Abstract. Automotive structural components from Advanced High Strength Steels (AHSS) can be manufactured with Flexible Roll Forming (FRF). Flange wrinkling is a common shape defect in FRF, this restricts the application of FRF automotive industry. The new Incremental Shape Rolling process (ISR) showed that high tensile transverse strain developed flange and assists plastic deformation flange. H...

We present the results of an experimental investigation on the crystallography of the dimpled patterns obtained through wrinkling of a curved elastic system. Our macroscopic samples comprise a thin hemispherical shell bound to an equally curved compliant substrate. Under compression, a crystalline pattern of dimples self-organizes on the surface of the shell. Stresses are relaxed by both out-of...

This paper presents a simplified simulation technique for orthotropic viscoelastic films. Wrinkling is detected by a combined stress-strain criterion and an iterative scheme searches for the wrinkle angle using a pseudo-elastic material stiffness matrix based on a nonlinear viscoelastic constitutive model. This simplified model has been implemented in ABAQUS/Explicit and is able to compute the ...

On-demand adhere to and detach from soft wet surfaces are crucial for hydrogels applications in tissue engineering, machines, robotics. Whereas strong adhesion has been achieved between hydrogels, on-demand switching weak benign detachment is still under explorations. Herein, we report an approach switchable by invoking a mechanical process, wrinkling. The demonstrated bonding two hydrogel adhe...