| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7169706 | Engineering Fracture Mechanics | 2015 | 17 Pages |
Abstract
Eshelby-Mori-Tanaka models with a continuum damage mechanics approach are developed to predict the elastic damage and fracture toughness of multiwalled-carbon-nanotube (MWCNT) reinforced ceramics as a function of MWCNT fraction. This damage model is introduced in a modified boundary layer modeling approach to predict damage accumulation leading to crack propagation from a pre-existing crack tip in a process window where damage and fracture are captured under plane-strain Mode I loading. The model is validated against experimental fracture toughness data for a MWCNT 3-mol% yttria-stabilized zirconia composite and successfully predicts the observed saturation in fracture toughness at about 25% volume fraction MWCNTs.
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Authors
Ba Nghiep Nguyen, Charles H. Jr.,