Stress intensity factor evaluations for a curved crack in orthotropic particulate composites using an interaction integral method

ABSTRACT

This paper develops a domain-independent interaction integral (DII-integral) for extracting mixed-mode stress intensity factors (SIFs) for orthotropic materials with complex interfaces. The DII-integral does not require material property gradients, and moreover its validity is not affected by material interfaces. Combined with the extended finite element method (XFEM), the DII-integral is employed to investigate a straight crack in an orthotropic functionally graded plate and a curved crack in orthotropic particulate composites.

KEYWORDS:

• Crack
• orthotropic particulate composites
• domain-independent interaction integral (DII-integral)
• stress intensity factors (SIFs)
• extended finite element method (XFEM)

Additional information

Funding

Thepresent study was supported by the NSFC (Grant nos. 11772105 and 11572102) and the Fundamental Research Funds for the CentralUniversities.