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Intersonic crack propagation in homogeneous media under shear-dominated loading: theoretical analysis |
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| Authors: | Dhirendra V Kubair Philippe H Geubelle Yonggang Y Huang |
| Institution: | a Department of Aeronautical and Astronautical Engineering, MC 236, University of Illinois at Urbana-Champaign, 306 Talbot Lab.; 104 South Wright Street, Urbana, IL 61801, USA b Center for the Simulation of Advanced Rockets, University of Illinois at Urbana-Champaign, 306 Talbot Lab.; 104 South Wright Street, Urbana, IL 61801, USA c Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, 306 Talbot Lab.; 104 South Wright Street, Urbana, IL 61801, USA |
| Abstract: | The mechanics of cohesive failure under mixed-mode loading is investigated for the case of a steadily propagating subsonic and intersonic dynamic crack subjected to a follower tensile and shear distributed load. The cohesive failure model chosen in this study is rate independent but accounts for the coupling between normal and tangential damage. Special emphasis is placed here on mixed-mode cases with predominantly shear loading. The analysis shows that the size of the mixed-mode cohesive zone is smaller than that obtained in the pure shear case. The relative extent of the shear and tensile cohesive damage zones depends on the crack speed and the mode mixity. In the intersonic regime, the failure process takes place exclusively in shear, even under remote mixed-mode loading conditions. |
| Keywords: | A Dynamic fracture B Elastic material C Boundary integral equations |
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