SEARCH
Search Details
NOMURA MasatakaGraduate School of Maritime Sciences / Department of Maritime SciencesAssociate Professor
Research activity information
■ Paper- Jun. 2017, 日本機械学会論文集, 83(851) (851), Japaneseチタン材料の接触熱抵抗の測定とボルト締結体への応用[Refereed]Scientific journal
- Rigid flanged shaft couplings are commonly used to connect two shafts that transmit large torque. A pair of flanges is clamped by multiple reamer bolts since they are subjected to large shear force. In JIS B 1451, it is assumed that the shaft torque delivered to shaft couplings is transmitted only through the cylindrical surface of reamer bolt as shear forces, although it is also supported by the friction force on the contact surfaces. In the previous paper, Shear Force Transfer Ratio (SFTR) is defined in order to evaluate the ratio of the shear forces supported by the reamer surface and the action of friction. Then, the distributions of SFTR and the bending stresses along the reamer surface are analyzed by three-dimensional FEM, focusing on the effect of the fit between the cylindrical surface of reamer bolt and the bolt hole. In the actual rigid flanged shaft couplings, it is predicted that the scatter of initial bolt stress among multiple bolts and the misalignment between the two shafts significantly affect the SFTR and the bending stresses to be produced. Commonly observed misalignments are parallel misalignment or offset, axial misalignment or endplay, and angular misalignment. In this study, the effects of the scatter of initial bolt stress and the misalignments listed above are analyzed by three-dimensional FEM, in which an engaged thread portion with complex geometry is replaced by a simple cylinder. By conducting parametric calculations, it is concluded that the bolt force scatter has a minor effect under the commonly encountered tightening conditions, and the angular misalignment specifically affects the load capacity and the bending stresses generated in reamer bolts. It is also found that unlike the other types of misalignments, a harmful influence of angular misalignment cannot be mitigated even if the initial bolt stress is increased.Japan Society of Mechanical Engineers, Oct. 2014, Transactions of the JSME, 80(818) (818), 1 - 14, Japanese[Refereed]Scientific journal
- ASME, Jul. 2014, ASME PVP2014 Proceedings, CD - ROM, EnglishExperimental Verification of Finite Element Approach for Designing Robust Bolted Joints Using Titanium and Titanium Alloy Bolts at Elevated Temperature[Refereed]Scientific journal
- ASME, Jul. 2014, ASME PVP2014 Proceedings, CD - ROM, EnglishEvaluation of Specific Mechanical Behavior of Fine Screw Threads by Finite Element Analysis and Experiments[Refereed]Scientific journal
- ASME, Jul. 2013, ASME PVP2013 Proceedings, EnglishEvaluation of Thermal and Mechanical Behaviors of Bolted Joints made of Titanium and Titanium Alloy and Its Application to Robust Joint Design[Refereed]International conference proceedings
