Behaviour of glasses and polymer derived amorphous ceramics under contact stress

Zaklina Burghard
A Vickers indentation study is presented focusing on the crack opening displacement (COD) method as one new approach for fracture toughness determination. COD measurements over the entire radial indentation crack lengths enable quantitative evaluations of residual stresses at the contact site. An alternative estimation of toughness, without knowledge of the calibration parameter which is required for the indentation crack length (ICL) method, is provided by COD measurements in the vicinity of the crack tip. In...
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