Materials Literature
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This report documents the results of thermal analyses to predict the daily as-run temperatures for the AGR-1 experiment. Control gas gaps and compact-graphite holder gas gaps were modeled to change linearly with time. The control gas gap widths were determined by comparison to measured R/B data. The compact graphite h…
It has been said that the presence of colour requires three things: a source of illumination, an object to interact with the light that emanates from this source and a human eye to observe the effect which results. In the absence of any one of these, it may be argued that colour does not exist. This chapter presents a…
This work reports on the investigation of steel corrosion behavior in 1000 mm in length reinforced concrete beams under sustained load, aiming to define a feasible experimental protocol for corrosion monitoring. The beams were subjected to wetting (5% NaCl for corroding cases and tap water for control ones) and drying…
It is often advantageous to account for the microstructure of the material directly using multiscale modeling. For computational tractability, an idealized repeating unit cell (RUC) is used to capture all of the pertinent features of the microstructure. Typically, the RUC is dimensionless and depends only on the relat…
We have demonstrated a low temperature fully integrated process for a ferroelectric random access memory array for potential flexible electronics applications. The memory cell is based on a two-transistor-two-capacitor structure, with cadmium sulfide as the semiconductor material for n-channel thin-film transistors, a…
Incorporation of multifunctionality to fibre reinforced polymer composite materials delivers many benefits. One example includes improved longevity of components through increasing permissible temperatures of operation, which could be achieved via in-situ cooling. As the temperature of composite components approaches…
ABSTRACT The strain rate‐dependent response of Al2O3/Al composite is examined using a split‐Hopkinson pressure bar apparatus. High‐speed photography is used to establish that the strain develops inhomogeneously in the specimen due to the onset and propagation of a kink band. The power balance equation is exploited in…
In nature, both material and structure are formed according to the principles of biologically controlled self-assembly, a process defined as the spontaneous and reversible ordering of small molecular building blocks under the influence of non-covalent, static interactions. The orientation and distribution of reinforci…
Discovering and characterizing new smart materials is an urgent need to close the performance-gaps of standard active materials. There is still the demand for a material providing high modulus, low density and large strain. Carbon materials catch scientific attention since a while but one sort among these is of specia…
Transparent shape memory gels (SMGs) were developed in our group recently. They are smart materials having the ability to return from a deformed state (temporary shape) to their original (permanent) shapes upon application of a temperature change, which is named the shape memory. One of medical applications of SMGs is…
Shape Memory Alloys (SMAs) are one of the most widely used smart materials. Their attractive characteristics make them interesting for the development of novel devices. Most of these devices make use of their shape memory effect or superelasticity; these effects are based on diffusionless phase transitions. SMAs can b…
Shape memory alloys (SMA) are capable to remember a previously programmed form even after strong deformation. The reversible deformation of pseudoelastic SMA takes place on the basis of stress-induced martensitic phase transformation. These alloys are also interesting for elastic spring and damping elements, making th…
The present paper investigates three types of electrically conductive polymers (ECPs), namely polyaniline, polypyrrole and poly(3,4-ethylenedioxythiophene) PEDOT composite with multi-walled carbon nanotubes (CNTs) for supercapacitor applications. Their capacitive performance has been evaluated in both three electrodes…
In this study, the controlled release tablet of diltiazemhydrochloride was developed. The controlled releasetablets were prepared with ethyl cellulose by changingthe ratio of diltiazem hydrochloride and the in vitrorelease studies were carried out by using an ultrasonicwater bath. According to release results, a new e…
Smart materials, such as thermal or magnetic shape memory alloys, provide interesting characteristics for new solid state actuators. However, their behavior is highly nonlinear and determined by strong hysteresis effects. This complex behavior must be adequately considered in simulation models which can be applied for…
In electrical engineering terminal connectors are commonly used for connecting and releasing electrical conductors. Within the clamp or contact area the conductor is clamped safely and steadily by a mechanical mechanism to ensure a connection with a consistent quality and safety during the whole period of application.…
A new approach to self-healing systems is presented that aims to overcome the inherent drawbacks of conventional liquid resin based healing systems within composites. Finite embedded systems offer limited healing potential for small volume delaminations and as such cannot effectively heal large damage volumes often as…
Magnetic shape memory alloys (MSMAs) are materials commonly used for actuation, sensing, and/or power harvesting applications. To date, these applications have primarily been explored under a magnetic field and/or a compressive stress, with the stress and the field acting along directions perpendicular to each other.…
Welding and joining of NiTi based shape memory alloys (SMAs) is essential for their integration into an increasing variety of applications. The titanium elemental constituent significantly complicates joining, especially with dissimilar materials where brittle intermetallics are often formed. There have been a relativ…
Dielectric Electroactive Polymers (DEAP) are a favorable actuator technology and are receiving much attention because of their lightweight, high energy density, high energy efficiency, scalability and low noise features. In order to take steps using this technology effectively, real world models should be developed an…