Experimental Researches on Nonlinear Strain Paths Forming for Dual Phase Steel

Li Bo Pan; Hong Chuan Zhu; Ze Hong Lei; Zhi Jian Zhang

doi:10.4028/www.scientific.net/AMR.1004-1005.209

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1004-1005Experimental Researches on Nonlinear Strain Paths...

Experimental Researches on Nonlinear Strain Paths Forming for Dual Phase Steel

Abstract:

Strain paths during sheet metal forming are always complex and nonlinear. Forming limit diagram (FLD) is a common method to determine failure in the past decades. However, it is only suitable for linear strain path condition. Regarding dual phase steel DP780, a special experiment was designed and carried out on Zwick Cupping equipment to get nonlinear strain paths. And the strain status was analyzed in FLD. It was found that FLD cannot predict failure precisely in this case. A new approach proposed by Stoughton and Yoon which based on polar effective plastic strain was introduced to analyze this nonlinear strain paths condition, the result is in good agreement with experiment, which indicated that Polar Effective Plastic Strain Diagram was an effective and precise tool to determine failure especially for complex nonlinear strain paths forming.

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Periodical:

Advanced Materials Research (Volumes 1004-1005)

Pages:

209-213

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1004-1005.209

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Online since:

August 2014

Authors:

Li Bo Pan*, Hong Chuan Zhu, Ze Hong Lei, Zhi Jian Zhang

Keywords:

Dual Phase Steel, FLD, Nonlinear Strain Path, Polar Effective Plastic Strain Diagram

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