Lifetime-predictions of a glass-ceramic with machined flaws
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A dynamic fatigue study was performed on a Li2O-Al2O3-SiO2 glass ceramic to assess its susceptibility to delayed failure and to compare the results with those from a previous study. Fracture mechanics techniques were used to analyse the results for the purpose of making lifetime predictions. The material strength and lifetime was seen to increase due to the removal of residual stress through grinding and polishing. Influence on time-to-failure is addressed for the case with and without residual stress present.
KeywordsPolymer Fatigue Residual Stress Fracture Mechanic Material Processing
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