Behavior of indentation cracks near free surfaces and interfaces
| Autor: | T. J. Lardner, M. L. Shiao, M. R. Lin, J. E. Ritter |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Materials science
Fissure Computational Mechanics Crack tip opening displacement Fracture mechanics Crack closure medicine.anatomical_structure Mechanics of Materials Modeling and Simulation Indentation Free surface Forensic engineering medicine Knoop hardness test Composite material Stress intensity factor |
| Zdroj: | International Journal of Fracture. 44:133-143 |
| ISSN: | 1573-2673 0376-9429 |
| DOI: | 10.1007/bf00047064 |
| Popis: | The purpose of this research was to examine problems associated with the propagation of cracks near a free surface and near the interface of a glass/epoxy bonded system. Crack propagation was induced by placing Knoop indentations in the glass at various sites adjacent to and remote from the surface or interface. These experimental studies were supplemented by finite element stress analysis. Experiments show that for an indent parallel to the surface or interface, the initial direction of crack propagation from the indent is always toward the surface or interface and then as the crack approaches the surface or interface, the crack path deviates away from the surface. Results of finite element analysis show that the initial direction of crack propagation is in the direction normal to the maximum principal stress at the crack tip. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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