Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Impact Fracture Behavior of Ceramic Plates Using Instrumented Long Bar

계장화한 긴 바를 사용한 세라믹판의 충격 파괴 거동

  • Sin, Hyeong-Seop (Dept.of Mechanical Engineering, Andong National University) ;
  • O, Sang-Yeop (Dept.of Mechanical Engineering, Graduate School of Kyungpook National University) ;
  • Choe, Su-Yong (Dept.of Mechanical Engineering, Graduate School of Andong National University) ;
  • Seo, Chang-Min (Dept.of Mechanical Engineering, Kyungpook National University) ;
  • Jang, Sun-Nam (Agency for Defense Development)
  • 신형섭 (안동대학교 기계공학부) ;
  • 오상엽 (경북대학교 대학원 기계공학과) ;
  • 최수용 (안동대학교 대학원 기계공학과) ;
  • 서창민 (경북대학교 기계공학부) ;
  • 장순남 (국방과학연구소)
  • Published : 2002.04.01
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Abstract

In this study, a bar impact test of low velocity was carried out to gain an insight into the damage mechanism and sequence induced in alumina plates(AD 85 and AD 90) under impact conditions. An experimental setup utilizing an instrumented long bar impact was devised, that can measure directly the impact force applied to the specimen and supply a compressive contact pressure to the specimen. During the bar impact testing, the influences of the contact pressure applied along the impact direction to the specimen on the fracture behavior were investigated. The measured impact force profiles explained well the damage behavior induced in alumina plates. The higher contact pressure to the specimen led to the less damage due to the suppression of radial cracks due to the increase in the apparent flexural stiffness of plate. It had produced the change of damage pattern developed in the specimen; from the radial cracks to the local contact stress dominant damage. It would contribute to the improvement of the ballistic property in ceramic plates. The observed results showed the following sequence in damage developed: The development of cone crack at impact region, the formation of radial cracks from the rear surface of plate depending on the plate thickness, the occurrence of crushing within the cone envelope and the fragmentation.

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References

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Cited by

  1. A Steel Ball Impact Damage Behavior of RS-SiC Ceramic Materials vol.34, pp.8, 2010, https://doi.org/10.3795/KSME-A.2010.34.8.1015