Fracture toughness of CoCr alloy-PMMA cement interface

✍ Scribed by Mann, Kenneth A. ;Edidin, Avram A. ;Ordway, Nathaniel R. ;Manley, Michael T.

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 175 KB
• Volume: 38
• Category: Article
• ISSN: 0021-9304
• DOI: 10.1002/(sici)1097-4636(199723)38:3<211::aid-jbm5>3.0.co;2-s

✦ Synopsis

An unsymmetric cantilever geometry was used experimentally to determine the critical energy release rate values for cobalt chromium alloy-polymethylmethacrylate cement (CoCr alloy-PMMA) interfaces with satin finished, grit blasted, and plasma sprayed surface treatments applied to the CoCr alloy. Critical energy release rates of 0.013, 0.181, and 0.583 N/mm were found for the satin finish, grit blasted, and plasma sprayed CoCr alloy-PMMA interfaces, respectively. A finite element model of the experimental test specimen was used to determine the crack tip phase angles (08.73Њ to 027.1Њ) that indicated that the tensile load applied to the specimens resulted in a tensile (mode I) and in-plane shear (mode II) loading at the crack tip. The experimental data suggest that a satin finish CoCr alloy-PMMA interface has minimal resistance to crack propagation when compared to grit blasted or plasma sprayed surface treatments.