Analysis of Fracture and Toughness of a Denture Base with Polyvinyl Fibers
Open Access
- 28 February 2022
- journal article
- Published by Lattice Science Publication (LSP) in International Journal of Advanced Pharmaceutical Sciences and Research
- Vol. 2 (2), 1-4
- https://doi.org/10.54105/ijapsr.b4004.022222
Abstract
Fracture resistance of polymer reinforced with short fibers consists of a sum of contributions from matrix and fiber fracture, fiber de-bonding and pull-out. The existing models for predicting dependence of fracture toughness on structural variables were derived for the commercially important fiber volume fractions, i.e., for vf≥0.1. In this contribution, modification of the existing model for the dependence of the critical strain energy release rate, GIC, on the fiber type, length and aspect ratio, interfacial adhesion and volume fraction has been attempted to allow predictions at low vf < 0.10. The predictions based on the modified model were compared with experimental data on fracture toughness of lightly x-linked PMMA used to manufacture base of removable dentures toughened with short randomly oriented deformable fibers. The composite toughness was measured under impact loading to simulate typical mode of fracture of removable dentures. The GIC for composites containing short Kevlar 29, S2-glass and poly(vinyl alcohol) (PVOH) fibers were obtained using instrumented Charpy impact tests at room temperature and impact speed of 1.0 m/s. Theoretical prediction based on the proposed model and experimental results agreed reasonably well.Keywords
This publication has 16 references indexed in Scilit:
- Toughening of denture base resin with short deformable fibersComposites Science and Technology, 2009
- Microdeformation mechanisms in rubber toughened PMMA and PMMA-based copolymersEngineering Fracture Mechanics, 2006
- Reinforcement of poly(methyl methacrylate) denture base with glass flakeDental Materials, 2005
- Dynamic and static moduli of elasticity of resin-based materialsDental Materials, 2002
- The effect of rubber particle size on toughening behaviour of rubber-modified poly(methyl methacrylate) with different test methodsPolymer, 1998
- Impact strength of acrylic resin denture base materials with surface defectsDental Materials, 1993
- Ternary composites of polypropylene/elastomer/calcium carbonate: effect of functionalized components on phase structure and mechanical propertiesPolymer, 1992
- The role of inherent ductility in rubber toughening of brittle polymersPolymer, 1991
- Effect of short fibre reinforcement on the fatigue crack propagation and fracture of PEEK-matrix compositesComposites, 1986
- Microstructural efficiency and fracture toughness of short fiber/thermoplastic matrix compositesComposites Science and Technology, 1985