Fig. 2
From: Experimental study of strain fields during shearing of medium and high-strength steel sheet
Schematic representation of the rectangular sheet sample, with square hole, and tools together with definition of the coordinate system used. Reaction forces on the moving tool as result of the velocity v are F x and F y . Definitions of sheet thickness h, tool clearance c, and tool displacements U x and U y are shown in the magnified area. A speckle pattern was applied to the sheet xy-surface in the indicated image area. RD indicates the rolling direction