Strength of Diametrically Compressed C-ring ASTM C1323

Strength of Diametrically Compressed C-ring ASTM C1323

The test method in ASTM C1323 evaluates the ultimate strength under nonstop compressive loading of advanced C-ring ceramics without any reversals from test initiation to final structure, at ambient temperatures.

    Scope:

    The test methods in ASTM C1323 can be used for material comparison, material development, characterization, and quality assurance. On considering a C-ring under diametrical compression, the maximum tensile stress is produced at the outer surface. The condition on the inner surface may not matter much with regards to specimen testing.

    Test Procedure:

    Following the test procedures in ASTM C1323, a minimum of four measurements at periodically spaced intervals with two load points are recommended. The measured value of internal diameter is divided by two, this gives a local nominal internal radius. Adding the local wall thickness gives the nominal external radius. It is mandatory to note that all the stress and Weibull calculations incorporate actual sample dimensions. The specimen must be aligned centrally below the axis of applied loading. The loading points are present at 90° and 270°.

    Sample size:

    A circular sample is used in ASTM C1323 test, which can be either glazed or unglazed. To maintain plane stress conditions, the width of the sample must be one time, while not exceeding four times the thickness. The slot height in the C-ring specimen has to be at least equal to the width of the specimen.

    Data:

    The flexure stress in ASTM C1323 is computer simulated which is based on a simple curved beam theory, assuming that the specimen material is homogeneous and isotropic. Average grain size must not be greater than one fiftieth of the C-ring thickness.

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