On the Calculation of Energy Release Rate for Viscoelastic Cracked Laminates

LIU Yu-lan; WANG Biao; WANG Dian-fu

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LIU Yu-lan, WANG Biao, WANG Dian-fu. On the Calculation of Energy Release Rate for Viscoelastic Cracked Laminates[J]. Applied Mathematics and Mechanics, 2003, 24(1): 12-18.

Citation:

LIU Yu-lan, WANG Biao, WANG Dian-fu. On the Calculation of Energy Release Rate for Viscoelastic Cracked Laminates[J]. Applied Mathematics and Mechanics, 2003, 24(1): 12-18.

Citation:

LIU Yu-lan, WANG Biao, WANG Dian-fu. On the Calculation of Energy Release Rate for Viscoelastic Cracked Laminates[J]. Applied Mathematics and Mechanics, 2003, 24(1): 12-18.

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On the Calculation of Energy Release Rate for Viscoelastic Cracked Laminates

Research Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

Received Date: 2001-09-27
Rev Recd Date: 2002-08-25
Publish Date: 2003-01-15

Abstract

Abstract

The energy release rate(ERR) of crack growth as the energy change at the same time t between the two states of the structure is redefined, one is with crack length a under the loading σ(t), the other is the state with crack lengtha +Δa under the same loading condition. Thus the defined energy release rate corresponds to the released energy when a crack grows from a to a+Δa in an infinitesimal time. It is found that under a given loading histroy, the ERR is a function of time, and its maximum value should correspond with the critical state for delamination to propagate. Following William's work, the explicit expressions of ERR for DCB experimental configurations to measure the interfacial fracture toughness have been obtained through the classical beam assumption.
- compasite laminate,
- viscoelastic model,
- analysis delamination

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References(15)

References

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