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Analysis of crack propagation in double cantilever beam tests of multidirectional laminates

Tipo de material: TextoTextoSeries ; Mechanics of Materials, 35(7), p.641-652, 2003Trabajos contenidos:
  • De Morais, A.B
  • De Moura, M.F
  • Goncalves, J.P.M
  • Camanho, P.P
Tema(s): Recursos en línea: Resumen: This paper presents numerical analyses of crack propagation in double cantilever beam (DCB)tests of multidirectional laminates. Three-dimensional finite element models were used for application of the virtual crack closure technique and for simulation of crack growth with a progressive damage model. The analyses were concerned with three features that may affect the measurements of the mode I critical strain energy release rate GIc: residual stresses, modemixity and curved delamination fronts. The results showed that the effects of those features could be minimised by a proper selection of specimen stacking sequences. The suitability of other DCB specimens proposed in the literature to avoid intralaminar damage and crack jumping was also evaluated.
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This paper presents numerical analyses of crack propagation in double cantilever beam (DCB)tests of multidirectional laminates. Three-dimensional finite element models were used for application of the virtual crack closure technique and for simulation of crack growth with a progressive damage model. The analyses were concerned with three features that may affect the measurements of the mode I critical strain energy release rate GIc: residual stresses, modemixity and curved delamination fronts. The results showed that the effects of those features could be minimised by a proper selection of specimen stacking sequences. The suitability of other DCB specimens proposed in the literature to avoid intralaminar damage and crack jumping was also evaluated.

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