Metals and Materials International

, Volume 22, Issue 6, pp 974–981 | Cite as

Evaluation of the plastic yield locus for embossed sheet using biaxial tensile tests

  • Young-Suk KimEmail author
  • Seok-Hwan Oh
  • Van-Cuong Do
  • Bong-Hyun Lee


3D-structured (embossed) aluminium sheets have been used as heat insulation materials in automotive exhaust parts because the embossments on the sheets increase the surface area and reinforce the stiffness of exhaust components. Unlike the press-forming process for flat (non-embossed) sheets, however, that for embossed aluminium sheets is constrained by many restrictions given the distinct mechanical properties and geometric 3D shape of the latter. In designing sheet-stamping tools, manufacturers have recently used CAE technologies based on finite element analysis. Guaranteeing the effectiveness of CAE technologies necessitates information about the plastic yield criterion, which is determined primarily by performing a biaxial tensile test on cruciform-shaped specimens. We measured the yield locus of an embossed aluminium 3004-P sheet by using the camera vision method instead of strain gauge measurement because of the difficulty in attaching a strain gauge to the central region of the aluminium body. The measured yield locus of the studied sheet shows that its yield stress in equi-biaxial stress is smaller than the flat sheet yield locus measured by the strain gauge method. The shape of the yield locus of the embossed aluminium sheet also adequately corresponds with Logan-Hosford anisotropic yield function.


embossed sheet aluminium biaxial test yield phenomena mechanical properties 


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Copyright information

© The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Young-Suk Kim
    • 1
    Email author
  • Seok-Hwan Oh
    • 2
  • Van-Cuong Do
    • 2
  • Bong-Hyun Lee
    • 3
  1. 1.School of Mechanical EngineeringKyungpook National UniversityDaeguRepublic of Korea
  2. 2.Graduate SchoolKyungpook National UniversityDaeguRepublic of Korea
  3. 3.Daegu-Gyeongbuk CenterKorea Automotive Technology InstituteDaeguRepublic of Korea

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