1. Stress rate sensitivity of Paskapoo sandstone under flexure.
- Subjects
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SANDSTONE , *IMPACT testing , *FRACTURE toughness , *POISSON'S ratio , *FLEXURAL strength - Abstract
This paper evaluates the dynamic flexural response of sandstone from the Paskapoo formation in Alberta. Sandstone prisms were subjected to quasi-static flexure as per ASTM while a drop-weight impact tester was employed to generate stress rates up to 108 kPa/s. Companion testing under quasi-static compression on sandstone cylinders helped establish baseline properties including the compressive strength, elastic modulus, and Poisson's ratio. It was found that the flexural strength and fracture toughness of Paskapoo sandstone obey stress rate sensitive models developed originally for concrete. However, the fracture toughness was more stress rate sensitive than its flexural strength. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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