Back to Search
Start Over
Design Equations for Mixed-Mode Fracture of Dental Ceramic–Cement Interfaces Using the Brazil-Nut-Sandwich Test
- Source :
- J Eng Mater Technol, Scopus, Repositório Institucional da UNESP, Universidade Estadual Paulista (UNESP), instacron:UNESP
- Publication Year :
- 2021
- Publisher :
- American Society of Mechanical Engineers, 2021.
-
Abstract
- Made available in DSpace on 2022-04-29T08:41:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-10-01 Dental interfaces are subject to mixed-mode loading. This study provides practical guidance for determining interfacial fracture toughness of dental ceramic systems. We address interfacial fracture of a composite resin cement sandwiched between two dental ceramic materials. Emphasis is placed on sandwich disc specimens with cracks originating from elliptical-shaped flaws near the center, for which analytical fracture mechanics methods fail to predict. The interaction integral method is used to provide accurate finite element solutions for cracks with elliptical-shaped flaws in a Brazil-nut-sandwich specimen. The developed model was first validated with existing experimental data and then used to evaluate the three most widely used dental ceramic systems: polycrystalline ceramics (zirconia), glass-ceramics (lithium disilicate), and feldspathic ceramics (porcelain). Contrary to disc specimens with ideal cracks, those with cracks emanating from elliptical-shaped flaws do not exhibit a monotonic increase in interfacial toughness. Also, interfacial fracture toughness is seen to have a direct relationship with the aspect ratio of elliptical-shaped flaws and an inverse relationship with the modulus ratio of the constituents. The presence of an elliptical-shaped flaw significantly changes the interfacial fracture behavior of sandwich structures. Semi-empirical design equations are provided for fracture toughness and stress intensity factors for interfacial cracks. The developed design equations provide practical guidance for determining interfacial fracture toughness of selected dental ceramic material systems. Those equations take into account four critical factors: size of the elliptical flaw, modulus ratio of constituent materials, loading angle, and applied load. Department of Civil and Environmental Engineering University of Connecticut, 261 Glenbrook Road, U-3037 Department of Dental Materials and Prosthodontics Institute of Science and Technology of Sao Jose dos Campos Sao Paulo State University (UNESP), SP Department of Preventive and Restorative Sciences School of Dental Medicine University of Pennsylvania Department of Dental Materials and Prosthodontics Institute of Science and Technology of Sao Jose dos Campos Sao Paulo State University (UNESP), SP
- Subjects :
- Materials science
their composites
interfacial fracture
metals
composite resin cements
finite element analysis
02 engineering and technology
ceramics
fracture toughness
Stress (mechanics)
Brazil-nut-sandwich test
03 medical and health sciences
0302 clinical medicine
Fracture toughness
food
0203 mechanical engineering
General Materials Science
Mixed mode fracture
intermetallics
stress intensity factors
Fracture process
Ceramic
Composite material
polymers
Cement
Mechanical Engineering
030206 dentistry
Condensed Matter Physics
Research Papers
elastic behavior
Finite element method
food.food
020303 mechanical engineering & transports
Mechanics of Materials
visual_art
mechanical behavior
visual_art.visual_art_medium
ceramic restorations
Brazil nut
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- J Eng Mater Technol, Scopus, Repositório Institucional da UNESP, Universidade Estadual Paulista (UNESP), instacron:UNESP
- Accession number :
- edsair.doi.dedup.....007ea3c1304ace5aa342b8bcee7ccace