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Stuart P. Keeler, Circular Grid System — A Valuable Aid for Evaluating Sheet Metal Formability, SAE Transactions, Vol. 77, Section 1: Papers 680005–680246 (1968), pp. 371-379 ...
SAE Transactions, Vol. 116, Section 2: JOURNAL OF COMMERCIAL VEHICLES (2007), pp. 354-359 (6 pages) The sheet metal forming is conventionally studied using circular grid analysis. The recent ...