Further studies of the maximum stress criterion on the angled crack problem

Prediction of the angle of initial crack extension, critical load and unstable crack paths based on the criteria of maximum tangential stress (MTS), maximum tangential principal stress (MTPS), maximum tangential strain (MTSN), and strain energy density (SED) are compared for slit and elliptical cracks under pure shear loading and elliptical cracks under uniaxial compressive loading. Results presented here complement those in Part I of this investigation. Some of the theoretical predictions have been compared with data available in the literature.All the four criteria are found to be more or less equally applicable in the cases studied for the prediction of direction of initial crack extension and critical load. The unstable crack paths based on the four criteria differ, the difference being greatest for the SED criterion. Some difficulties are found on applying this criterion to some situations.

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Comparison of the criteria for mixed mode brittle fracture based on the preinstability stress-strain field Part I: Slit and elliptical cracks under uniaxial tensile loading

Maiti

Smith

1983

Int J Fract

119

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Predictions for the angle of crack extension, critical load and unstable crack paths based on the criteria of maximum tangential stress (MTS), maximum tangential strain (MTSN) and strain energy density (SED) for angled slit and elliptical cracks under uniaxial tensile loading are compared. The tangential stress associated with the MTS criterion need not be a principal stress and a new approach to this criterion is suggested. A criterion based on maximum tangential principal stress (MTPS) is proposed. Predictions by these two criteria are compared. Some difficulties associated with the application of the SED criterion are indicated. A new basis, which permits a unification of all the criteria in respect of prediction of critical load, is suggested. Some of the results have been compared with data available in the literature.

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Further studies of the maximum stress criterion on the angled crack problem

Cited by 28 publications

References 25 publications

Crack growth based on energy balance

Crack growth based on energy balance

Comparison of the criteria for mixed mode brittle fracture based on the preinstability stress-strain field

Comparison of the criteria for mixed mode brittle fracture based on the preinstability stress-strain field Part I: Slit and elliptical cracks under uniaxial tensile loading

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