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Mechanics in Engineering ›› 2003, Vol. 25 ›› Issue (1): 0-0.doi: 10.6052/1000-0992-2002-202

• Application study •    

FRACTURE ENERGY RELEASE RATE IN FUNCTIONALLY GRADED MATERIALS

  

  • Received:2002-05-29 Revised:1900-01-01 Online:2003-02-10 Published:2003-02-10

Abstract: A simple method of calculating the energy release rate of crack in functionally graded materials is proposed. The double cantilever beam theory is used to derive the formulae of $G_{\rm I}^{\rm g}$. As an example for the use of this method three typical graded materials are evaluated. The results show that the modulus gradient has a great influence on the fracture energy. When the crack extends in the direction where the modulus is getting smaller, the energy release rate is smaller than that in the opposite direction.

Key words: functionally graded materials, crack, energy release rate