Structural Engineering and Mechanics

  • 제72권2호
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  • Pages.245-256
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  • 2019
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Reliable experimental data as a key factor for design of mechanical structures

  • Brnic, Josip (Department of Engineering Mechanics, University of Rijeka, Faculty of Engineering) ;
  • Krscanski, Sanjin (Department of Engineering Mechanics, University of Rijeka, Faculty of Engineering) ;
  • Brcic, Marino (Department of Engineering Mechanics, University of Rijeka, Faculty of Engineering) ;
  • Geng, Lin (School of Material Science and Engineering, Harbin Institute of Technology) ;
  • Niu, Jitai (School of Material Science and Engineering, Harbin Institute of Technology) ;
  • Ding, Biao (College of Material Science and Engineering, Shanghai University)
  • 투고 : 2019.03.09
  • 심사 : 2019.07.05
  • 발행 : 2019.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

The experimentally determined mechanical behavior of the material under the prescribed service conditions is the basis of advanced engineering optimum design. To allow experimental data on the behavior of the material considered, uniaxial stress tests were made. The aforementioned tests have enabled the determination of mechanical properties of material at different temperatures, then, the material's resistance to creep at various temperatures and stress levels, and finally, insight into the uniaxial high cyclic fatigue of the material under different applied stresses for prescribed stress ratio. Based on fatigue tests, using modified staircase method, fatigue limit was determined. All these data contributes the reliability of the use of material in mechanical structures. Data representing mechanical properties are shown in the form of engineering stress-strain diagrams; creep behavior is displayed in the form of creep curves while fatigue of the material is presented in the form of S-N (maximum applied stress versus number of the cycles to failure) curve. Material under consideration was 18CrNi8 (1.5920) steel. Ultimate tensile strength and yield strength at room temperature and at temperature of $600^{\circ}C$: [${\sigma}_{m,20/600}=(613/156)MPa$; ${\sigma}_{0.2,20/600}=(458/141)MPa$], as well as endurance (fatigue) limit at room temperature and stress ratio of R = -1 : (${\sigma}_{f,20,R=-1}=285.1MPa$).

키워드

과제정보

연구 과제번호 : Investigation, analysis and modeling the behavior of structural elements stressed at room and high temperatures, Failure analysis of materials in marine environment

연구 과제 주관 기관 : University of Rijeka

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피인용 문헌

  1. Deformation Behavior of C15E + C Steel under Different Uniaxial Stress Tests vol.10, pp.11, 2019, https://doi.org/10.3390/met10111445