- ASME, Jul. 2013, ASME PVP2013 Proceedings, EnglishA New Experimental Approach for Measuring Friction Coefficients of Threaded Fasteners Focusing on the Repetition of Tightening Operation and Surface Roughness[Refereed]International conference proceedings
- ASME, Apr. 2013, TRANS, ASME, Pressure Vessel and Piping Technology, 135, EnglishEvaluation of Thermal Contact Resistance at the Interface of Dissimilar Materials[Refereed]Scientific journal
- 日本機械学会, Mar. 2013, 日本機械学会論文集(A 編), 79(799) (799), 313 - 325, JapaneseAnalyses of Tightening Characteristics and Cyclic Stress Amplitude of Studs and Tap Bolts[Refereed]Scientific journal
- 日本機械学会, Aug. 2012, 日本機械学会論文集(C編), 78(792) (792), 3073 - 3084, JapaneseBolt Preload Reduction of Pipe Flange Connections after Plant Shutdown[Refereed]Scientific journal
- ASME 2012,Pressure Vessels and Piping Conference, Jul. 2012, Design and Analysis of Bolted Joints, EnglishBolt Preload Reduction of Pipe Flange Connections after Plant Shutdown[Refereed]International conference proceedings
- ASME, Apr. 2012, TRANS, ASME, Pressure Vessel and Piping Technology, 134, EnglishAnalysis of Thermal and Mechanical Behavior of Pipe Flange Connections by Taking Account of Gasket Compression Characteristics at Elevated Temperature[Refereed]Scientific journal
- ASME, Dec. 2011, Trans. ASME, Journal of Pressure Vessel Technology, 133, EnglishFinite Element Analysis of the Cyclic Stress Amplitude of Threaded Fasteners Using Helical Thread Models[Refereed]Scientific journal
- Tire coming-off accidents from large vehicles are primarily caused by the fatigue failure of wheel bolts, by which the tire wheels are clamped to the hubs of the shaft. In the previous study, stress amplitudes occurred in wheel bolts were measured using a full-scale test equipment, which was constructed utilizing an actual trailer. In the experiments, the thread ridges of the wheel bolts were partly removed and the portion was machined into cylindrical shape in order to attach strain gauges. To examine the fatigue mechanism in more detail, it is necessary to evaluate the stress amplitudes at thread root, where the fatigue failures of threaded fasteners usually occur. In this study, the stress amplitudes at thread root are analyzed using three-dimensional FEM. Threaded portions are modeled using fine meshes to evaluate the stress amplitudes generated in both wheel bolts and inner nuts with sufficient accuracy. The magnitudes of the live loads, which exert alternating external forces on the wheel bolted joints, are varied so as to cover from the normal condition to the over-loaded ones. It has been found that the maximum stress amplitudes at the threat root significantly increase when the initial clamping force decreases as low as 30% of the prescribed value, which is also exaggerated with larger friction coefficient at contact surfaces around wheel bolted joints. The validity of the numerical analysis is confirmed by comparing the numerical results of the stress amplitudes on the wheel bolt surface with those by experiments.日本機械学会, Oct. 2011, 日本機械学会論文集(C編), 77(782) (782), 3840 - 3849, Japanese[Refereed]Scientific journal
