Slow crack growth in acrylic bone cement
- 1 September 1975
- journal article
- research article
- Published by Wiley in Journal of Biomedical Materials Research
- Vol. 9 (5) , 423-439
- https://doi.org/10.1002/jbm.820090506
Abstract
Slow crack growth in Perspex acrylic sheet (PMMA) and Simplex acrylic bone cement in air and water has been studied from a fracture mechanics viewpoint. It has been found that the crack velocity, V, for each material depends upon the intensification of stress at the tip of the crack. Experimental measurements have been made of V as a function of the stress intensity factor, K, at the crack tip, and a derived V, K relationship has been used to predict the times-to-failure of components made from PMMA and Simplex cement. Direct measurements of time-to-failure for PMMA have shown that the predicted values give a conservative estimate of the structural lifetime of the material.Keywords
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