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Study of Dynamic Crack Propagation in 3PB Steel Specimens Loaded by Impact
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  • Study of Dynamic Crack Propagation in 3PB Steel Specimens Loaded by Impact
  • Study of Dynamic Crack Propagation in 3PB Steel Specimens Loaded by Impact
저자명
Cho. Jae-Ung,Cho. Chong-Du,Han. Moon-Sik
간행물명
International journal of precision engineering and manufacturing
권/호정보
2009년|10권 2호|pp.67-72 (6 pages)
발행정보
한국정밀공학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

Crack propagation in ductile steel was investigated using impact-loaded three-point bending (3PB) specimens. Results from experiments and numerical simulations were compared. The specimens were $320{ imes}75;mm$ by 10 mm thick. A new 3PB specimen design with reduced width at the ends was developed to avoid the influence of uncertain boundary conditions at the impact heads. One static and two dynamic tests with impact velocities of 30.2 and 45.2 m/s were performed. High-speed photography was used to obtain crack growth and crack tip opening displacement data. Moire interference patterns were used to directly measure the relative rotation of the two specimen halves. Shear lip fracture surfaces were obtained for all three loading conditions. The experiments indicated no, or only a slight, loading rate influence on the crack propagation.