Prediction of FLD for sheet metal by considering through-thickness shear stresses

• Ahmad Ghazanfari ^[1] ; Seyed Soroush Soleimanic ^[1] ; Mansour Keshavarzzadeh ^[2] ; Mostafa Habibi ^[1] ; Ahmad Assempuor ^[1] ; Ramin Hashemi ^[3]
  1. [1] Sharif University of Technology

     Sharif University of Technology

     Irán

     
  2. [2] Sakarya University

     Sakarya University

     Turquía

     
  3. [3] Iran University of Science and Technology

     Iran University of Science and Technology

     Irán

     

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• Localización: Mechanics based design of structures and machines, ISSN 1539-7734, Vol. 48, Nº. 6, 2020, págs. 755-772
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • In this study, the effect of through-thickness shear (TTS) stress has been examined on the prediction of forming limit diagrams (FLDs).

    Determination of the FLD is based on the Marciniak–Kuczynski (M–K) model with some modifications on the stress states for consideration of the TTS stress effects. For solving the equations, the Newton–Raphson method has been used. Furthermore, the Nakazima test has been simulated to investigate the stress state which occurs in the sheet during the test. Results showed that the formability of sheet metal could be better as the through-thickness stress increased. Also, implementation of TTS stress in the present model, the corresponding FLD has better agreement than the conventional FLD with the experimental test result.