Abstract
Abstract The objective of this project was to determine the usefulness and limitations of a modified indentation hardness test in determining the creep resistance of plastics. Tests were run on 13 different materials and correlations were made between the modified hardness test and torsional creep tests at a 1000-psi (6895-kPa) stress level up to 500 h. The modified hardness test may be used as a screening test for creep performance as it allows determination of expected creep performance at a very early stage of material evaluation, where there are usually limited amounts of material available. Equations were developed to allow the prediction of creep performance. The correlations developed are not applicable to anisotropic materials.
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