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This study is to develop structures with the ability to convert a compression force into radial extension or shear force, to increase power output through piezo shear mode. In this work, a piezoceramic-spring system was developed with two types of force-spreading spring configurations, the Belleville disc springs and the crinkle washer. A force loading profile is applied to a piezoceramic element and structure causing the force to be distributed in different directions when compared to a conventional helical spring damping system or compression. The performances of these novel structures were studied using Multiphysics simulation and experiments. This work shows that both the Belleville disc and crinkle washer produce improved energy output between 15 and 22% compared to compression alone, whilst the Belleville disc spring outperformed a crinkle washer in both simulations and experiments. The results show that converting compression to shear force in energy harvesting could be a potential approach to increase the energy efficiency and energy density.

Application of a substrate integrated waveguide with wiggly ridge shape is presented for excitation longitudinal shunt slot antenna. Two main design equations for design substrate integrated waveguide structure and get parameters of structures, for longitudinal shunt slot excitation by shape wiggly ridge in substrate integrated waveguide are modified. Proposed method is used by applied the crinkle shape to ridge for ridge substrate integrated waveguide structure. This shape wiggly ridge just under longitudinal slot. The slot is place at centreline of substrate integrated waveguide (siw) in center of waveguide and on dielectric copper surface, top of substrate integrated waveguide. Amount of crinkle depth of waveguide centreline is proportional with needful radiation of slot and normalized conductance could be much to increase crinkle depth. In this paper the shunt element distribution assumption for prposed structure is spoted. Results of simulation show, proposed method is suitable candidate for replacing with usual longitudinal shunt slot. Structure’s useful is, low fabrication price, small profile and adaptation with microstrip circuit. Also slot place along waveguide centerline and wiggle depth substitute slot offset, therefore this procedure can suppress second order bim in array containing suggestion structure.

In the 1970s, rapid developments and changing technology enabled the transition from an industrial to an information society to speed up, meanwhile causing cybernetic, biomimetics and space research to accelerate. In this period, some changes appeared in the needs of people, resulting in the production of fibers and yarns that are functionally hygienic, anti bacterial, able to breathe, and resistant to ultraviolet (UV)-rays. While material criteria were becoming important in textile design in light of these changes, new esthetic effects that emerged which depended on the materials used in textile products also appeared. Different visualities were obtained as impressions such as iridescence, dull-brightness, voluminosity, and relief-like impressions in fabrics by high-tech innovations which created fibers, yarns and finishing processes in particular and properties of touch, such as softness, slipperiness, and super fluidity. Comparisons of fabrics were made between artificial and natural materials, and included in aesthetical renovations. In consideration of such data, the subject of this paper within the context of innovation brought about for clothing fabrics by high-tech fibers and yarns is as follows: the design and production of different aesthetical and visual-effect clothing fabrics with brightness and shimmering qualities in voluminous, puffy and relief-like impressions by using stainless steel and retro reflective yarns that are products of high-tech. For this purpose, 12 apparel fabrics have been designed and produced. The above-mentioned visual effects are studied in these fabrics and related differences established based on type and number of yarn, weave, and density, and structure of fabric. The different approach in this study is that voluminous, puffy, shimmering and brightness effects in clothing fabrics are obtained by stainless steel and retro reflective yarns in single and double layer structures, and as patterned fabrics. Therefore, brightness and patterns could be differently conceived based on the type of light by day or night. Another difference is that 100% stainless steel yarn is used and spun. [ABSTRACT FROM AUTHOR]