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Energy absorption in plastic expansion of circular metal tubes

Azizi, R ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. This paper investigates a new method of dissipating energy in which a rigid tube is driven into the deformable tube under axial compression. Since there is a specific clearance between the rigid and deformable tubes, the deformable tube is expanded during axial compression, and the impact energy is absorbed by plastic expansion of deformable tube and frictional energy between deformable and rigid tubes. Quasi-static axial compression tests with different values of friction coefficient between rigid and deformable tubes are performed. Theoretical formulation with consideration of strain hardening effect is presented to predict the mean crushing load. Theoretical and experimental studies show that this method of dissipating energy has high crush force efficiency and favorable crashworthiness characteristics. © CIMNE
  4. Keywords:
  5. Circular tubes ; Energy absorber ; Expansion ; Friction ; Mathematical modeling ; Circular tubes ; Crush force efficiency ; Deformable tubes ; Energy absorbers ; Experimental studies ; Friction coefficients ; Frictional energies ; Impact energy ; Mathematical modeling ; Mean crushing load ; Metal tube ; Plastic expansion ; Quasi-static ; Strain hardening effects ; Theoretical formulation ; Axial compression ; Compression testing ; Crashworthiness ; Deformation ; Energy absorption ; Expansion ; Friction ; Plasticity ; Strain hardening ; Tubes (components)
  6. Source: Computational Plasticity X - Fundamentals and Applications, 2 September 2009 through 4 September 2009, Barcelona ; 2009 ; 9788496736696 (ISBN)
  7. URL: http://congress.cimne.com/complas09/proceedings/pdfs/p384.pdf