Fatigue behavior of a pyrolytic carbon

✍ Scribed by Ma, Ling ;Sines, George

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 258 KB
• Volume: 51
• Category: Article
• ISSN: 0021-9304
• DOI: 10.1002/(sici)1097-4636(200007)51:1<61::aid-jbm9>3.0.co;2-z

✦ Synopsis

The test method introduced here enables the fatigue test of a brittle material at a stress level that is as high as its ultimate fracture strength. The procedural design of the test eliminates uncertainties that often make interpretation of the results difficult. The results, using a statistical analysis, demonstrate that isotropic pyrolytic carbons are fatigue-free in physiologically relevant stress regimes encountered in contemporary bi-leaflet artificial heart-valve designs. Verification tests show that the material can withstand cyclic stress of 10 9 cycles at a strain level that equals that of the mean static strength.