Creep rupture and viscoelastoplasticity of polypropylene

A. D. Drozdov

Research output: Contribution to journalArticlepeer-review

52 Scopus citations


Observations are reported on isotactic polypropylene in tensile tests with various strain rates, relaxation tests at various strains, and creep tests with various stresses at room temperature. Constitutive equations are derived for the viscoelastic and viscoplastic responses of semicrystalline polymers at three-dimensional deformations with small strains. The stress-strain relations involve eight material constants that are found by fitting the experimental data. The model is applied to the numerical analysis of creep failure of polypropylene under various deformation modes (uniaxial tension, equi-biaxial tension, shear, multiple-step creep tests).

Original languageEnglish
Pages (from-to)2277-2293
Number of pages17
JournalEngineering Fracture Mechanics
Issue number12
StatePublished - 1 Aug 2010
Externally publishedYes


  • Constitutive model
  • Creep failure
  • Polypropylene
  • Viscoelasticity
  • Viscoplasticity

ASJC Scopus subject areas

  • Materials Science (all)
  • Mechanics of Materials
  • Mechanical Engineering


Dive into the research topics of 'Creep rupture and viscoelastoplasticity of polypropylene'. Together they form a unique fingerprint.

Cite this