Monotonic Compressive Strength of Advanced Ceramics ASTM C1424

Monotonic Compressive Strength of Advanced Ceramics ASTM C1424

This test method covers the determination of compressive strength including stress-strain behavior, under monotonic uniaxial loading of advanced ceramics, at ambient temperature. Compression tests provide information on the strength and deformation of materials under uniaxial compressive stresses.

    Scope:

    ASTM C1424 test technique covers the determination of compressive strength of advanced ceramics under uniaxial loading at ambient temperature (at a steady rate with no reversals from test initiation to final breakage). Compression testing is used to identify a material’s behavior or response when subjected to a compressive force by measuring fundamental factors including strain, stress, and deformation. Compression tests reveal a material’s strength and deformation when subjected to uniaxial compressive forces. 

    This test method is designed for advanced ceramics that demonstrate macroscopically isotropic,  homogenous, and continuous behavior. Quality assurance, characterization, comparison, and research & development are all possible applications for this test procedure.

    Test Procedure:

    For ASTM C1424 test, the specimens are cured underwater at a temperature equal to 18 ± 1°C  until they have reached the testing ages. After seven days or 28 days of curing, these specimens are evaluated on compression testing equipment. The test specimen is then put between two plates that distribute the applied force over the full surface area of two opposed faces of the test sample, and the plates are pushed together by compression testing equipment, flattening the sample. A compressed sample is usually decreased in the direction of the applied forces and expanded in the opposite direction. The load is directed at a constant rate of 140 kg/cm2 per minute until the specimen fails or ruptures. 

    Specimen Size : 

    Typically, ASTM C1424 uses a contoured, cylindrical test specimen with consistent stresses in the gauge section and negligible stress concentrations at geometric transitions. 

    Data:

    A compression test is the contrary of a tension test, which is more prevalent. Compressive strength measurements are expressed in force per unit area.

    i.e. Compressive strength = P/A (N/mm2) where,  

    P = Applied load (N)  

    A = Area of the specimen (mm2)

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