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A study in accelerated humidity-temperature ageing of plastic snaps made of glass-fiber-reinforced composites based on poly(butylene terephthalate) is reported. Samples in the form of latches with torsional beams, manufactured from PBT with various contents of glass fibers (10, 20 and 30%) were subject to accelerated ageing with the use of three various ageing cycles: two kinds of Humidity-Temperature...
The paper presents an overview of modeling techniques of piezoelectric elements and a comparison of a software for simulation mechanical and electro-mechanical systems with a piezoelectric transducer. The described models are applied to simulate a two degrees-of-freedom mechanical system with passive damping, a two-layer and multi-layer piezoelectric bimorph. The results of simulations preformed by...
In the paper designing, structures and applications of micro- and nano- systems are presented. After short introduction in fields of applications where presented systems are used authors discusses problems concerning motors and joints in MEMS. The most popular joint used in micro-system are based on flexures joints, which structure and examples are presented. Next two examples of micro-systems designed...
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