Fracture modes in curved brittle layers subject to concentrated cyclic loading in liquid environments

Jae Won Kim, Van P. Thompson, E. Dianne Rekow, Yeon Gil Jung, Yu Zhang

Research output: Contribution to journalArticle

Abstract

Damage response of brittle curved structures subject to cyclic Hertzian indentation was investigated. Specimens were fabricated by bisecting cylindrical quartz glass hollow tubes. The resulting hemicylindrical glass shells were bonded internally and at the edges to polymeric supporting structures and loaded axially in water on the outer circumference with a spherical tungsten carbide indenter. Critical loads and number of cycles to initiate and propagate near-contact cone cracks and far-field flexure radial cracks to failure were recorded. Flat quartz glass plates on polymer substrates were tested as a control group. Our findings showed that cone cracks form at lower loads, and can propagate through the quartz layer to the quartz/polymer interface at lower number of cycles, in the curved specimens relative to their flat counterparts. Flexural radial cracks require a higher load to initiate in the curved specimens relative to flat structures. These radial cracks can propagate rapidly to the margins, the flat edges of the bisecting plane, under cyclic loading at relatively low loads, owing to mechanical fatigue and a greater spatial range of tensile stresses in curved structures.

Original languageEnglish (US)
Pages (from-to)1075-1081
Number of pages7
JournalJournal of Materials Research
Volume24
Issue number3
DOIs
StatePublished - Mar 2009

Fingerprint

Quartz
cracks
Cracks
quartz
Liquids
liquids
Glass
Cones
glass
cones
Polymers
cycles
tungsten carbides
Tungsten carbide
circumferences
flexing
polymers
tensile stress
indentation
Indentation

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics

Cite this

Fracture modes in curved brittle layers subject to concentrated cyclic loading in liquid environments. / Kim, Jae Won; Thompson, Van P.; Rekow, E. Dianne; Jung, Yeon Gil; Zhang, Yu.

In: Journal of Materials Research, Vol. 24, No. 3, 03.2009, p. 1075-1081.

Research output: Contribution to journalArticle

Kim, Jae Won ; Thompson, Van P. ; Rekow, E. Dianne ; Jung, Yeon Gil ; Zhang, Yu. / Fracture modes in curved brittle layers subject to concentrated cyclic loading in liquid environments. In: Journal of Materials Research. 2009 ; Vol. 24, No. 3. pp. 1075-1081.
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