FRACTURE ENERGY RELEASE RATE IN FUNCTIONALLY GRADED MATERIALS[J]. MECHANICS IN ENGINEERING, 2003, 25(1). DOI: 10.6052/1000-0992-2002-202
Citation: FRACTURE ENERGY RELEASE RATE IN FUNCTIONALLY GRADED MATERIALS[J]. MECHANICS IN ENGINEERING, 2003, 25(1). DOI: 10.6052/1000-0992-2002-202

FRACTURE ENERGY RELEASE RATE IN FUNCTIONALLY GRADED MATERIALS

  • A simple method of calculating the energy release rateof crack in functionally graded materials is proposed. The doublecantilever beam theory is used to derive the formulae of G_\rm I^\rmg. As an example for the use of this method three typical graded materialsare evaluated. The results show that the modulus gradient has a greatinfluence on the fracture energy. When the crack extends in thedirection where the modulus is getting smaller, the energy release rateis smaller than that in the opposite direction.
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