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Dynamic Shear Stress of Tough-Pitch Copper at High Strain and High Strain-Rate
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  • Dynamic Shear Stress of Tough-Pitch Copper at High Strain and High Strain-Rate
  • Dynamic Shear Stress of Tough-Pitch Copper at High Strain and High Strain-Rate
저자명
Moon. Wonjoo,Seo. Songwon,Lim. Jaeyoung,Min. Oakkey
간행물명
KSME international journal
권/호정보
2002년|16권 11호|pp.1412-1419 (8 pages)
발행정보
대한기계학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Dynamic shear tests for the tough-pitch copper at high strain and high strain rate was performed. The Split Hopkinson Pressure Bar (SHPB) compression test system was modified to yield a shear deformation in the specimen. Hat-shaped specimens for the tough-pitch copper were adopted to generate high strain of γ=3~4 and high strain-rate of γ= 10$^4$/s. The dynamic analysis by ABAQUS 5.5/EXPLICIT code verified that shear zone can be localized in hat-shaped specimens. A proper impact velocity and the axial length of the shear localization region wert determined through the elastic wave analysis. The displacement in a hat-shaped specimen is limited by a spacer ring which was installed between the specimen and the incident bar. The shear bands were obtained by measuring the direction of shear deformation and the width of deformed grain in the shear zone. The decrease of specimen length has been measured on the optical displacement transducer. Dynamic shear stress-strain relations in the tough-pitch copper were obtained at two strain-rates.