International Journal of Precision Engineering and Manufacturing

Korean Society for Precision Engineering (한국정밀공학회)
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Impact Damage on Brittle Materials with Small Spheres (I)

  • Woo, Su-Chang (Department of Mechanical Design Engineering, Graduate School, Pusan National University) ;
  • Kim, Moon-Saeng (School of Mechanical Engineering, Pusan National University) ;
  • Shin, Hyung-Seop (School of Mechanical Engineering, Andong National University) ;
  • Lee, Hyeon-Chul (Department of Computer Aided Design, Doowon Technical College)
  • Published : 2003.01.01
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Abstract

Brittle materials such as glasses and ceramics, which are very weak under impact loading, show fragile failure mode due to their low fracture toughness and crack sensitivity. When brittle materials are subjected to impact by small spheres, high contact pressure occurs at the impacted surface causing local damage on the specimen. This damage is a dangerous factor in causing the final fracture of structures. In this research, the crack propagation process of soda-lime glass by the impact of small spheres is explained and the effects of several constraint conditions for impact damage were studied by using soda-lime glass; that is, the effects for the materials and sizes of impact ball, thickness of specimen and residual strength were evaluated. Especially, this research has focused on the damage behavior of ring cracks, cone cracks and several other kinds of cracks.

Keywords

References

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