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 10 of 10 for “"Model composites"”.
-
Healing of complex damage modes in model composites
… self-healing systems to fiber reinforced composites has proven to be difficult due to the high temperatures and pressures of processing as well as the requirement that the delivery scheme for the healing agent must exist in the interstitial regions between fibers. Additionally, assessment …
-
Dynamic Fiber Debonding and Push-Out in Model Composites
As an outcome of the numerical analysis, two major modifications were made to the experimental set-up: (a) stress information near the composite specimen was collected by a combination of quartz crystal transducer-strain gage measurement; (b) the crack initiation and propagation was explored by a …
-
Crystallization behavior and morphological features of two LARC polyimides and local orientation studies of two semicrystalline model composites
… temperature or inherent viscosity. Molecular modelling predicted a low-energy helical conformation with a near-periodic repeat distance corresponding to the second SAXS peak. This conformation is offered as a tentative explanation for that peak. Finally, the effe.ct of nucleating agent on the …
-
Investigation of Oxide Fiber/oxide Matrix Composites With a Weak Interphase
Interface properties of four kinds of fiber model systems were obtained by analyzing pushout data with the linear model, the shear-lag model, and the Liang-Hutchinson model. These interface properties include interface fracture energy, coefficient of friction, clamping pressure, interface debond …
-
Microstructural studies of vapor-deposited nickel/ceramic composites
… interactions through the analysis of model composites produced by plasma-assisted physical vapor deposition (ion plating) and consisting of thin ($<$1 micrometer) metallic films on a ceramic substrate. The two major aspects of this research are: (1) the investigation of the effects of …
-
NANOSTRUCTURED MATERIALS FOR ALKALIS ION BATTERIES AND THEIR MECHANISTIC STUDIES
… demonstrate some new approaches in the design of composites of carbon matrixes / large capacity anodes, such as conversion metal oxides and lithium alloys. More than the significantly improved electrochemical profiles of these model composites, the correlation between structures and …
-
Toughening mechanisms in weak matrix ceramic composites
<p>"Tough behavior of ceramic matrix composites is closely related to the weak interface between fiber and matrix. The weak interfaces in composites have been provided by reducing the chemical bonding and the residual thermal stresses between constituents. A new way to introduce the weak interface …
-
Particulate composite material internal deformation measurements using x-ray microtomography and digital volume correlation
Typical particulate composites used in engineering applications consist of complex microstructures with a range of particulate sizes and often high particulate volume fractions (65%-95%). Examples of these are, explosives and rocket propellants for defense and aerospace applications, asphalt …
-
Micromechanics of finite length fibers in composite materials
A theoretical model is derived to study the point-wise stress variations which occur in the constituents of a hybrid 3-D short fiber composite subjected to arbitrary homogeneous loading conditions. The model includes the capability to analyze composites containing different types of fibers, …
-
Fundamental studies of the behaviour of biomass and waste materials in gasification systems
… the behaviour of the RDF materials by preparing model composites containing mixtures of cellulosic materials and poly(ethene), PVC and Saran. The results indicated that char yields and char characteristics were influenced by component interactions during the pyrolysis process, with the presence …