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On the calculation of energy release rates for cracked laminates

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Abstract

A general method is given for calculating the energy release rate G from the local values of bending moments and loads in a cracked laminate. This total value is then partitioned into mode I and II components. Examples are given of the analysis of several test geometries including both variable and constant ratio mixed mode tests. Solutions for compression failures with buckling are also given. Finally there is some discussion of specimen compliances and stability criteria for fixed load and fixed displacement.

Résumé

On fournit une méthode générale de calcul de la vitesse G de relaxation de l'énergie, à partir des valeurs locales des moments de flexion et des charges agissant sur un composite lamellaire fissurée. On divise selon les composantes de Mode I et de Mode II la valeur totale obtenue. Des exemples d'analyse appliquée à diverses géométries d'essai sont fournis, qui sont relatifs à des essais de mode mixte à ratios variable ou constant. On fournit également les solutions relatives à de la ruine par compression avec flambage. Enfin, on discute de la compliance des éprouvettes et des critères de stabilité dans le cas de charge imposées et de déplacements imposés.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Imperial College, SW7, London, U.K.

    J. G. Williams

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  1. J. G. Williams
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Williams, J.G. On the calculation of energy release rates for cracked laminates. Int J Fract 36, 101–119 (1988). https://doi.org/10.1007/BF00017790

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  • DOI: https://doi.org/10.1007/BF00017790

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