Microstructure-based modelling and experimental investigation of crack propagation in glass–alumina functionally graded materials

作者: V. Cannillo , T. Manfredini , M. Montorsi , C. Siligardi , A. Sola

DOI: 10.1016/J.JEURCERAMSOC.2005.10.003

关键词: Fracture mechanicsFracture (geology)Microscale chemistryForensic engineeringThermal expansionWork (thermodynamics)Combined approachComposite materialMaterials scienceMicrostructureScanning electron microscopeMaterials ChemistryCeramics and Composites

摘要: Abstract The aim of the present work was determination fracture mechanisms in glass–alumina functionally graded materials (FGMs). investigation performed by means a combined approach based on microscale computational simulations, which provided for an accurate modelling actual FGM microstructure, and experimental analysis. numerical results proved that microstructural defects, such as pores, deeply influenced damage evolution. On contrary, minimization mismatch coefficients thermal expansion ingredient allowed to obtain low residual stresses, did not relevantly affect crack propagation. In order support model, microindentation tests were cross-section specimens experimentally observed paths compared computationally predicted ones.

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