- ASME 2011,Pressure Vessels and Piping Conference, Jul. 2011, Design and Analysis of Bolted Joints, EnglishEvaluation of Tightening Process of Reamer Bolts by Cooled Fitting[Refereed]International conference proceedings
- ASME 2011,Pressure Vessels and Piping Conference, Jul. 2011, Design and Analysis of Bolted Joints, EnglishAnalysis of the Tightening Process and the Cyclic Stress Amplitude of Studs and Tap Bolts[Refereed]International conference proceedings
- ASME 2010,Pressure Vessels and Piping Conference, Jul. 2010, Design and Analysis of Bolted Joints, EnglishFinite Element Analysis of the Mechanical Behavior of Multi-bolted Joints Subjected to Shear Loads[Refereed]International conference proceedings
- ASME 2010,Pressure Vessels and Piping Conference, Jul. 2010, Design and Analysis of Bolted Joints, EnglishEvaluation of Thermal Contact Resistance at the Interface Composed of Dissimilar Materials[Refereed]International conference proceedings
- 2010, 日本機械学会論文集(A編, Vol. 76, No. 763, pp. 344-350, Japanese異材界面における接触熱抵抗の評価[Refereed]Scientific journal
- 2010, 日本機械学会論文集(C編), Vol. 76, No. 730, pp. 30, Japaneseトルク制御機能付き大型車用ホイール多軸同時締め付け装置の開発[Refereed]Scientific journal
- 2010, 日本機械学会論文集(A編, Vol. 76, No. 730, pp. 30, Japaneseせん断荷重を受ける多数ボルト締結体の力学特性の評価[Refereed]Scientific journal
- Japan Society of Mechanical Engineers, 2010, Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, 76(772) (772), 3768 - 3775, Japanese[Refereed]International conference proceedings
- Dec. 2009, J. Pressure Vessel Technology, Vol. 131, Issue 6, EnglishAnalysis of Heat Flow Around Bolted Joints and Variations of Axial Bolt Force[Refereed]Scientific journal
- Jul. 2009, 2009 ASME Pressure Vessels and Piping Conference, PVP2009-77340, EnglishFinite Element Analysis of the Fatigue Strength of Threaded Fasteners Using Helical Thread Models[Refereed]Scientific journal
- Jul. 2009, 2009 ASME Pressure Vessels and Piping Conference, PVP2009-77596, EnglishAnalysis of the Mechanical Behavior of Pipe Flange Connections by Taking Account of Gasket Compression Characteristics at Elevated Temperature[Refereed]Scientific journal
- Feb. 2009, 日本機械学会論文集(C編), Vol. 75, No. 750, pp. 446-453, Japanese有限要素解析による大型車用ホイールボルトの締め付け特性の評価[Refereed]Scientific journal
- 2009, 日本機械学会論文集(A編), Vol. 75, No. 759, pp. 1577-158, Japanese大型車用ホイールボルトの軸力のばらつきと安全性の評価[Refereed]Scientific journal
- 2009, 日本機械学会論文集(A編), Vol. 75, No. 759, pp. 1570-157, Japaneseねじ山らせんモデルによるボルト締結体の疲労強度評価[Refereed]Scientific journal
- 2009, 日本機械学会論文集(C編), Vol. 75, No. 759, pp. 3069-307, Japaneseガスケットの高温圧縮特性を考慮した管フランジ締結体の有限要素解析[Refereed]Scientific journal
- 2009, J. Pressure Vessel Technology, Vol. 131, Issue 2, EnglishTrue Cross Sectional Area of Screw Threads With Helix and Root Radius Geometries Taken Into Consideration[Refereed]Scientific journal
- 2009, Journal of Engvironment and Engineering, JSME, Vol. 4, No. 1, pp. 101-111, EnglishExperimental Investigation and Finite Element Analysis of the Free Vibration Problem of Bolted Joint by taking Account of Interface Stiffness[Refereed]Scientific journal
