This paper aims at experimental and numerical investigation of springback behavior of sheet metals during Lbending process with emphasis on Stribeck-type friction modeling. The coefficient of friction in Stribeck curve depends on sliding velocity and contact pressure. The springback behavior of mild steel and aluminum alloy 6022-T4 sheets was studied experimentally and using numerical simulatio...

Geometry constructions of honeycomb core are finding increasing use because of their relative advantages over other structural materials in terms of improved stability, high stiffness to weight and strength to weight ratios. It provides an efficient solution to increase bending stiffness without significant increase in structural weight. However, honeycomb carton, as a new product of paper hone...

Cold roll forming (CRF) is a bending process where the bending occurs gradually in severalforming steps from an undeformed strip to a finished profile. The process is very interesting for thesheet metal industry due to the high speed in which the profile can be produced. High strength steelhas, in recent years, become more common in CRF. These materials have advantages but also<...

The role of centrally located and distributed base pair mismatches ('melting bubbles') on localized bending and stiffness of short dsDNA fragments is evaluated using time-dependent fluorescence lifetime measurements. Distributed melting bubbles are found to induce larger bending angles and decreased levels of stiffness in DNA than centrally located ones of comparable overall size. Our results i...

Microfibers composed of azobenzene-based photochromic amorphous molecular materials, namely low molecular-mass photochromic materials with a glass-forming property, could be fabricated. These fibers were found to exhibit mechanical bending motion upon irradiation with a laser beam. In addition, the bending direction could be controlled by altering the polarization direction of the irradiated li...