Transactions of Materials and Heat Treatment

Title：Experimental and numerical investigation on sheet metal forming limit prediction with thickness related criteria

Authors： LIU Chang-li ZHOU Xian-bin CHEN Jie-shi(School of Mechanical Engineering and Automation Beihang University Beijing 100083 China)

Unit：

KeyWords： thickness distribution thickness gradient thickness thinning forming limit prediction

ClassificationCode：TG386

year,vol(issue):pagenumber：2006,31(5):147-150

Abstract：

Thickness distribution and thickness gradient distribution of sheet metal ST14 tensile samples are gained by experiment,thus the onset of necking can be determined by these two types of distributions.Certain sample's thickness distribution on both sides of facture is unsymmetrical.The reason for this phenomenon is analyzed.FLD(using) single steadily deforming thickness thinning criterion and FLD using fracture thickness thinning criterion are determined.Comparing with experimental FLD,steadily deforming thickness thinning criterion has a better conformability for the left side of FLD while fracture thickness thinning criterion can predict the shape of the curve for the entire range.

Funds：

高等学校博士学科点专项科研基金资助项目(20040006022)

Reference：

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