Sheet stretching: A theoretical-experimental comparison

Abstract

This paper presents numerical solutions of axisymmetric sheet stretching employing an experimentally determined stress-strain curve and measured overall coefficient of friction along the punch-sheet interface. Experiments have been conducted on thin sheet metals such as mild steel, aluminum and brass with a hemispherical steel punch. Predicted values of loads, deflections, strain distributions and other relevant data are favorably compared with experimental values of these same quantities. NOTATION ciju fourth order material constant tensor D~j rate of deformation tensor p uniform normal pressure P punch load rc radius of contact boundary r ratio width to thickness strain average r value R orthogonal rotation tensor R t transpose of orthogonal rotation tensor x~ current coordinates X~ reference coordinates equivalent strain 0 arc angle of punch rate of rotation tensor # coefficient of friction r shear stress p punch radius # equivalent stress a* rotated Cauchy stress a v stress rate tensor ~b angle with rolling direction.

Numerical Simulation of the Effect of Punch Paths on the Quality of Sheet Metal Stretch Forming

“…In order to show the effect of friction on the stretch formed sheet metal, a coefficient of friction equals to zero represents perfect lubrication and a coefficient of friction equals to 0.12 represents stretch forming or deep drawing at the interfaces of the punch and sheet metal. Although 0.12 is smaller than 0.191 for mild steel [4], it shows the effect of friction, the Coulomb friction model was used in the simulation. The two punches were modelled in the stretching process, they can move in the x and y directions.…”

Numerical Investigation of MHD Casson Nanofluid Flow Towards a Non Linear Stretching Sheet in Presence of Double-Diffusive Effects Along With Viscous and Ohmic Dissipation

“…Afterthat, Gupta and Gupta [2] extend Crane [1] work over different mathematical geometries. Yoon et al [3] studied the theoretical and experimental results using Coulomb friction model by considering punch-sheet interface. Also, Sarma and Rao [4] examined the viscoelastic fluid flow by considering stretched sheet.…”

“…7, No. 2, Special Issue 13, pp [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. February,…”

GFEM analysis of MHD nanofluid flow toward a power‐law stretching sheet in the presence of thermodiffusive effect along with regression investigation

“…After that, Gupta and Gupta 5 extended the study by Crane 4 by considering different geometries. Yoon et al 6 reported on a comparison between theoretical and experimental results by considering a thin metal stretching sheet. Also, Sarma and Rao 7 examined the viscoelastic fluid flow by considering a stretched sheet.…”