Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Prediction of the Crack Pattern in Ceramic Composites Subjected to Temperature Variation Using Lattice Models
Submission Author:
Heloisa Zanardi , SP
Co-Authors:
Igor Paganotto Zago, Ricardo Afonso Angélico, Heloisa Zanardi
Presenter: Heloisa Zanardi
doi://10.26678/ABCM.COBEM2017.COB17-2859
Abstract
Despite its brittle mechanical behaviour, ceramic materials have excellent thermal properties for applications that demands a large temperature range, justifying the use of ceramic composites as an option for such applications. However, the interaction between the inclusion and the surrounding matrix can nucleate cracks due to the coefficients of thermal expansion mismatch. This article aims to simulate the failure of these materials under thermal loads using lattice models. The progressive failure is simulated by the introduction of a damage variable in the glass phase. Computational simulation were conducted for three volume fractions: 15\%, 30\% and 45\% vol.. The evolution of the damaged area and the crack patterns are discussed for these three volume fractions. The damaged area for the lower volume fractions tends to stay in the inclusion neighbourhood. For the higher volume fraction, a connection between interfaces can be observed.
Keywords
Ceramic Composite, lattice models, Crack propagation, Fracture Mechanics
