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Slow crack growth in acrylic bone cement

✍ Scribed by Beaumont, Peter W. R. ;Young, Robert J.

Publisher: John Wiley and Sons
Year: 1975
Tongue: English
Weight: 737 KB
Volume: 9
Category: Article
ISSN: 0021-9304
DOI: 10.1002/jbm.820090506

No coin nor oath required. For personal study only.

✦ Synopsis

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.

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