Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 162 for “"viscoelastic properties"”.
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Viscoelastic properties of chitosan
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nutrition and Food Science, 1983.
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Dynamic viscoelastic properties of advanced magnetic tapes
<p>The purpose of this thesis is to analyze the viscoelastic properties of current large digital storage magnetic tape materials, using a custom ultra-low frequency dynamic mechanical analyzer (DMA). Through the correlated effects of frequency and temperature, the long term mechanical properties of …
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Viscoelastic Properties of Polymer Composites During Processing
In this work several aspects of the curing, viscoelastic, and cure shrinkage behavior of an aerospace grade epoxy resin were characterized and modeled for the purpose of composites process modeling. Measurement of matrix viscoelastic properties during cure was accomplished through two experimental …
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Soft tissue viscoelastic properties: measurements, models and interpretation
The quantification of mechanical properties of soft tissues has been of great interest for more than two decades because they have the potential of being used as biomarkers for disease diagnosis. Indentation techniques, the most recognized techniques for characterizing mechanical properties, are …
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Investigating Cell Viscoelastic Properties with Nanonet Force Microscopy
Determining the mechanical properties of living cells accurately and repeatably is critical to understanding developmental, disease, and repair biology. The cellular environment is composed of fibrous proteins of a mix of diameters organized in random and aligned configurations. In the past two …
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Development of Methods for Characterizing Ankle Ligament Viscoelastic Properties
… work is to develop methods for determining the viscoelastic properties of ankle ligaments. The tibiocalcaneal ligament was used for the method development and for the preliminary mechanical testing presented in this work. This document focuses primarily on the development of several novel …
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Experimental Study on Viscoelastic Properties and Fracture Characteristics in Polymers
… following objectives:<br />1. To determine the viscoelastic properties of polymers on creep test under constant load;<br />2. To determine the internal friction (loss factor) of polymers under periodic loading condition;<br />3. To determine the delayed time or life time on fracture of the …
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Studies on the hydro-thermal and viscoelastic properties of leather
The temperature dependent viscoelastic behaviour of synthetic polymers has been shown to be of high importance for their properties and applications. However for leather this aspect of viscoelasticity has not been studied. In order to further the understanding of structure-property relationships, …
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Experimental determination of the viscoelastic properties of the human fingerpad
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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Methods to measure and relate the viscoelastic properties of brain tissue
Measurement of brain tissue elastic and viscoelastic properties is of interest for modeling traumatic brain injury, understanding and creating new biomarkers for brain diseases, improving neurosurgery procedures and development of tissue surrogate materials for evaluating protective strategies …
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Modeling of the Aging Viscoelastic Properties of Cement Paste Using Computational Methods
… paste has always been a difficulty. In the past, viscoelastic behavior of cementitious materials has been primarily attributed to the viscoelastic properties of C-S-H components. Recent experimental results show that C-S-H may not exhibit as much creep and relaxation as previously thought. This …
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Integrating novel rheological tools with microscopy to characterize viscoelastic properties of complex materials
… stress or deformation. Characterizing these properties is essential because it can help in optimizing the formulation and processing of the materials. Over the years, different rheological techniques have evolved, however, with the growth of science and technology, the realm of material …
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Investigation of the analogies between viscometric and linear viscoelastic properties of polystyrene fluids
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1979.
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Modification of crumb rubber cement interface and its effect on strength and viscoelastic properties
Due to an increasing amount of waste tires being produced yearly, environmental concerns arise as waste tires in landfills pose both a fire hazard, and a habitat for rodents and mosquitos. As a result, the reuse of waste tires in the form of crumb rubber in concrete has been attempted. Previous …
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Deciphering how the viscoelastic properties of mussel-inspired metal-coordinate hydrogels dictate their adhesive and interfacial mechanics
In the world of adhesives, tunable viscoelasticity and adhesion to wet surfaces are two highly desirable properties. Mussels have already mastered both of these properties within the threads they create to anchor themselves in harsh intertidal conditions (collectively called the byssus). The key to …
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Investigation of Processing Conditions and Viscoelastic Properties on Frictional Sliding Behavior of Unidirectional Carbon Fiber Epoxy Prepreg
… pressures, temperatures and sliding velocities. Viscoelastic properties such as the complex viscosity (η*), storage modulus (G'), loss modulus (G"), and loss factor (tan δ) were used to determine the critical transition events (such as gelation) during cure. An understanding of changes in …
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Nanoporous glass-ceramics transparent in infrared range to be used as optical sensor-Mechanical and viscoelastic properties of the TAS (Te-As-Se) glass
… environment, etc), exhibits poor mechanical properties rapidly that enable it to be used. Its mechanical properties have been investigated as a function of time and environment. From a general observation, air and vacuum have dramatic effects on TAS fibers tensile strength. When ageing under …
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Measuring and Modeling the Time-Dependent Response of Cementitious Materials to Internal Stresses
… shrinkage of cement paste is considered as a viscoelastic response to internally applied stresses. In addition, concrete shrinkage is modeled from a composite approach considering the viscoelastic properties of the cement paste matrix and the complex paste-aggregate interaction that results in …
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Properties of elastomers for small-joint replacements
… There is a lack of literature on the mechanical properties of silicones. The aim of this thesis was to investigate the viscoelastic and related properties of elastomers such as silicones and polyurethanes (suggested as a possible substitute for silicones in the implants) and to relate the …
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