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标题:Thermomechanics of shape memory polymers: Uniaxial experiments and constitutive modeling
时间:2019-03-15 10:22:21
DOI:10.1016/j.ijplas.2005.03.004
作者:Yiping Liu;Ken Gall;Martin L. Dunn;Alan R. Greenberg;Julie Diani
出版源: 《International Journal of Plasticity》 ,2006 ,22 (2) :279-313
摘要:Thermomechanics of shape memory polymers: Uniaxial experiments and constitutive modelingPolymer networkShape memory effectStress and strain recoveryThermomechanicsConstitutive modelShape memory polymers (SMPs) can retain a temporary shape after pre-deformation at an elevated temperature and subsequent cooling to a lower temperature. When reheated, the original shape can be recovered....
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页数:36 PAGES
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目录:
  • Thermomechanics of shape memory polymers: Uniaxial experiments and constitutive modeling
    • Introduction
    • Materials and experimental methods
    • Experimental results
      • Dynamic thermal scan
      • Schematic diagram of thermomechanical behavior
      • Isothermal static stress ndash strain tests and thermal strain
      • Thermal strain and thermal expansion coefficient
      • Stress evolution during cooling under pre-strain constraint
      • Free strain recovery after low temperature unloading
      • Stress response during heating under pre-strain constraint
      • Stress response during heating under fixed-strain constraint
    • A constitutive model for shape memory polymers
      • Model approach and development
      • Thermodynamic considerations
      • Evolution equations for internal variables and material properties
    • One-dimensional modeling results and discussion
      • Fitting and determination of material parameters
      • Prediction of the strain storage and stress response during cooling
      • Reproduction of the free strain recovery for undeformed and pre-tensioned sample
      • Prediction of the stress recovery under pre-strain constraint
      • Prediction of the stress recovery under fixed-strain constraint
      • Prediction of the 1-D strain and stress recovery under flexible constraint
      • Additional insights
    • Conclusions
    • Acknowledgements
    • References

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