Abstract
A new approach for extracting stress intensity factors (SIFs) by the element-free Galerkin (EFG) class of methods through a modified crack closure integral (MCCI) scheme is proposed. Its primary feature is that it allows accurate calculation of mode I and mode II SIFs with a relatively simple and straightforward analysis even when a coarser nodal density is employed. The details of the adoption of the MCCI technique in the EFG method are described. Its performance is demonstrated through a number of case studies including mixed-mode and thermal problems in linear elastic fracture mechanics (LEFM). The results are compared with published theoretical solutions and those based on the displacement method, stress method, crack closure integral in conjunction with local smoothing (CCI-LS) technique, as well as the M-integral method. Its advantages are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 25-39 |
| Number of pages | 15 |
| Journal | Finite Elements in Analysis and Design |
| Volume | 78 |
| DOIs | |
| Publication status | Published - 2014 |
| Externally published | Yes |
Keywords
- Crack closure integral Element-free Galerkin Meshfree methods Stress intensity factor Brittle fracture Computational mechanics Cracks Galerkin methods Accurate calculations Displacement method Linear-elastic fracture mechanics Mesh-free method Modified crack closure integral Theoretical solutions Stress intensity factors