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 39 for “"Master curves"”.
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Two-layer master curves for electromagnetic sounding
Includes bibliographical references (pages 69-70).
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The modelling of processing conditions for polypropylene-nanoclay integral hinges at high heat exposure
… generate the regression models and to construct master curves for quality performance prediction based on nanoclay content. According to the results, 18 regression models have been successfully generated. 3 types of master curves have been constructed based on the produced models with the …
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Long-term creep modeling of wood using time temperature superposition principle
Long-term creep and recovery models (master curves) were developed from short-term data using the time temperature superposition principle (TTSP) for kiln-dried southern pine loaded in compression parallel-to-grain and exposed to constant environmental conditions (~70°F, ~9%EMC). Short-term …
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The time-temperature behavior of graphite epoxy laminates
… whenever possible. At elevated temperatures, master curves of matrix dominated unidirectional laminates are obtained using the time-temperature superposition principle. Using the principal properties (E₁₁, E₂₂(t), G₁₂(t) and v₁₂), master curves of other off-axis laminates reduced at any …
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Modeling of the linear viscoelastic response of polymer modified asphalt binders at intermediate and high temperatures
… of the resulting isothermal response curves indicated that simple time-temperature superposition is applicable, and dynamic master curves can be constructed by empirical superposition. Effects of polymer type, polymer content, and aging treatment on the behavior of dynamic master …
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Hveem Mix Design and Engineering Properties of Cold In-Place Recycling Mixtures
… mixtures, c) determine the dynamic modulus (E*) master curves of CIR mixtures, d) evaluate the resistance to permanent deformation of CIR mixtures, and e) conduct a mechanistic-empirical analysis of rutting performance to determine layer coefficients for CIR mixtures.CIR mix designs were …
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Examination of the Aging Properties of Novel Cyanate Ester Thermosets and the Subsequent Evaluation of the Material under Application Conditions
… cured resin and a family of isothermal modulus curves was established. These data were then shifted, following WLF theory, to create a master curve of storage modulus with respect to measurement frequency. The resultant master curves allowed the prediction of long term mechanical behavior of the …
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Investigation on the Mechanisms of Elastomechanical Behavior of Resilin
… Finally, doubly shifted dynamic moduli master curves are developed by applying the time-temperature concentration superposition principle (TTCSP), and compared to results obtained with natural resilin from locusts, dragonflies and cockroaches. The resulting master curves show that the …
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Viscoelastic Modeling of Straight and Modified Binders at Intermediate and High Temperatures
… Principle was used to construct the master curves. The shift factors were determined based on the complex shear modulus master curves and verified for the phase angle, storage shear modulus and loss shear modulus. After construction of the master curves, non-linear regression was used …
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Investigation of Waterborne Epoxies for E-Glass Composites
… analysis (DMA) was then used to create master curves of the storage modulus (E') in the frequency domain. The frequency range of the master curves and resulting cooperativity plots clearly varied depending on the surface treatment of the glass fibers. It was determined that the …
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Characterization and Lifetime Performance Modeling of Acrylic Foam Tape for Structural Glazing Applications
… the time temperature superposition principle, master curves of VHB tape storage and loss moduli in shear and tension were developed with data from a dynamic mechanical analyzer (DMA). The thermal shift factors obtained from these constitutive tests were successfully applied to the creep rupture …
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Linear and Nonlinear Viscoelastic Characterization of Proton Exchange Membranes and Stress Modeling for Fuel Cell Applications
… was characterized over a period of time. Hygral master curves were constructed noting hygral shift factors, followed by thermal shifts to construct a hygrothermal master curve. This process was reversed (thermal shifts followed by hygral shifts) and was seen to yield a similar hygrothermal master …
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Performance Evaluation of Asphalt Mixtures with Tire Rubber Modified Binder
… was evaluated by means of dynamic modulus master curves, fatigue cracking, permanent deformation, and reflective cracking resistance. Dynamic modulus tests were conducted using the Asphalt Mixture Performance Tester (AMPT) device and the master curves were built using AASHTO R84 standard …
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Exploring the Black Space of Compressive and Shear Modulus
… with the standard analysis generating a Master Curve. One alternative to the master curve approach is a Black Space diagram, which is a rheological plot that can delineate either dynamic modulus |E*| or shear modulus |G*| vs. phase angle (δ). In this study, four asphalt binders were …
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Model development and validation of bituminous-based crack sealants
… of these aging methods. Comparing the stiffness master curves obtained from the crack sealant bending beam rheometer (CSBBR) test for field-aged samples and laboratory-aged samples, VOA was validated as a reasonable aging method for simulating two-five years of field aging. Finally, sealant …
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Viscoelastic characterization of angle ply advanced composites
… response surfaces for significant variables. Master curves using the time-temperature superposition principle were established for individual tests. Mechanical model representation, integral equation formulation and numerical integration methods based on linear viscoelasticity were used to …
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Prediction of Linear Viscoelastic Response of the Loss Shear Modulus of Polymer-Modified Binders
… 0.06 to 0188.5 rad/s, were reduced to dynamic master curves of moduli, and used to develop the model. Twenty-one polymer-binder blends prepared and tested earlier at Virginia Tech where included in the study. Realistic characterization of loss shear moduli values was obtained using the Gompertz …
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Development of an alternative test to obtain asphalt mixture creep compliance at low temperatures
… geometry. The power-law model was fitted to the master compliance curves to calculate the m-value and the master curves were compared to the master curve obtained from the IDT creep compliance test.
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Analysis and Modeling of the Mechanical Durability of Proton Exchange Membranes Using Pressure-Loaded Blister Tests
… biaxial burst strength values. Biaxial strength master curves are constructed using traditional time-temperature superposition principle techniques and the associated temperature shift factors show good agreement when compared with shifts obtained from other modes of testing on the material. …
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Design and Qualification of a Test Fixture to Experimentally Determine Global Tire Force Properties
… data, which is partially ill- conditioned, onto master curves that consistently display the effect of inclination angle and tire inflation pressure on tire response.
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