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

✍ Scribed by S. K. Maiti; R. A. Smith

• Publisher: Springer Netherlands
• Year: 1984
• Tongue: English
• Weight: 821 KB
• Volume: 24
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00020264

✦ Synopsis

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.