Mechanical response of polypropylene under multiple-step loading

A. D. Drozdov

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Experimental data are reported on isotactic polypropylene in uniaxial multiple-step cyclic tests at room temperature. The deformation programs involve (i) one- and two-step cyclic tests with a stress-controlled program (ratcheting with various maximum stresses and the zero minimum stress), (ii) short-term creep tests on specimens subjected to cyclic deformation, (iii) cyclic tests with a stress-controlled program on specimens subjected to creep flow, and (iv) triple-step tests (ratcheting with various maximum stresses interrupted by creep). A pronounced difference is observed in damage accumulation under creep and cyclic loading. Applicability is discussed of these observations for lifetime prediction under fatigue conditions.

Original languageEnglish
Pages (from-to)815-823
Number of pages9
JournalInternational Journal of Solids and Structures
Volume50
Issue number5
DOIs
StatePublished - 1 Mar 2013
Externally publishedYes

Keywords

  • Damage accumulation
  • Isotactic polypropylene
  • Ratcheting
  • Viscoelastoplasticity

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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