Topic
Elastic modulus
About: Elastic modulus is a research topic. Over the lifetime, 33153 publications have been published within this topic receiving 810247 citations.
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TL;DR: In this paper, the effect of surface energy on the effective elastic properties was analyzed for elastic composite materials containing spherical nanocavities at dilute concentration, and closed-form solutions of the effective shear modulus and bulk modulus were obtained.
Abstract: The effect of surface energy on the effective elastic properties was analyzed for elastic composite materials containing spherical nanocavities at dilute concentration. Closed-form solutions of the effective shear modulus and bulk modulus were obtained, which turn out to be a function of the surface energy and size of the nanocavity. The dependence of the elastic response on size of the nanocavity in composite materials is different from the classic results obtained in the linear elasticity theory, suggesting the importance of the surface energy of the nanocavity in analyzing the deformation of nanoscale structures.
176 citations
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TL;DR: In this paper, the elastic modulus (E), flexural strength (MOR), and Vickers hardness (H v ) increase with the amount of carbon in the oxycarbide glasses reaching the maximum values (E≃115 GPa, MOR≃550 MPa, and H v ≃9 GPa).
Abstract: Silicon oxycarbide glasses have been fabricated, in the shape of thin rods suitable for flexural test experiments, by pyrolysis in an inert atmosphere at 1000 and 1200°C of sol-gel precursors containing Si-CH 3 and Si-H bonds The amount of carbon in the silicon oxycarbide network has been controlled by varying the carbon load in the precursor gel Density and surface area analysis revealed that all of the samples pyrolyzed at 1200°C were well-densified silicon oxycarbide glasses whereas for the glasses treated at 1000°C, compositions with low carbon loads showed the presence of a residual fine porous phase The elastic modulus (E), flexural strength (MOR), and Vickers hardness (H v ) increase markedly with the amount of carbon in the oxycarbide glasses reaching the maximum values (E≃115 GPa, MOR≃550 MPa, and H v ≃9 GPa) for samples with the highest carbon content The experimental elastic modulus values of the silicon oxycarbide glasses compare well with the theoretical estimations obtained using the Voigt and Reuss models assuming the disordered network formed by the corresponding thermodynamic compositions
176 citations
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TL;DR: In this article, the authors performed tensile tests on a PSF Al-Si alloy reinforced with multiwalled carbon nanotubes (MWCNTs) and found that the addition of CNTs leads to a 78% increase in the elastic modulus of the composite.
Abstract: Uniaxial tensile tests were performed on plasma spray formed (PSF) Al–Si alloy reinforced with multiwalled carbon nanotubes (MWCNTs). The addition of CNTs leads to 78% increase in the elastic modulus of the composite. There was a marginal increase in the tensile strength of CNT reinforced composite with degradation in strain to failure by 46%. The computed critical pullout length of CNTs ranges from 2.1 to 19.7 μm which is higher than the experimental length of CNT, leading to relatively poor load transfer and low tensile strength of PSF nanocomposites. Fracture surface validates that tensile fracture is governed strongly by the constitutive hierarchical microstructure of the plasma sprayed Al–CNT nanocomposite. The fracture path in Al–CNT nanocomposite occurs in Al–Si matrix adjacent to SiC layer on CNT surface.
176 citations
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01 Jan 2009TL;DR: General properties of hydrogels formed by free-radical cross-linking copolymerization of vinyl/divinyl monomers in aqueous solutions are described.
Abstract: In the application areas of polymer hydrogels, precise information on their molecular constitution as well as their elastic properties is required. Several interesting molecular features control the elastic properties of the hydrogels. In this chapter, we describe general properties of hydrogels formed by free-radical cross-linking copolymerization of vinyl/divinyl monomers in aqueous solutions. Special attention is paid to the relationships between the formation conditions of hydrogels and their properties such as swelling behaviour, elastic modulus, and spatial inhomogeneity. New developments achieved in the design of hydrogels with a good mechanical performance and a fast response rate is also presented.
176 citations
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TL;DR: Evaluating the mechanical properties of strong porous scaffolds of silicate 13-93 bioactive glass fabricated by robocasting provided critically needed data for designing bioactiveGlass scaffolds and the results are promising for the application of these strong pores in loaded bone repair.
176 citations