Failure of brittle polymers by slow crack growth
Slow crack growth in two forms of polymethylmethacrylate (PMMA) has been studied from a fracture mechanics viewpoint. It has been found that in Perspex acrylic sheet and surgical Simplex acrylic bone cement 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, KI, at the crack tip, and a derived V(K) relationship has been used to predict the times-to-failure of components made from Perspex and Simplex bone cement. Direct measurements of times-to-failure for Perspex are entirely consistent with the predicted values.
KeywordsPolymer Brittle Stress Intensity Direct Measurement PMMA
Unable to display preview. Download preview PDF.
- 1.R. P. Kambour, J. Polymer Sci. Macromol. Rev. 7 (1973) 1.Google Scholar
- 2.H. G. Nelson, A. S.Tetelman and D. P. Williams, Proceedings of the International Conference on Corrosion Fatigue, Storrs, Connecticut, June (1971).Google Scholar
- 3.S. M. Wiederhorn, J. Amer. Ceram. Soc. 50 (1967) 407.Google Scholar
- 4.A. G. Evans, J. Mater. Sci. 7 (1972) 1137.Google Scholar
- 5.J. G. Williams and G. P. Marshall, Proc. Roy. Soc., to be published.Google Scholar
- 6.G. P. Marshall, L. H. Coutts and J. G. Williams, J. Mater. Sci. 9 (1974) 1409.Google Scholar
- 7.A. G. Evans, Int. J. Fracture 9 (1973) 267.Google Scholar
- 8.H. R. Brown and I. Ward, Polymer 14 (1973) 469.Google Scholar
- 9.P. W. R. Beaumont and R. J. Young, J. Biomed. Mats. Res., to be published.Google Scholar
- 10.S. N. Zhurkov, Int. J. Fracture Mechs. 1 (1965) 311.Google Scholar
- 11.F. Bueche, “Physical Properties of Polymers”, (Interscience, New York, 1962), Ch. 11.Google Scholar
- 12.J. P. Berry, in “Fracture Processes in Polymeric Solids”, edited by B. Rosen (Interscience, New York, 1964) Ch. II.Google Scholar