A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Development of Asphalt Concrete Dogbone Shape Specimens for Uniaxial Tension Testing
In uniaxial fatigue testing, breaks near the loading platen away from the middle of the sample are still common despite different proposed solutions to avoid them. This paper presents finite element results used to develop dog-bone shape specimens for uniaxial tensile testing. A configuration was selected such that in the middle of the sample the strain distribution is substantially more uniform than those obtained with traditional cylindrical samples, and the maximum strain occurs in the middle of the sample instead of near the plate. The trimming procedure, challenges faced to avoid end failures, and the restoration of a smooth dog-bone shape of trimmed samples with epoxy are also explained. The simulation results were validated by testing eight specimens of four different mixes using a stress controlled tensile repeated load-recovery tests performed at 40°C. All the trimmed-epoxy smoothed samples tested broke consistently in the middle, thus validating the selected design.
Development of Asphalt Concrete Dogbone Shape Specimens for Uniaxial Tension Testing
In uniaxial fatigue testing, breaks near the loading platen away from the middle of the sample are still common despite different proposed solutions to avoid them. This paper presents finite element results used to develop dog-bone shape specimens for uniaxial tensile testing. A configuration was selected such that in the middle of the sample the strain distribution is substantially more uniform than those obtained with traditional cylindrical samples, and the maximum strain occurs in the middle of the sample instead of near the plate. The trimming procedure, challenges faced to avoid end failures, and the restoration of a smooth dog-bone shape of trimmed samples with epoxy are also explained. The simulation results were validated by testing eight specimens of four different mixes using a stress controlled tensile repeated load-recovery tests performed at 40°C. All the trimmed-epoxy smoothed samples tested broke consistently in the middle, thus validating the selected design.
Development of Asphalt Concrete Dogbone Shape Specimens for Uniaxial Tension Testing
Archilla, A. R. (author) / Corrales-Azofeifa, J. (author)
International Conference on Highway Pavements and Airfield Technology 2017 ; 2017 ; Philadelphia, Pennsylvania
2017-08-24
Conference paper
Electronic Resource
English
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