A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughness: II, Strength Method

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作者：

P Chantikul，GR Anstis，BR Lawn，DB Marshall

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摘要：

For pt.I see ibid., vol.64, no.9, p.533 (1981). An examination is made of the sharp-indentation technique of strength-test precracking for toughness evaluation. The experimental approach follows that proposed by other workers but the theoretical analysis contains one vital new feature; the residual-stress term discussed in Part I of this study is now introduced explicitly into the strength formulation. This modification overcomes a major systematic discrepancy evident in the previous models and at the same time, by virtue of attendant changes in the nature of the crack stability prior to attaining a failure configuration, eliminates the need for fractographic measurements

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关键词：

Theoretical or Mathematical, Experimental/ fracture toughness testing/ strength method critical evaluation indentation techniques measuring fracture toughness strength-test precracking experimental approach theoretical analysis residual-stress term crack stability failure configuration/ A6220M Fatigue, brittleness, fracture, and cracks A8170 Materials testing