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: The observed variations of mechanical and structural properties in an area between 0 and 1.5 mm below the DEJ define crown dentin as a gradient material optimized for its mechanical function.
Abstract: The mineralized tissue of intertubular dentin is a collagen-mineral composite with considerable local variations of mechanical properties. Area scans of human coronal dentin were made by complementary methods to investigate correlations between local mechanical properties and the density, size, and crystallinity of the mineral particles. Scanning images from the same specimen were collected with Fourier-transform infrared microspectroscopy in reflectance mode (FTIR-RM), small angle X-ray scattering (SAXS), quantitative backscattered electron imaging (qBEI), and Nanoindentation in an atomic force microscope. The mineral content of dentin was found to decrease and the thickness of mineral crystals to increase towards the dentin-enamel junction (DEJ). Hardness and elastic modulus both decreased towards the DEJ. In a correlation analysis, the mineral content and, even more, the thickness of mineral crystals were found as the best predictors of hardness. The dentin layer close to the DEJ corresponds to a local minimum in hardness and elastic modulus, a configuration known to be an effective obstacle for crack propagation. Hence, the observed variations of mechanical and structural properties in an area between 0 and 1.5 mm below the DEJ define crown dentin as a gradient material optimized for its mechanical function.
242 citations
TL;DR: In this paper, the magnetic field sensitive polymer gels, called ferrogels, have been studied and an equation for the uniaxial magnetoelastic properties has been derived and it was proven that at small strains the elongation is proportional to the square of steady current intensity.
Abstract: Materials producing strain in magnetic fields are known as magnetoelastic or magnetostrictive materials. A new type has been developed and the elongation of magnetic field sensitive polymer gels, called ferrogels, has been studied. The driving force of the deformation is the magnetic field gradient which was produced by an electromagnet. Unidirectional deformation measurements have been performed and the dependence of elongation on the current intensity has been reported. An equation for the uniaxial magnetoelastic properties has been derived and it was proven that at small strains the elongation is proportional to the square of steady current intensity. The elastic modulus of ferrogels was found not to be influenced by the magnetic field.
241 citations
TL;DR: The single-crystal elastic properties of synthetic pyrope and periclase (MgO) have been measured by Brillouin scattering in a diamond anvil cell (DAC) up to 20 GPa as discussed by the authors.
241 citations
TL;DR: In this article, thermal, morphological and dynamic properties of polypropylene (PP) and cellulose fiber composites were investigated and two types of CF and a compatibilizer were used.
241 citations
TL;DR: In this paper, a fine and homogeneous dispersion of VGCF throughout the SMP matrix is obtained, and it is indicated that the recovery stress of CNT/SMP nanocomposites with only 3.3% weight fraction of carbon nanotubes will reach almost twice of that in SMP bulk.
240 citations