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Forming limit diagram of tubular hydroformed parts considering the through-thickness compressive normal stress

Hashemi, R ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1177/1464420714562652
  3. Publisher: SAGE Publications Ltd
  4. Abstract:
  5. In this study, the effect of a compressive normal stress has been considered in the determination of forming limit diagrams and forming limit stress diagrams to predict neck initiation failure in tube hydroforming of T-shaped parts. Computation of the forming limit diagrams and FLSDs is based on the generalized Marciniak and Kuczynski method to consider the existence of through-thickness compressive normal stress. The proposed forming limit diagrams and FLSDs were used in conjunction with ABAQUS/EXPLICIT finite element simulations to predict the onset of necking in tube hydroforming of T-shaped part. The amount of calibration pressure and axial feeding required to produce an acceptable part in finite element method was compared to published experimental data, and a satisfactory agreement between the FEM and test results has been achieved. Therefore, the present approach can be used as a reliable criterion to design tube hydroforming processes and reduce the number of costly trials
  6. Keywords:
  7. Experiment ; ABAQUS ; Forming ; Graphic methods ; Metal forming ; Tubes (components) ; Finite element simulations ; Forming limit diagrams ; Forming limit stress diagram ; Hydroforming ; Simulation ; Through-thickness ; Tube hydroforming ; Tube hydroforming process ; Finite element method
  8. Source: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications ; Volume 230, Issue 1 , 2016 , Pages 332-343 ; 14644207 (ISSN)
  9. URL: http://journals.sagepub.com/doi/10.1177/1464420714562652