Numerical Simulation Methods of Sheet Metal Wrinkling Instability Problem

doi:10.3901/JME.2018.24.042

Abstract

Abstract: The light weight of parts manufacturing in the automotive, aerospace and aerospace industries has led to the prediction of wrinkling instability defects in sheet metal forming, which has become a major concern of the industry. However, based on the current status of conventional numerical simulation algorithms that do not include wrinkle instability criteria and thereout cannot implement the wrinkle numerical predictions, the plate diagonal tensile testing is used as a comparative verification object to find the proper numerical prediction methods for wrinkling instability. With the platform software ABAQUS it is confirmed that the conventional shell element dynamic algorithm (^*DYNAMIC) used to simulate the deformation of thin-walled parts and the arc length method (^*RIKS) used for structural part buckling calculation cannot be used to calculate the wrinkle problem of sheet metal forming. Three ways of sheet wrinkling instability prediction method:"the eigenvalue analysis(^* BUCKLE analysis) for microdefects introduction + ^*DYNAMIC analysis", "^*BUCKLE analysis + ^*RIKS analysis" and "three-dimensional solid element dynamic display algorithm" are tried and compared with the tests. The three algorithms are studied in terms of calculation accuracy, application scope, and algorithm features. The numerical simulation method with the best comprehensive performance for solving the wrinkling instability problem in sheet metal forming is established.

Key words: numerical simulation, plate diagonal tensile testing, sheet metal forming, wrinkling instability

CLC Number:

TG386

DU Bing, GUAN Fenglong, SONG Pengfei, HAN Zhaojian, ZHANG Xin, ZHAO Changcai. Numerical Simulation Methods of Sheet Metal Wrinkling Instability Problem[J]. Journal of Mechanical Engineering, 2018, 54(24): 42-50.

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