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 process outlined herein provides a convenient, non-toxic,non-denaturing approach for the generation collagen-containing nanofibers and non-woven fabrics that have potential application in wound healing, tissue engineering, and as hemostatic agents.
Abstract: Type I collagen-PEO fibers and non-woven fiber networks were produced by the electrospinning of a weak acid solution of purified collagen at ambient temperature and pressure. As determined by high-resolution SEM and TEM, fiber morphology was influenced by solution viscosity, conductivity, and flow rate. Uniform fibers with a diameter range of 100-150 nm were produced from a 2-wt% solution of collagen-PEO at a flow rate of 100 μl min-1. Ultimate tensile strength and elastic modulus of the resulting non-woven fabrics was dependent upon the chosen weight ratio of the collagen-PEO blend. 1H NMR dipolar magnetization transfer analysis suggested that the superior mechanical properties, observed for collagen-PEO blends of weight ratio 1 : 1, were due to the maximization of intermolecular interactions between the PEO and collagen components. The process outlined herein provides a convenient, non-toxic, non-denaturing approach for the generation collagen-containing nanofibers and non-woven fabrics that have potent...
520 citations
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06 Jul 2001
TL;DR: In this article, the effects of temperature and frequency on complex modulus properties of Viscoelastic Materials are investigated. But the authors focus on the effect of temperature on complex modulation properties and do not consider the effect on the properties of simple Viscoellastic systems.
Abstract: Preface. Introduction to Damping. Modeling the Dynamic Mechanical Behaviour of Viscoelastic Materials. The Effects of Temperature and Frequency on Complex Modulus Properties. Measurement of Complex Modulus Properties. Numerical Analysis of Measured Complex Modulus Data. The Complex Modulus Behaviour of Typical Polymeric Materials. Harmonic and Non-harmonic Response of Simple Viscoelastic Systems. Controlling Vibration using Viscoelastic Materials. References. Symbols for Chapter 8. Selected Computer Programmes. Units and Dimensions. Author Index. Subject Index.
520 citations
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TL;DR: In this paper, the authors examined the work done during indentation using dimensional analysis and finite element calculations for conical indentation in elastic-plastic solids with work hardening, and proposed a method for estimating the hardness and modulus of solids using instrumented indentation with conical or pyramidal indenters.
Abstract: The work done during indentation is examined using dimensional analysis and finite element calculations for conical indentation in elastic-plastic solids with work hardening. An approximate relationship between the ratio of hardness to elastic modulus and the ratio of irreversible work to total work in indentation is found. Consequently, the ratio of hardness to elastic modulus may be obtained directly from measuring the work of indentation. Together with a well-known relationship between elastic modulus, initial unloading slope, and contact area, a new method is then suggested for estimating the hardness and modulus of solids using instrumented indentation with conical or pyramidal indenters.
518 citations
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TL;DR: In this article, the authors used micro-Raman spectroscopy to monitor the cooling-induced compressive deformation of carbon nanotubes embedded in an epoxy matrix, and derived the Young's modulus of single and multi-wall carbon nano-tubes from a concentric cylinder model for thermal stresses.
Abstract: Micro-Raman spectroscopy is used to monitor the cooling-induced compressive deformation of carbon nanotubes embedded in an epoxy matrix. Young’s modulus of single- and multiwall nanotubes may then be derived from a concentric cylinder model for thermal stresses, using the D*-band shift for each tube type. The resulting values of the elastic moduli are in very good agreement with predicted theoretical values, and with the published experimental data set of Treacy et al., Nature (London) 381, 678 (1996).
517 citations
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TL;DR: In this article, the elastic behavior of multi-walled carbon nanotubes (MWCNTs) is investigated and the authors show that the Young's moduli and shear moduli of MWCNTs are in the ranges of 1.05±0.05 and 0.40±0.05 TPa, respectively.
517 citations