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This paper examines the behaviour of steel beams with web openings under combined axial compression, bending moment and shear force through numerical simulation modelling. The numerical simulation results show that under either pure compression or pure bending, the plastic axial or bending capacities of beams are limited by buckling of the compressive tee-section with the reduction being much more...
The need for nanometer resolution positioning technique draws significant attention for semi-conductor industry, biotechnology, and nanotechnology. This paper presents a design of friction-drive rotary stage driven by piezoelectric (PZT) actuator. This stage includes a multiplayer PZT actuator, Scott Russel mechanism, an actuation stage, a pre-load spring and an output shaft. The rotary positioning...
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