Modeling residual stresses in composite materials

Shokrieh, M.M.; Shahri, S. Masoud Kamali

doi:10.1533/9780857098597.1.173

Cited by 53 publications

(41 citation statements)

References 40 publications

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“…[88][89][90][91][92][93] The addition of 38.16 micro-sized Nb 2 O 5 particles to dental adhesive resin with loadings of 5, 10 and 20 wt% significantly increased hardness at 20 wt%, followed by 10 wt%. 94 Vojdani et al incorporated Al 2 O 3 with an average particle size of 3 µm into PMMA denture base; they noted that hardness significantly increased at 2.5 wt% and 5 wt%, followed by 0.5 wt% and 1 wt%.…”

Section: The Effect Of Particle Size On Hardnessmentioning

confidence: 99%

Effects of Filler Size on the Mechanical Properties of Polymer-filled Dental Composites: A Review of Recent Developments

Kundie

Azhari²,

Muchtar³

et al. 2018

JPS

130

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Section: The Effect Of Particle Size On Hardnessmentioning

confidence: 99%

Effects of Filler Size on the Mechanical Properties of Polymer-filled Dental Composites: A Review of Recent Developments

Kundie

Azhari²,

Muchtar³

et al. 2018

JPS

130

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“…This may be attribute to increasing the surface area of the Nano fillers in contact with dental composite and decreasing the movement of polymer molecular which lead to reduce the strength of material. The existence of particles of filler in resin matrix improves some mechanical characteristics, like hardness [62,63], adding Nanoparticles to dental composite resin with (1.33 to 6.6) wt% loadings considerably enhances hardness at 1.33 wt%, followed by (6.6wt)%. [64].…”

Section: Hardnessmentioning

confidence: 99%

Synthesis and characterization of novel nanocomposites with nanofillers particles and their applications as dental materials

Mutar¹,

Mahdi²

2019

PEN

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Using copolymers materials in the preparation of dental fillings is now more common as a result for needs for more esthetic materials of filling and the international ban on the use of products that contain mercury, amongst others dental amalgams. On the other hand, a disadvantage with the Dental Nanocomposites is that they have a polymerization shrinkage. Particles of the filler are combined in the amongst other components for shrinkage minimization. Filler particle sizes have decreased lately and the majority of Dental Nanocomposites include Nano-particles. New Nanocomposites materials based on 2,2 propyl bisphenyl glycidyldimethacrylate (Bis-GMA) and unsaturated monomers (Methacrylic acid,Acrylicacid,2,2propylbisphenylglycidyldimethacrylate,Triethyleneglycoldimethacrylate) with Nano inorganic fillers such as (SiO 2 ,ZrO 2 and Hydroxyapatite) were characterized and synthesized for the sake of evaluating the potential applications they have in the field of dentistry, as restoration materials. The initial method was generating and characterizing new dental Nano-composites in presence of Triethylene glycol dimethacrylate (TEGDMA) as crosslinking agent. Composites which contain Bis-GMA and Triethylen glycoldimethacrylate) at the ratio (wt/wt) of 40/20, filled with various Nanofiller amounts (about 4.6%wt) were produced. Photo-polymerization has been induced with camphoroquinone / N,N-dimethylaminoethyl methacrylate(CQ/DMAEMA) present, as a system of photo-initiation. Physicochemical properties, such as volumetric shrinkage (VS), water sorption (WS) and water solubility (WSL) were studied. Characterization is performed with the use of SEM and FTIR spectrum. SEM is utilized for showing the distributions of particle sizes and particle agglomeration of the treated Nanofillers in Nanocomposite. FTIR spectroscopy is initially utilized for identifying qualitative construction of the Nanocomposites. The Thermal stability of all dental Nanocomposites were also studied using the TGA and DSC techniques. The strength and the aesthetic characteristics of resin based Nanocomposite open the possibility of using it for each of the posterior and anterior restorations. Flexural strength, compressive strength, wear resistance and hardness were evaluated. The presented research has the aim of addressing current key utilizations of the practical Nanotechnology in the field of dentistry, most importantly, tooth structure restoration with Resin-based composites (RBCs) which benefit from the Nanoparticles.

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“…These lamination residual stresses, acting exclusively in the plane of the laminate, are superimposed to the micro-residual stresses and are bound to influence the bundle pull-out behaviour. The macro-residual stresses in the laminated coupons of both materials can be calculated by means of Classical Lamination Theory (CLT), as presented in [38], using the homogenized ply properties available in [10,11,30].…”

Section: Correlation Between Intralaminar and Translaminar Failure Mementioning

confidence: 99%

Relations between intralaminar micromechanisms and translaminar fracture behavior of unidirectional FRP supported by experimental micromechanics

Haldar

Herráez

Naya

et al. 2019

Composites Part B: Engineering

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The translaminar fracture behaviors of partially different unidirectional composite systems, constituted by the same carbon fibers but different (thermoset vs. thermoplastic) matrices, were characterized by means of compact tension fracture tests. The resulting crack resistance curves (R-curves) and fracture surfaces, were studied in detail and found to be rather different between those material systems, in spite of the same reinforcing fibers at similar volume fractions. In the attempt to justify this difference, the effects of the underlying micromechanisms were evaluated by employing experimental micromechanical measurements of the fracture characteristics of fibers, matrices and fiber/matrix interfaces. By means of a thorough analysis and quantification of the micromechanisms that contribute to the work of fracture, it was possible to decompose the translaminar fracture toughness of the composites into different contributions. Independently of the material considered, fibre bundle pull-out was found to be the mechanism that dissipates the highest amount of energy. Different patterns of bundle pull-out in different material systems were found to be the result of different outcomes from the competition of fracture micromechanims, and to be responsible for the differences between the translaminar fracture energies of both material systems. Moreover, it was realized that the energy dissipated in bundle pull-out, hence also the overall measured translaminar fracture toughness are strongly governed by in-situ effects, i.e. effects of specimen lamination features.

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Modeling residual stresses in composite materials

Cited by 53 publications

References 40 publications

Effects of Filler Size on the Mechanical Properties of Polymer-filled Dental Composites: A Review of Recent Developments

Effects of Filler Size on the Mechanical Properties of Polymer-filled Dental Composites: A Review of Recent Developments

Synthesis and characterization of novel nanocomposites with nanofillers particles and their applications as dental materials

Relations between intralaminar micromechanisms and translaminar fracture behavior of unidirectional FRP supported by experimental micromechanics

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