This paper presents two methods to design cutouts that allow damage-free folding of the stiffest possible composite self-deployable thin shell structures complex shapes. The first method uses level-set functions define a general number cutouts. second spline representation contour single cutout and optimizes its shape. Material failure detection is implemented in solution. Both are applied depl...

smartphones and tablets, increasingly utilize thinner glass, as well as chemically strengthened glass. In addition, screens with curved corners, contoured shapes, and cutouts are becoming more common. These trends make traditional mechanical glass cutting a lesseffective method during display fabrication, and a variety of laser-based techniques have appeared to replace this older technology. Th...

In this paper, accumulation of plastic deformation of AISI 1045 steel plates with circular cutouts under cyclic axial loading is studied. Loading was applied under force-control conditions. Experimental tests were performed using a Zwick/Roell servo hydraulic machine. Under force-control loading with nonzero mean force, plastic strain was accumulated in continuous cycles called ratcheting. Nume...

This study explored the free vibration problem in relation to glass fiber reinforced polymer (GFRP) plates with central cutouts and free boundaries using theoretical, experimental, and numerical methods. The theoretical formulations were derived from the classical lamination plate theory. The rectangular cutout was mathematically modeled into the stiffness matrix of the plate by multiplying Hea...

The purpose of this paper is to present a new method based on the regression analysis for estimating stress concentration factor different cutouts in orthotropic plates. existence an explicit relation terms mechanical properties can be approach analyzing viscoelastic Little research has been conducted provide relationships calculate theoretical concentration. In study first, using values compos...

This work addresses a scheduling problem arising from an application in a real industrial context, namely task scheduling in the cutting department of a clothing industry. In general, clothes are produced by assembling fabric cutouts. In the cutting department, fabric rolls on a line with a constant speed, and is cut by automated machines arranged along the line. Machines are all identical. A f...

In this paper the effect of random geometric imperfections on the critical load of isotropic, thin-walled, cylindrical shells under axial compression with rectangular cutouts is presented. Second moment characteristics of geometric imperfections are estimated by data of available measurements, a simulation procedure based on the Karhunen-Loéve expansion is applied for generating realizations of...