Transactions of Materials and Heat Treatment

Title：Study on geometric parameters of uniaxial elastoplastic buckling

Authors： Liu Jun Ding Ziqi Han Xianhong

Unit： Shanghai Jiao Tong University

KeyWords： buckling deformation geometry relationship springback analysis 304 stainless steel elastoplasticity

ClassificationCode：TG30

year,vol(issue):pagenumber：2019,44(6):24-29

Abstract：

For the elastoplastic buckling phenomenon of sheet metal under compressive load, both theoretical and experimental studies were conducted. Then, the buckling of sheet metal was divided into loading and unloading stages for analysis, and the geometric characteristic parameter model of sheet metal buckling was established by introducing cosine contour assumption into the loading stage and introducing plane strain assumption into the unloading stage. For 304 stainless steel, experiments on buckling deformation and springback of sheet metal with different lengths were conducted by a set of multi-direction tension and compression device, and the parameters of the specimen after springback were calculated and compared with the experimental data. The results show that the height error is less than 5.4% and the length error is less than 2.5%. Further analysis of the parameters shows that the length and height of the specimen after springback increase with the increasing of the original length of the specimen, and the former is close to the linear relationship. With the increasing of sheet thicknesses, the height of the specimen increases, and the length of the specimen decreases after springback.

Funds：

国家自然科学基金资助项目（51775336）

刘俊(1994-)，男，硕士研究生 E-mail：yaoyechengming@sjtu.edu.cn 通信作者：韩先洪(1977-)，男，博士，副研究员 E-mail：hanxh@sjtu.edu.cn

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