- Dec. 2008, Journal of Computational Science and Technology, JSME, Vol. 2, No. 4, pp. 578-586, EnglishIdentification of the Foundation Stiffness of Large Structure as an Inverse Problem[Refereed]Scientific journal
- Sep. 2008, 日本機械学会論文集(A編), Vol. 74, No. 745, pp. 1212-121, Japanese数値解析によるリーマボルトの負荷性能と強度の評価[Refereed]Scientific journal
- Aug. 2008, 日本マリンエンジニアリング学会誌, Vol. 43, No. 5, pp. 773-779, Japanese冷やしばめによるリーマボルトの締め付け過程の評価[Refereed]Scientific journal
- Jul. 2008, 日本マリンエンジニアリング学会誌, Vol. 43, No. 4, pp. 591-597, Japanese電磁加振法によるボルト軸力測定の適用性評価[Refereed]Scientific journal
- Jul. 2008, Proceedings of PVP2008, EnglishEvaluation of Strength and Load Capacity of Reamer Bolts by Numerical Analysis[Refereed]Scientific journal
- Apr. 2008, 日本機械学会論文集(A編), Vol 74, No. 740, pp. 484-490, Japanese逆問題的手法による大型構造物の基礎の剛性評価[Refereed]Scientific journal
- Mar. 2008, 日本マリンエンジニアリング学会誌, Vol. 43, No. 2, pp. 241-244, Japanese“コンカレントマリンエンジニアリング”による高付加価値機関室の設計Scientific journal
- Mar. 2008, 日本機械学会論文集(A編), Vol 74, No. 739, pp. 393-405, Japaneseボルト締結体まわりの熱流れと軸力変化の解析[Refereed]Scientific journal
- Feb. 2008, JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME, Vol. 130, Issue 1, EnglishProposition of helical thread modeling with accurate geometry and finite element analysis[Refereed]Scientific journal
- 2008, 圧力技術, Vo. 46, No. 6, pp. 363-369, Japanese高温環境下におけるシートガスケット圧縮試験装置の開発[Refereed]Scientific journal
- Oct. 2007, Transactions of The Japan Society of Mechanical Engineers, 73・734・2820-2827, JapaneseExperimental Investigation and Finite Element Analysis of the Free Vibration Problem of Bolted Joint by Taking Account of Interface Stiffness[Refereed]Scientific journal
- Jul. 2007, 2007 ASME Pressure Vessels and Piping Division Conference, Proceedings of PVP2007, EnglishDevelopment of Test Equipment for Measuring Compression Characteristics of Sheet Gaskets at Elevated Temperature[Refereed]Scientific journal
- Jul. 2007, 2007 ASME Pressure Vessels and Piping Division Conference, Proceedings of PVP2007, EnglishAnalysis of Heat Flow Around Bolted Joints and Variations of Axial Bolt Force[Refereed]Scientific journal
- Nov. 2006, 日本機械学会論文集(A編), Vol. 72, No. 723, pp. 1639-164, Japaneseねじ山らせん形状の高精度なモデリングと有限要素解析[Refereed]Scientific journal
- Jul. 2006, Proceedings of PVP2006-ICPVT-11, Proceedings of PVP2006-ICPVT-1, EnglishProposition of Helical Thread Modeling with Accurate Geometry and Finite Element Analysis[Refereed]International conference proceedings
- Analytical Expression of True Cross Sectional Area of Screw Thread with the Effects of Root Radius Taken into ConsiderationThe cross sectional area of threaded fastener has a complicated configuration due to the helix that characterizes its essential function of tightening structural members. When estimating the strength of threaded fasteners under external loads, the use of "stress area" is recommended in JIS B 0251. It is desired, however, to establish a procedure to calculate the true cross sectional area of screw thread by taking account of the effects of root radius in order to elucidate the various mechanical behaviors of bolted joints. In this paper, an analytical expression is presented to calculate the true cross sectional area with simple algebraic equations. Then, its "equivalent diameter" is denned and compared to effective diameter corresponding to the stress area defined in JIS B 0251.The Japan Society of Mechanical Engineers, Feb. 2006, Transactions of the Japan Society of Mechanical Engineers, 第72巻・714号C編・pp644-648(714) (714), 644 - 648, Japanese[Refereed]Scientific journal
