08 polymers mech prop
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08 polymers mech prop

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08 polymers mech prop Presentation Transcript

  • 1. Materiali per l’IngegneriaM.Ferraris1StrainStressσ1σ2ε1 ε2Secant modulus at σ1 = σ1/ε1Tangent modulus at σ2 = dσ/dεPolymers: mechanical properties
  • 2. Materiali per l’IngegneriaM.Ferraris2
  • 3. Materiali per l’IngegneriaM.Ferraris3
  • 4. Materiali per l’IngegneriaM.Ferraris4
  • 5. Materiali per l’IngegneriaM.Ferraris50 200 400 600 800 1000 1200010203040 HDPECarico[MPa]allungamento %
  • 6. Materiali per l’IngegneriaM.Ferraris6
  • 7. Materiali per l’IngegneriaM.Ferraris7elastomers
  • 8. Materiali per l’IngegneriaM.Ferraris8
  • 9. Materiali per l’IngegneriaM.Ferraris9Deformation of cross-linked bondsElongation of chains
  • 10. Materiali per l’IngegneriaM.Ferraris10natural rubber0 200 400 600 800 100001020gomma naturaleCarico[MPa]allungamento %
  • 11. Materiali per l’IngegneriaM.Ferraris11
  • 12. Materiali per l’IngegneriaM.Ferraris12
  • 13. Materiali per l’IngegneriaM.Ferraris13
  • 14. Materiali per l’IngegneriaM.Ferraris140 10 20 30 40 50 60 70 80 90 100010203040506070 polistireneABSpolicarbonatoCarico[MPa]allungamento [%]
  • 15. Materiali per l’IngegneriaM.Ferraris15Design of mechanicalproperties for polymersexample:High impact polystirene(HIPS) containing elastomerparticles
  • 16. Materiali per l’IngegneriaM.Ferraris16
  • 17. Materiali per l’IngegneriaM.Ferraris17
  • 18. Materiali per l’IngegneriaM.Ferraris18Fatigue curves
  • 19. Materiali per l’IngegneriaM.Ferraris19
  • 20. Materiali per l’IngegneriaM.Ferraris20CREEP
  • 21. Materiali per l’IngegneriaM.Ferraris21
  • 22. 22
  • 23. 23
  • 24. 24
  • 25. 25
  • 26. 26blowing
  • 27. 27