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 18 of 18 for “"CREEP-RECOVERY"”.
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Compliance, relaxation and creep recovery of normal strength concrete.
… properties of concrete are shrinkage and creep of concrete. At relative humidities less than 96--99% concrete shrinks. For concrete, creep is the deformation under load after having subtracted the shrinkage and elastic deformation. For specimens loaded in a drying environment there is …
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Correlation between multiple stress creep recovery (MSCR) results and polymer modification of binder
… Federal Highway Administration, Multiple Stress Creep Compliance (MSCR), offers a simpler procedure using the Dynamic Shear Rheometer (DSR), thus it does not require the expense of purchase additional testing equipment. The objective of this study is to determine the feasibility of using MSCR as …
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Evaluation of Spring Wheat Genotypes for Nutritional and Bread-making Quality
… variables and, iii) to study relationships of creep and creep-recovery with other rheological properties. Variability in Phenolic compounds was greater in spring wheat genotypes and heritability estimates were moderate. It appears that focused breeding efforts could successfully increase wheat …
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The nonlinear viscoelastic behavior of adhesives and chopped fiber composites
… adhesive (Metlbond 1113-2) as determined by creep and creep recovery tests is presented. A nonlinear viscoelastic characterization method of Schapery is presented and applied to the data for both materials. The nonlinear constitutive equation so obtained is used together with a delayed …
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Accelerated viscoelastic characterization of T300/5208 graphite- epoxy laminates
… The transient component of the viscoelastic creep compliance is assumed to follow a power law approximation. A recursive relationship is developed, based upon the Schapery single-integral equation, which allows approximation of a continuous time-varying uniaxial load using discrete steps in …
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The creep and creep rupture of SMC-R50 under different thermomechanical conditions
The creep and creep recovery behavior of a random fiber composite (SMC-R50) at elevated temperature and constant humidity were investigated experimentally and theoretically. The short time creep response for four constant stress levels at each of four selected temperature levels was experimentally …
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Development and validation of a novel testing procedure for the evaluation of rutting susceptibility of bituminous binders.
… them to a new protocol combining Single Creep-Recovery (SCR) tests with Multiple Stress Creep (MSC) tests on DSR. Low shear viscosity (LSV) and Multiple Stress Creep Recovery (MSCR) tests were also performed for comparison purposes. LSV and MSCR tests are currently known as standard …
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The rheological properties of aqueous polyacrylamide solutions
… they have been widely used in enhanced oil recovery. In this thesis, an experimental work has been carried out to provide a complete and comprehensive study of the rheological properties of polyacrylamide solutions using cone-and-plate rheometery. Polyacrylamide concentrations in the tested …
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A viscous-viscoelastic creep model
The creep data of 304 stainless steel at 1100 °F (593 °C) for pure tension, pure torsion, and combined tension and torsion under varying stress history were analyzed. The variable stresses are step changes in stress including complete unloading, reloading, step-up, step-down, and side steps in …
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Characterisation of lead-free solder pastes and their correlation with the stencil printing process performance
… flux and particle size distribution (PSD) on the creep recovery performance of lead-free solder pastes used for flip-chip assembly. For this study, a novel technique was calculating the extent of paste recovery and hence characterising the slumping tendency in solder pastes. The second part of the …
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Structural integrity assessment of engineering components under cyclic loading at high temperature
… but cause severe structural problems due to creep, fatigue, creep-fatigue failure mechanisms. Hence, performing structural integrity assessment accurately and developing effective assessment methods are vital tasks in these industries.;In order to contribute to the research field of the high …
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Improving Texture and Flavor of Reduced-Fat Cheddar Cheese Using an Exopolysaccharide-Producing Culture and Ultrafiltration
… decreased in the EPS-negative one. At day 1, the creep/recovery test showed that EPS-positive cheese was less rigid and more deformable than EPS-negative cheese. Lower (P≤0.05) residual chymosin activity was found in cheese made from UF milk than that in cheese made from control milk. The low UF …
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Rheological and nanomechanical characterization of aging in polymer modified asphalt
… such as viscosity, phase angle, shear modulus, creep compliance, stiffness, etc. are determined using Dynamic Shear Rheometer (DSR) test, Multiple Stress Creep Recovery (MSCR) test, Bending Beam Rheometer (BBR) test, Rotational Viscosity (RV) test and the Direct Tension (DT) test. Nanomechanical …
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Development of a Mechanistic-Based Approach to Evaluate Critical Conditions of Hot Mix Asphalt Mixtures
… Systems, the asphalt binder non-recoverable creep compliance using the Multiple Stress Creep Recovery test, and asphalt mixture air void content on the rutting performance of HMA mixtures. A comprehensive statistical model to predict the HMA critical temperature has been presented. The …
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Linear and Nonlinear Viscoelastic Characterization of Proton Exchange Membranes and Stress Modeling for Fuel Cell Applications
… of the membranes was characterized by conducting creep tests on uniaxial tensile specimens at various constant stress conditions and evaluating the resulting isochronal stress-strain plots. The nonlinearity was found to be induced at relatively moderate stress/strain levels under dry conditions. …
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The yielding transition in soft materials
… protocol, iterative oscillatory shear/recovery, is developed. This protocol combines strain-controlled oscillatory deformation with iterative stress-controlled recovery tests in order to experimentally decompose the recoverable and unrecoverable components of a material’s deformation in …
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ΣΥΓΚΡΙΤΙΚΗ ΜΕΛΕΤΗ ΤΟΥ ΕΡΠΥΣΜΟΥ ΜΕΤΑΞΥ ΧΗΜΙΚΩΣ ΠΟΛΥΜΕΡΙΖΟΜΕΝΩΝ ΚΑΙ ΦΩΤΟΠΟΛΥΜΕΡΙΖΟΜΕΝΩΝ ΣΥΝΘΕΤΩΝ ΕΜΦΡΑΚΤΙΚΩΝ ΡΗΤΙΝΩΝ
THE CREEP OF MICROSPECIMENS OF THREE CHEMICAL INITIATED AND THREE PHOTO INITIATED COMPOSITE RESINS WAS STUDIED USING A TORTIONAL CREEP APPARATUS IN A STATIC METHOD. THE ABOVE MATERIALS IN PAIRS HAVE THE SAME CHEMICAL COMPOSITION AND FILLER CONTENT AND DIFFER ONLY IN THE MANNER OF POLYMERIZATION. …