- Feb. 2005, 日本機械学会論文集(C編), 71巻 702号(2005-2), JapaneseStudy on Tool Wear Mechanism of CFRP Cutting II[Refereed]Scientific journal
- Feb. 2005, 日本機械学会論文集(C編), Vol. 71, No. 702, pp. 719-724, JapaneseCFRP切削における工具摩耗機構II[Refereed]Scientific journal
- 日本機械学会 関西支部第85期定時総会講演会, Mar. 2010, Japanese, 日本機械学会, 神戸市(神戸大学), Domestic conference有限要素解析による大型車用ホイールボルトの疲労強度評価Oral presentation
- 日本機械学会 関西支部第85期定時総会講演会, Mar. 2010, Japanese, 日本機械学会, 神戸市(神戸大学), Domestic conference有限要素解析による軸継手用リーマボルトの力学特性の評価Oral presentation
- 日本機械学会 関西支部第85期定時総会講演会, Mar. 2010, Japanese, 日本機械学会, 神戸市(神戸大学), Domestic conference有限要素解析による外力を受けるボルト締結体の疲労強度評価Oral presentation
- 日本機械学会 関西支部第85期定時総会講演会, Mar. 2010, Japanese, 日本機械学会, 神戸市(神戸大学), Domestic conference熱負荷を受ける管フランジ締結体の三次元有限要素解析Oral presentation
- 日本機械学会 平成21年度関西学生会学生員卒業研究発表講演会, Mar. 2010, Japanese, 日本機械学会, 神戸市(神戸大学), Domestic conference大型車用ホイールボルトの疲労強度評価Oral presentation
- 日本機械学会 関西支部第85期定時総会講演会, Mar. 2010, Japanese, 日本機械学会, 神戸市(神戸大学), Domestic conference実機転用試験装置による大型車用ホイールボルトの疲労強度評価Oral presentation
- 日本機械学会 関西支部第85期定時総会講演会, Mar. 2010, Japanese, 日本機械学会, 神戸市(神戸大学), Domestic conference逆問題的手法による構造物の接触面剛性の評価Oral presentation
- 日本機械学会 平成21年度関西学生会学生員卒業研究発表講演会, Mar. 2010, Japanese, 日本機械学会, 神戸市(神戸大学), Domestic conference異種材料で構成されたボルト締結体の熱挙動の有限要素解析Oral presentation
- 日本機械学会 関西支部第85期定時総会講演会, Mar. 2010, Japanese, 日本機械学会, 神戸市(神戸大学), Domestic conferenceチタン・チタン合金の接触熱抵抗とボルト締結体への応用Oral presentation
- 日本機械学会 関西支部第85期定時総会講演会, Mar. 2010, Japanese, 日本機械学会, 神戸市(神戸大学), Domestic conferenceせん断荷重を受ける多数ボルト締結体の力学特性に関する研究Oral presentation
- ASME 2009 Pressure Vessels and Piping Conference, Jul. 2009, English, ASME, Prague, Czech Republic, International conferenceExperimental Investigation and Finite Element Analysis of the Free Vibration Problem of Bolted Joint by taking Account of Interface StiffnessOral presentation
- ASME 2009 Pressure Vessels and Piping Conference, Jul. 2009, English, ASME, Prague, Czech Republic, International conferenceAnalysis of the Mechanical Behavior of Pipe Flange Connections by Taking Account of Gasket Compression Characteristics at Elevated TemperatureOral presentation
- 日本機械学会 関西支部第84期定時総会講演会, Mar. 2009, Japanese, 日本機械学会, 東大阪市(近畿大学本部キャンパス), Domestic conference大型車用ホイールボルトの疲労強度評価Oral presentation
- 日本機械学会 平成20年度関西学生会学生員卒業研究発表講演会, Mar. 2009, Japanese, 日本機械学会, 東大阪市(近畿大学本部キャンパス), Domestic conference大型車用ホイールボルトの締め付けにおける弾性相互作用の測定Oral presentation
- 日本機械学会 関西支部第84期定時総会講演会, Mar. 2009, Japanese, 日本機械学会, 東大阪市(近畿大学本部キャンパス), Domestic conference実機試験による大型車用ホイールボルトのトルク-軸力関係の評価Oral presentation
- 日本機械学会 関西支部第84期定時総会講演会, Mar. 2009, Japanese, 日本機械学会, 東大阪市(近畿大学本部キャンパス), Domestic conference高温ガスケット圧縮特性を考慮した管フランジの力学特性解析Oral presentation
