한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제18권11호
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  • Pages.93-100
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  • 2001
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

취성재료의 소구충돌에 의한 충격손상 (I)

Impact Damage on Brittle Materials with Small Spheres (I)

  • 우수창 (부산대학교 기계설계학과 대학원) ;
  • 김문생 (부산대학교 기계공학부) ;
  • 신형섭 (안동대학교 기계공학과) ;
  • 이현철 (두원공과대학 컴퓨터 응용설계학과)
  • 발행 : 2001.11.01
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초록

Brittle materials are very weak for impact because of typical characteristics which happen to be easily fractured with low fracture toughness and crack sensitivity. When brittle materials are subjected to impact due to small spheres, high contact pressure is occurred to impact surface and then local damage on specimen is developed, since there are little plastic deformations due to contact pressure compared to metals. This local damage is a dangerous factor which gives rise to final fracture of structures. In this research, the crack propagation process of soda lime glass by impact of small sphere is explained and the effects of the constraint conditions of impact spheres and materials for the material 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. Especially, this research has focused on the damage behavior of ring crack, cone crack and several kinds of cracks.

키워드

참고문헌

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