Abstract
This paper is directed towards finite element computation of fracture parameters in functionally graded material (FGM) assemblages of arbitrary geometry with stationary cracks. Graded finite elements are developed where the elastic moduli are smooth functions of spatial co-ordinates which are integrated into the element stiffness matrix. In particular, stress intensity factors for mode I and mixed-mode two-dimensional problems are evaluated and compared through three different approaches tailored for FGMs: Path-independent Jk*-integral, modified crack-closure integral method, and displacement correlation technique. The accuracy of these methods is discussed based on comparison with available theoretical, experimental or numerical solutions.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1903-1935 |
| Number of pages | 33 |
| Journal | International Journal for Numerical Methods in Engineering |
| Volume | 53 |
| Issue number | 8 |
| DOIs | |
| State | Published - Mar 20 2002 |
Keywords
- Displacement correlation
- Finite element method (FEM)
- Functionally graded material (FGM)
- J-integral
- Modified crack closure
- Stress intensity factor (SIF)
ASJC Scopus subject areas
- Numerical Analysis
- General Engineering
- Applied Mathematics