Dynamic Compression Strength of Ceramics: What was Learned from an Interlaboratory Round Robin Exercise

Published

September 4, 2020

Author(s)

Jeffrey Swab, Wayne Chen, James Hogan, Hangjie Liao, Calvin Lo, Steven Mates, Christopher Meredith, John Pittari, Richard Rhorer, George Quinn

Abstract

The dynamic compressive strength of a commercial alumina was determined by five participants using the Split-Hopkinson pressure bar (SHPB) method with a dumbbell-shaped specimen. Each participant used their own SHPB test apparatus and imaging set-up to conduct the tests and capture the fracture process. The dumbbell-shaped specimen was designed to increase the likelihood of fracture commencing in the specimen gage section rather than at the interface of the specimen and the SHPB bars. The participants had a good success rate (between 40% to 80%) of tests being valid, even though this was the first time several of the participants had used this specimen geometry. The average dynamic compression strength from the five participants were in excellent agreement with each other and ranged from 4.40 GPa to 4.92 GPa with a grand average of 4.61 ± 0.25 GPa (the average of the laboratory averages). The high success rate and remarkable consistency of the results show that the dumbbell-shaped specimen is an appropriate geometry to determine the dynamic compression strength of advanced ceramics using the SHPB test methodology.

Citation

Journal of Dynamic Behavior of Materials

Pub Type

Journals

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DOI Link

Keywords

Dynamic compression strength, ceramics, Split-Hopkinson pressure bar, Dumbbell specimen, Round robin exercise

Citation

Swab, J. , Chen, W. , Hogan, J. , Liao, H. , Lo, C. , Mates, S. , Meredith, C. , Pittari, J. , Rhorer, R. and Quinn, G. (2020), Dynamic Compression Strength of Ceramics: What was Learned from an Interlaboratory Round Robin Exercise, Journal of Dynamic Behavior of Materials, [online], https://doi.org/10.1007/s40870-020-00264-6 (Accessed April 19, 2024)