatigue life was elongated and the crack growth rate was delayed in vacuum. Furthermore, the results of fractographic observation of crack initiation at inclusions revealed that the surface type crack initiation in vacuum resembles the internal fish eye-type crack initiation in atmosphere. Finally the fish eye-type fatigue life was well evaluated in terms of small crack growth law in vacuum.

DOI： 10.2472/jsms.48.1107

Scopus

CiNii Article

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0033207753&origin=inward

耐摩耗性表面処理球状黒鉛鋳鉄の開発とエロージョン摩耗特性査読有り

未入力

日本機械学会論文集(A編) 65 ( 635 ) 1528 - 1528 1999年04月

高強度鋼の疲労寿命特性に及ぼす大気の影響査読有り

黒島　義人

材料 48 ( 10 ) 1107 - 1107 1999年04月

温度変化に注目したCFRTPの疲労寿命評価査読有り

未入力