In Situ Cube-Corner Indentation of Soda–Lime Glass and Fused Silica |
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Authors: | Dylan J. Morris Robert F. Cook |
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Affiliation: | Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455 |
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Abstract: | Indentation fracture with a cube-corner diamond pyramid on soda–lime silicate glass and fused silica is investigated during the entire indentation cycle in both silicone oil and ambient-air environments. Radial cracks form immediately on loading in all cases. The two-component, elastic-contact + elastic-plastic mismatch (residual) stress field model that has been used successfully to describe radial crack evolution at Vickers indentations fails to describe the fracture response with the cube-corner. The amplitudes of both elastic-contact and residual stress-intensity factors as deduced from these cube-corner experiments are up to a factor of 10 greater than have been previously observed. |
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Keywords: | indentation soda-lime silica |
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