Critical Spring Back Characteristics in Aluminum, Copper, and Pure Steel: Experimental Analysis

EasyChair Preprint 15438

Abstract

^{One of the most challenging problems faced by large-scale manufacturing engineers is the spring back (SB) of sheet metals noted after removing mold loads. This issue can affect the aerodynamic performance of manufactured automobiles, airplanes, and ships. nonetheless, this concern is not sufficiently discussed in the available literature. A lack of experimental investigations does exist. Thus, this research is performed to explore the pattern of SB issue in three mostly utilized metals, including steel, aluminum, and copper. An experimental approach was adopted through which corresponding metal specimens and metal sheets were prepared to be inspected relying on standard apparatus and testing machines. V-shape molds were exploited. Tensile stress, compressive stress, deformations, and strain rates were examined. The results revealed that the SB value (elastic recovery proportion) would rise after removing the applied mold loading as the punch die radius increases in steel and aluminum. But in copper, the rise in the punch radius would lessen the elastic recovery ratio. As the punch radius rises, the force could spread to larger plastic volume. Thus, the elastic recovery ratio would rise. Steel and copper exhibit larger elastic recovery ratios after removing the mold load than aluminum through all thicknesses. Larger punch radii of the contact area between the punch and the sheet would become greater. As a result, the bending moment would rise, resulting in a large SB angle. Steel, copper, and aluminum and could exhibit different ranges of SBP characteristics. The aluminum has lower ratios of SBP/ elastic recovery portion than steel and copper. When the SBP bending radius increases, the metal would show remarkably stability of the SB behavior than the lower bend radius}

Keyphrases: Aerodynamic performance, Aluminum, Copper, Manufacturing, Sheet Metal Forming (SMF), Spring back (SB), experimental analysis, mold loading, steel

@booklet{EasyChair:15438,
  author    = {Elham Abdullah and Abdulkareem Jalil},
  title     = {Critical Spring Back Characteristics in Aluminum, Copper, and Pure Steel: Experimental Analysis},
  howpublished = {EasyChair Preprint 15438},
  year      = {EasyChair, 2024}}