Graduate School of Science and Engineering（Engineering）
理工学専攻（機械工学）
日本語
Update date：2025/01/15
Professor
Zhu Xia

Affiliation

  1. Ehime UniversityGraduate School of Science and Engineering Engineering for Production and EnvironmentProfessor
  2. Ehime UniversityGraduate School of Science and Engineering Engineering for Production and Environment教授

Research History

  1. 2000-2005Department of Mechanical Engineering, Faculty of Engineering, Ehime University工学部 機械工学科

Education

  1. Ehime University2000

Degree

  1. Engineering DoctorEhime University

Research Interests

  1. 塑性加工，材料力学，材料強度，機械材料

Research Projects

  1. Ehime UniversityEvaluation Method of Thermal Shock for Porous CeramicsGrant-in-Aid for Scientific Research (C)
  2. Ehime UniversityDevelopment of Novel Plastic Working Method for Enlargement Partial Diameter on ShaftGrant-in-Aid for Scientific Research (C)
  3. Ehime UniversityProcessing Method Development for Forming Boss or Bellows on Hollow Shafts by Using of Mechanical Ratchet PhenomenonGrant-in-Aid for Scientific Research (C)
  4. Ehime UniversityNew near-net-shape working method for shaft's cross sections partially enlarged and controlled by cyclic bending and axial compressive loading through metal moldsGrant-in-Aid for Scientific Research (C)
  5. Development of Novel Plastic Working Method for Enlargement Partial Diameter on Shaft基盤研究(C)Principal investigator
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Papers

  1. Deformation Mechanisms of Metal Diaphragms Due to Repeated Valve Actuation: A Preliminary Study Towards Fatigue Life2023/11Deformation Mechanisms of Metal Diaphragms Due o Repeated Valve Actuation A Preliminary Study Towards Fatigue LifeProceedings of the annual International Conference on Structural Engineering and Materials (ICSEM 2023)Research paper (international conference proceedings)
  2. 液中プラズマCVD法による単結晶ダイヤモンド合成に関する基礎研究2022岡本孝祐 豊田洋通 朱霞日本材料学会四国支部学術講演会講演論文集19th (Web)
  3. 木製パレット構造設計に関する基礎研究2022越智陽 朱霞 豊田洋通 伊藤大樹日本材料学会四国支部学術講演会講演論文集19th (Web)
  4. Study on wrinkles during rotary-draw bending forming2018Xia Zhu Keiji Ogi Nagatoshi OkabeMaterials Science Forum943 MSF, 43-47Research paper (international conference proceedings)10.4028/www.scientific.net/MSF.943.43© 2019 Trans Tech Publications, Switzerland. The purpose of this research is to determine the state inside the material using finite-element analysis and to improve the performance of a rotary-draw bending forming by clarifying the mechanism of wrinkle generation. An analytical model of rotational drawing was made by using the general-purpose nonlinear finite-element analysis software MSC Marc, and the analytical results were compared with experimental results to verify the validity of the model. Furthermore, the mechanism of wrinkle generation was investigated. With the progress of processing, wrinkles occur not in the R part but in the original tube-side straight-tube part. The coefficient of friction between the tube material and the R portion of the bending mold promotes the occurrence of wrinkles and the growth of the generated wrinkles. Because wrinkles occur even if the friction coefficient between the tube material and bending mold R part is ignored, the generation condition of wrinkles also depends on parameters other than the friction coefficient.
  5. Influence of fillet radius of die end on workability of diameter-enlarged process2018Xia Zhu Keiji Ogi Nagatoshi OkabeMaterials Science Forum943 MSF, 34-42Research paper (international conference proceedings)10.4028/www.scientific.net/MSF.943.34© 2019 Trans Tech Publications, Switzerland. This study focus on the diameter-enlarged ratio, which is an important parameter for evaluating the workability of a partial diameter-enlarged process. Moreover, the study attempts to explain the influence of the fillet radius of the die end on the fatigue characteristic of the test piece after forming and the limit of the diameter-enlarged ratio without fatigue damage in the forming process. Three types of dies with different fillet deformations were used, and tensile tests were carried out after the processing was performed on three types of carbon steel. The fatigue properties of the test specimens after forming and the limit of the diameter-enlarged ratio at which no fatigue damage occurred were investigated. The results obtained are as follows: increasing the fillet radius of the die helped to ease the stress concentration at the root of the diameter-enlarged part, and shaft diameter-enlarged processing could be done without fatigue damage. Using a die having a radius equal to or larger than the appropriate fillet radius helped to increase fatigue strength, without causing fatigue damage, even if the diameter-enlarged ratio increased; notch sensitivity increased with an increase in the diameter-enlarged ratio, but the apparent notch sensitivity coefficient decreased with an increase in fillet radius in all the test pieces. A large limit for the diameter-enlarged ratio without fatigue damage may be obtained by using a die with an appropriate fillet radius.
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Presentations

  1. Structural design to improve strength and rigidity in wooden pallets日本機械学会　中国四国学生会　第５１回学生員卒業研究発表講演会2021/03/04Oral presentation(general)
  2. Effect of friction conditions on material deformation behavior in deep drawing日本機械学会　中国四国学生会　第５１回学生員卒業研究発表講演会2021/03/04
  3. 軸肥大加工法における座屈による肥大部の折れ曲がり現象日本機械学会 中国 四学生会 第 46回学生卒業論文研究発表講演会論文集2016/03/08Oral presentation(general)
  4. 軸肥大加工法が疲労強度に及ぼす影響日本機械学会中国四国支部・九州支部合同企画講演会講演論文集2010/10/01URL
  5. 414 A New Concept "JIKUHIDAI" Processing and Mathematical Model for Enlarging Deformation Behavior学術講演会講演論文集2009/05/22URL
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Works

  1. 軸肥大加工法に関する研究 （ステンレス材の磁化特性，高速回転の効果，チタン材への適用）2009-2009
  2. 軸肥大加工に関する研究 （超音波を印加した圧縮試験）2009-2009
  3. 配管材の回転引き曲げ加工におけるスプリングバックと伸び2009-2009
  4. 軸肥大加工への超音波利用可能性の検討2008-2008
  5. 回転引き曲げ加工における薄肉鋼管の変形挙動解析2008-2008
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Awards

  1. 2016/05優秀発表賞
  2. 2010/03日本機械学会 中国四国学生会 第40回学生員卒業研究発表講演会 優秀発表賞
  3. 2009/07中国・四国工学教育協会賞
  4. 2009/03日本機械学会 中国四国学生会 第39回学生員卒業研究発表講演会 優秀発表賞
  5. 2008/03日本機械学会 中国四国支部 日本機械学会フェロー賞 若手優秀講演
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Allotted Class

  1. 2024Science and Technology Today
  2. 2024Science and Technology Today
  3. 2024Egineering Ethics, Intellectual Property, Career Education II
  4. 2024Egineering Ethics, Intellectual Property, Career Education II
  5. 2024Egineering Ethics, Intellectual Property, Career Education II
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