Long-term compressive creep deformation and damage in acrylic bone cements.
作者： Daniel J. Chwirut
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摘要: Compressive creep tests were performed on five commercially available acrylic bone cements under conditions simulating in vivo usage. Measured strains are quite large, generally exceeding elastic strains. Large variations response noted among the various cements, with a carbon-reinforced cement by far most resistant to creep. The empirical model epsilon = exp(b sigma)tn was found predict within about 10% of measured values. Microscopic examination some specimens after testing revealed significant cracking, resulting from long-term loading, that could be contributing cause time-dependent failure.
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