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A simple method of long-term tensile creep-testing of ceramic materials is described, employing frictionless knife-edge universal joints and a gripping system which minimizes nonaxialities. The apparatus has a maximum constant load capability of 100 kg and was designed for use up to 1000 degrees C to test glass-ceramic materials. Some results are given which illustrate the reproducibility of the method, and an estimation of the errors involved in strain measurement is made.
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R. Morrell (1972) studied this question.
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