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.
Results
Showing 1 to 20 of 31 for “"dynamic mechanical properties"”.
-
Dynamic Mechanical Properties of Resilin
… relaxation. While much is known about the static mechanical properties of resilin, it is most often used dynamically by insects. Unfortunately, the dynamic mechanical properties of resilin over the biologically relevant frequency range are unknown. Here, nearly pure samples of resilin were …
-
Dynamic Mechanical Properties of Cockroach(Periplaneta americana) Resilin
… composition of natural resilin as well as the dynamic mechanical properties vary substantially across species. This suggests that mechanical properties may be evolutionarily tuned for specific functions within an insect. Here, samples of resilin obtained from the tibia-tarsal joint of the …
-
Characterization of the Dynamic Mechanical Properties of Single Cardiovascular Cells
… tissues to mechanoadapt to maintain function. Biomechanical models provide insight into tissue behavior and disease progression that can be incorporated into clinically relevant models for guiding treatment to improve patient outcomes. Frameworks for modeling tissue mechanical properties, such as …
-
Automobile friction materials: a test instrument and technique for determining dynamic mechanical properties in relation to brake squeal
… resonance in the high audio-frequency range. Dynamic mechanical propertes appear the most likely parameters to be related to a given composition's tendency to promote squeal. Since it was necessary to test under service conditions a review was made of all the available commercial test …
-
Some dynamic mechanical properties of apple fruits and their use in the solution of an impacting contact problem of spherical fruit
… Maxwell model approximations were the best mechanical model representations that could be developed directly. These, however, appeared to be sufficiently good approximations for the data. A statistical curve fitting procedure resulted in expressions for relaxation moduli which were …
-
Flammability and durability of bamboo fabric reinforced polypropylene composites and their hybrids
Bamboo fabric has excellent mechanical properties and can also contribute substantially to fire resistance in composites. In this study, bamboo fabric has been used to reinforce polypropylene (PP) to produce eco-friendly composites. Hybridisation is a technique which may improve the strength and …
-
Structure-property relationships in novel ionomers
… ordering strongly affects the tensile and dynamic mechanical properties of the ionomer. This effect is attributed to local ionic phase continuity and the concept of restriction of chain motion by the ionic domain. Triblock copolymer ionomers from t-butyl methacrylate (tBMA) end blocks and …
-
Investigation on the Mechanisms of Elastomechanical Behavior of Resilin
… cuticles. Its protein sequence, functions and dynamic mechanical properties vary substantially across the species. Resilin can operate across the frequency range from 5 Hz for locomotion to 13 kHz for sound production. To understand the functions of different exons of resilin, we synthesize …
-
Mechanical Properties and Durability of Natural Rubber Compounds and Composites
… the effect of thermal degradation upon the mechanical properties of natural rubber compounds and apply those effects to the life prediction of off axis 2-ply cord rubber laminates. The work examined both the quasi-static and dynamic mechanical properties of two natural rubber vulcanizates, …
-
Mechanical Performance of Industrial Hemp Fibre Reinforced Polylactide and Unsaturated Polyester Composites
… and fibre/matrix interfacial strength on the mechanical properties of industrial hemp fibre reinforced polylactide (PLA) and unsaturated polyester (UPE) composites. Surface treatment of hemp fibres was investigated as a means of improving the fibre/matrix interfacial strength and mechanical …
-
Geomechanical aspects of Sintered Silicon Carbide (SSiC) waste canisters for disposal of high level radioactive waste
… Silicon Carbide (SSiC) are proposed and geomechanical safety aspects relating to such SSiC canisters are investigated. First part of the thesis reviews the state-of-the-art and demands for HLW disposal. The reason for considering Silicon Carbide (SiC) as canister material is explained. …
-
Fabrication and characterization of poly(amide-imides)/TiO₂ nanocomposite gas separation membranes
… compared to the unfilled poly(amide-imide). The dynamic mechanical properties in rubbery regions suggest that Ti0₂ domains function as physical crosslinks, increasing the rubbery plateau modulus with increasing Ti0₂ content. This behavior can be explained by the theory of rubbery elasticity. The …
-
Effects of Storage on the Linear Viscoelastic Response of Polymer-Modified Asphalt at Intermediate to High Temperatures
… of storage at room temperatures (23°C) on the dynamic mechanical properties of polymer-modified binders at intermediate and high temperatures. A typical paving grade (AC-20) and three elastomeric modifiers, each at three concentrations were used. Initial tests were performed in 1995 to evaluate …
-
The chemical structure and mechanical properties of phenolic resins and related polymers
… effect of processing variables on the punching properties. It was concluded that further work would be justified and that this should include a critical examination of the resin properties in a more controlled and systematic manner. In this investigation an attempt has been made to assess …
-
Nonlinear stochastic system identification techniques for biological tissues/
… a device capable of measuring the nonlinear dynamic mechanical properties of human tissue in vivo. The enabling technology is the use of nonlinear stochastic system identification techniques in conjunction with a high bandwidth actuator to perturb the tissue. The desktop and handheld …
-
Design and processing of low alloy high carbon steels by powder metallurgy. P/M processing and liquid phase sintering of newly designed low-alloy high carbon steels based on Fe-0.85Mo-C-Si-Mn with high toughness and strength.
… work presented has the ultimate aim to increase dynamic mechanical properties by improvements in density and optimisation of microstructure of ultra high carbon PM steels by careful selection of processes, i.e. mixing, binding, alloying, heating profile and intelligent heat treatment. ThermoCalc …
-
Studies of the Evaluation of Solid Phase Dispersants in Polymer Blends
… (PS) were chosen for this study because of the mechanical properties of these blends. To improve performance, block and graft copolymers of ethylene-styrene as solid phase dispersants (SPDs) were added to blends containing equal proportions of LDPE and PS. Since this composition represents the …
-
Performance of recycled polymeric fiber as reinforcement in bituminous mixture for road maintenance works
… tensile strength, specific gravity and dynamic mechanical properties tests were conducted on the fiber and found to be suitable for mixture improvements. These fibers are mixed with bituminous mixes for testing. The results showed an improvement of moisture susceptibility of RPET FC by …
-
Designing dynamic mechanics in self-healing nanocomposite hydrogels
… in nature is found to originate from the dynamic supramolecular scaffolds assembled via reversible interactions. To mimic this strategy, extensive efforts have been made to design polymer networks with transient crosslinks, which lays the foundation for synthetic self-healing hydrogels. …
-
Modeling of the linear viscoelastic response of polymer modified asphalt binders at intermediate and high temperatures
… study was conducted to characterize the dynamic mechanical properties of polymer modified asphalt binders at intermediate and high service temperatures. A typical paving grade asphalt and seven different elastomeric modifiers were used. The modifiers, representing a wide variety of random …
Page 1 of 2