- 日本機械学会 平成20年度関西学生会学生員卒業研究発表講演会, Mar. 2009, Japanese, 日本機械学会, 東大阪市(近畿大学本部キャンパス), Domestic conference肩付きスタッドの力学特性評価Oral presentation
- 日本機械学会 平成20年度関西学生会学生員卒業研究発表講演会, Mar. 2009, Japanese, 日本機械学会, 東大阪市(近畿大学本部キャンパス), Domestic conference界面の剛性を考慮した固有振動解析についてOral presentation
- 日本機械学会 関西支部第84期定時総会講演会, Mar. 2009, Japanese, 日本機械学会, 東大阪市(近畿大学本部キャンパス), Domestic conference異材界面における接触熱抵抗の測定と評価Oral presentation
- 日本機械学会 平成20年度関西学生会学生員卒業研究発表講演会, Mar. 2009, Japanese, 日本機械学会, 東大阪市(近畿大学本部キャンパス), Domestic conferenceエアレンチによるボルト締め付けの特性評価Oral presentation
- 日本機械学会M&M2008材料力学カンファレンス, Sep. 2008, Japanese, 日本機械学会, 草津市(立命館大学びわこ・くさつキャンパス), Domestic conference大気中環境における異材界面の接触熱抵抗の評価Oral presentation
- 日本機械学会M&M2008材料力学カンファレンス, Sep. 2008, Japanese, 日本機械学会, 草津市(立命館大学びわこ・くさつキャンパス), Domestic conference実機試験による大型車用ホイールボルトのトルク-軸力関係の評価Oral presentation
- ASME 2008 Pressure Vessels and Piping Division Conference, Jul. 2008, English, ASME, Chicago, Illinois, International conferenceEvaluation of Strength and Load Capacity of Reamer Bolts by Numerical AnalysisOral presentation
- 日本機械学会 関西支部第83期定時総会講演会, Mar. 2008, Japanese, 日本機械学会, 豊中市(大阪大学豊中キャンパス), International conference大型車用ホイールボルトの締め付け特性の評価Oral presentation
- 日本機械学会 関西支部第83期定時総会講演会, Mar. 2008, Japanese, 日本機械学会, 豊中市(大阪大学豊中キャンパス), Domestic conference数値解析による多数ボルト締結体の力学特性の評価Oral presentation
- 日本機械学会 関西支部第83期定時総会講演会, Mar. 2008, Japanese, 日本機械学会, 豊中市(大阪大学豊中キャンパス), Domestic conference数値解析によるリーマボルトの強度と負荷性能に関する研究Oral presentation
- 日本機械学会 関西支部第83期定時総会講演会, Mar. 2008, Japanese, 日本機械学会, 豊中市(大阪大学豊中キャンパス), International conferenceLNG船用超高圧給水ポンプの熱挙動と強度評価Oral presentation
- 第77回(平成19年秋季)マリンエンジニアリング学術講演会, Oct. 2007, Japanese, 日本マリンエンジニアリング学会, 神戸市(神戸大学), Domestic conference冷やしばめによるリーマボルトの締め付け特性の評価Oral presentation
- 第77回(平成19年秋季)マリンエンジニアリング学術講演会, Oct. 2007, Japanese, 日本マリンエンジニアリング学会, 神戸市(神戸大学), Domestic conference三次元FEMによるリーマボルトの締め付け特性の評価Oral presentation
- 山梨講演会2007, Oct. 2007, Japanese, 日本機械学会, 甲府市(山梨大学), Domestic conference高温環境下におけるシートガスケット圧縮試験装置の開発Oral presentation
- ASME 2007 Pressure Vessels and Piping Division Conference, Jul. 2007, English, ASME, San Antonio, Texas, International conferenceDevelopment of Test Equipment for Measuring Compression Characteristics of Sheet Gaskets at Elevated TemperatureOral presentation
- ASME 2007 Pressure Vessels and Piping Division Conference, Jul. 2007, English, ASME, San Antonio, Texas, International conferenceAnalysis of Heat Flow Around Bolted Joints and Variations of Axial Bolt ForceOral presentation
- 日本機械学会2006年度年次大会, Sep. 2006, Japanese, 日本機械学会, 熊本市(熊本大学), Domestic conferenceボルト締結体まわりの熱流れと軸力変化の解析Oral presentation
- 日本機械学会2006年度年次大会, Sep. 2006, Japanese, 日本機械学会, 熊本大学, Domestic conferenceAnalysis of Heat Flow around Bolted Joints and Variations of Axial Bolt ForceOral presentation
- ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference, Jul. 2006, English, ASME, Vancouver, BC, Canada, International conferenceProposition of Helical Thread Modeling with Accurate Geometry and Finite Element AnalysisOral presentation
■ Research Themes
