Finite element simulations of sheet metal forming under complex strain paths

Abstract

Fracture is a common defect in sheet metal forming and it is essentially caused by tensile instability. This paper analyzes some experiments and theories for building forming limit diagrams of sheet metal and points out the advantages and disadvantages of current experiments and theories. According to this, a method that integrates the finite element simulation and experiment was used to research the forming limit diagrams of the sheet metal under complex strain paths. Taking the rear hanger that undergoes twice stamping as an example, the strain paths of the dangerous point of the rear hanger is investigated. Finally, the forming method of the rear hanger is confirmed. Results indicate that finite element method (FEM) can achieve the complex strain paths and different strain paths will have great impacts on the result of the sheet metal forming.

Machine Learning, Mechatronics, and Stretch Forming: A History of Innovation in Manufacturing Engineering

“…Integration of finite element simulations and experimentation is used to study the forming limit diagrams when subjected to complex strain paths. Results indicate that the use of finite element simulation can faithfully reproduce intricate strain patterns, which play a significant role in determining the success of sheet metal forming [99].…”

Effect of heat treatment temperatures on formability of SS 304 during tube hydroforming process

“…Excessive localized thinning and formability are two significant issues that both industrialists and scientists are continually attempting to comprehend in sheet metal area. Because of that, formability prediction accuracy in sheet/tube forming procedures accepts essential significance in all the manufacturing process developments [4][5][6]. Forming limit curves (FLCs) are useful to decide the formability in sheet metal.…”