A recent paper has analysed high speed crack growth using a lumped mass-spring model which includes the effect of the contact stiffness. It was shown that the energy release rate G could be computed for this dynamic situation by using the kinetic energy of the mass. The model has been particularly s
The analysis of dynamic fracture using lumped mass-spring models
β Scribed by J. G. Williams
- Book ID
- 104616440
- Publisher
- Springer Netherlands
- Year
- 1987
- Tongue
- English
- Weight
- 671 KB
- Volume
- 33
- Category
- Article
- ISSN
- 1573-2673
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β¦ Synopsis
It is shown that many dynamic effects in fracture can be usefully modelled using lumped mass-spring models of the fracturing specimens, since many effects are not a consequence of stress waves but of the dynamic behaviour of the specimen and loading system. When the energy release rate, G, is calculated for specimens with harmonic motions present, it is found that multiple solutions occur which, if analysed using quasi-static calibration factors, can give apparent scatter and limiting speeds in G c. This simple approach can be used to interpret several types of experimental data.
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