In this study, constraint groove pressing (CGP) process and ultrasonic assisted CGP (UCGP) process were investigated on the process forces, mechanical properties of the sheet, including hardness and tensile tests and grain size. Pure copper sheets were used as samples in this research. Samples were tested both with and without ultrasonic vibrations for mechanical properties and grain size up to...

OF THE DISCLOSURE A handling system with an improved fairlead is provided for protecting a tow cable wherein the cable breaking strength exceeds the system-rated tension load; the fairlead being positioned collinearly between the system bellmouth and winch. A guide slot passes through the fairlead positioning the cable higher than the winch release point and bellmouth entry point, maintaining t...

To elucidate the possible role of structural waters in stabilizing bent DNA, various conformations of AT-containing decamers, (A5T5)2 and A10:T10, were studied by Monte Carlo simulations. The duplexes were constrained to reproduce the NMR inter-proton distances for the A-tracts at two temperatures: ~5° and ~35°C. Analysis of the water shell structures revealed a strong correlation between the g...

Abstract The demand for hot stamping parts in the automobile industry is increasing due to growth of eco-friendly vehicles with improved crash safety performance and lighter weight. However, use ultra-high-strength steel cold challenging its high yield strength low elongation. Hot a widely used process overcome this challenge, but long die quenching time reduces productivity. In order address i...

Additively manufactured polymer tools are evaluated for use in metal forming as prototype and the attempt to make sheet more attractive small production volumes. Printing materials, strategies accuracies presented before tested V-bending groove pressing of 1 mm aluminum sheets. The shows that change surface topography during until a steady state is reached at around five strokes. geometrical ac...

Press-induced long-period fiber gratings exhibiting strong core-to-cladding mode coupling were formed in photonic crystal fiber. Only one resonance peak was observed over a 600 nm spectral range and the resonant wavelength was tuned over the whole range by tilting a groove plate before pressing the fiber. The resonant wavelength decreased with increasing periodicity of the grating, which was op...