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 physical properties of single, 5-8-μm diameter, water-swollen elastin fibers have been investigated on a micro test apparatus attached to a polarizing microscope as discussed by the authors.
Abstract: The physical properties of single, 5–8-μm diameter, water-swollen elastin fibers have been investigated on a microtest apparatus attached to a polarizing microscope. Analysis of the mechanical and optical properties at extensions below 100% indicate that the elastic modulus (G) has a value of 4.1 × 105 N m−2, the average molecular weight of chains between crosslinks is in the range of 6000–7100, and the stress optical coefficient (C′) is 1 × 10−9 m2 N−1 at 24°C. Analysis of the temperature dependence of the stress optical coefficient indicates that the polarizability of the random link decreases with increasing temperature, with an apparent activation energy for this process of the order of 1.6 kcal/mol. Analysis of the non-Gaussian mechanical and optical properties at extensions above about 100% suggest that the chains between crosslinks contain approximately 10 “effective” random links, with each link consisting of 7–8 amino acid residues. These parameters for the random chains in the elastin network have been used to predict the dimensions of other random proteins. The close correlation of these predictions with published values for the dimensions of a series of proteins in solution in 6M guanidinium hydrochloride provides an independent test of the appropriateness of our analysis.
191 citations
TL;DR: In this article, a new kind of differential effective medium theory (D-EMT) is proposed to address this problem, where each inclusion particle, surrounded by a shell of another phase, is mapped onto an effective particle of uniform elastic moduli.
191 citations
TL;DR: In conclusion, prism-sheath structure played an important role in determining the mechanical properties as well as the localized fracture of enamel.
190 citations
Journal Article•
TL;DR: This in vitro study evaluated the fracture resistance of all-ceramic crowns as a function of the elastic moduli of the supporting die and found the fracture load increased markedly with the increase in elastic modulus.
Abstract: This in vitro study evaluated the fracture resistance of all-ceramic crowns as a function of the elastic modulus of the supporting die. All-ceramic crowns were made for dies with three different elastic moduli and two different crown lengths. The occlusal surface was loaded in compression with a 12.7-mm steel ball. The fracture load increased markedly with the increase in elastic modulus. The largest increase was seen when only the occlusal surface of the crown was covered. The characteristic fracture load of the complete-crown restorations was more than double that of the occlusal-cover restorations in the dies with the lowest modulus of elasticity, while for the dies with the highest modulus of elasticity the difference in the characteristic fracture load for the two configurations was not significant.
190 citations
TL;DR: In this paper, the effective elastic moduli for low-density transversely isotropic medium were derived for both open cell and closed cell geometric models in the case of isotropics.
Abstract: Mechanics analyses are used to derive the effective elastic moduli for low density materials. Both open cell and closed cell geometric models are employed in the case of isotropic media. The five independent effective moduli are derived for a low density transversely isotropic medium. Compressive strength, as defined by elastic stability, is also derived for open cell and closed cell isotropic materials. The theoretical results are compared with some experimental results, and also are assessed with respect to previous work.
190 citations