Numerical modelling of two-phase ceramic composite response under uniaxial loading
Artykuł w czasopiśmie
MNiSW
35
Lista A
| Status: | |
| Autorzy: | Sadowski Tomasz, Pankowski Błażej |
| Rok wydania: | 2016 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 143 |
| Strony: | 388 - 394 |
| Web of Science® Times Cited: | 49 |
| Scopus® Cytowania: | 57 |
| Bazy: | Web of Science | Scopus | Web of Science Core Collction |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| Two-phase ceramic composites (e.g. Al2O3 + ZrO2 – Zirconia-toughened Alumina (Birman and Byrd, 2000; Sadowski, 2012, 2011)), due to their extremely high strength and increasing toughness are widely used nowadays in various industries, e.g. (Sadowski and Golewski, 2012; Sadowski, 2008; Sadowski and Golewski, 2011). At the macroscale, the main dissipative mechanism is brittle cracking, that can be faithfully modelled within the framework of classical Linear Elastic Fracture Mechanics (LFEM). However, many essential properties, such as fracture toughness, depend on microstructural phenomena, related to grain size, orientation, residual stresses and various toughening mechanisms, that are intentionally introduced into the microstructure. Thus, a good understanding of these processes is the most important tool for a fully conscious design of these advanced materials, from manufacturing to the end of structural lifetime. In this paper, a basic framework with a numerical example for two-dimensional micromechanical analysis of multiphase brittle composites is described, using two radically different theoretical and numerical approaches: continuum mechanics with cohesive-type cracks, completely discrete (peridynamical) theory. One can conclude that simplified FE models can’t reflect mechanical response of complex systems with cracks in a quantitative way. Peridynamics, despite its numerical inefficiency, seems to be a powerful tool for both static and dynamic crack propagation problems in heterogenous materials under thermomechanical loading |
