The measurement of strains in stamped sheet metal is essential to design and producing sound sheet metal products. The measured strains, also, can be used in verifying the reliability of computer analysis such as finite element method. Measuring strai...
The measurement of strains in stamped sheet metal is essential to design and producing sound sheet metal products. The measured strains, also, can be used in verifying the reliability of computer analysis such as finite element method. Measuring strains is difficult and need much time. In most engineering applications, strains are measured from the square or circular grid that are marked before deformation. In this case, however, strains are averaged in each grid and the localized strain, occurred in smaller region than grid size, can not be measured. In this study, the B-spline surface interpolation technique introduced in order to measure the strains more exactly and conveniently. The strains measured by using she surface interpolation technique are compared with the strains calculated from the grid shape and by the finite element analysis.<br/>