A Proposed Uniaxial Compression Test for High Strength Ceramics
ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA CERAMICS RESEARCH DIV
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Compressive strength is critical to the performance of ceramics in armor, machine tool bits, and compressively loaded structural components. Traditional compression tests yield misleadingly low values for high strength ceramics. A new test, utilizing a dumbbell-shaped specimen, has been developed and has successfully measured the strength of Al2O3, B4C, TiB2, and SiC. Compression strengths approaching 7 GPa 1 million psi were measured. Results were accurate, reproducible, and consistent with present compressive fracture theory. A finite element analysis FEA was done to confirm a uniaxial stress state. An error analysis examines the severity of procedural errors. The test is simple and cost effective to perform.
- Ceramics, Refractories and Glass