Subsurface cracks under tensile and shear loading

Fuqian Yang, Caifu Qian, James C. Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The problem of a subsurface crack parallel and close to the surface of a semi-infinite medium was studied by dislocation modeling and finite element analysis. The loading is applied over the surface of the semi-infinite medium. For tensile loading the dislocation model gives the same result as the finite element method. For shear loading, the crack faces penetrate each other for the traction free crack surfaces. Using the ABAQUS code and the 'interface' or 'gap' elements over the crack faces, the overlap problem was avoided. It is found that one end of the crack is closed and the other is open and the Mode II stress intensity factor at the closed crack tip is larger than that at the open tip. All the stress intensity factors increase as the subsurface crack approaches the surface.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Number of pages10
StatePublished - 1995
EventOptical Manufacturing and Testing - San Diego, CA, USA
Duration: Jul 9 1995Jul 11 1995

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceOptical Manufacturing and Testing
CitySan Diego, CA, USA

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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