A cohesive model for fatigue failure of polymers

Spandan Maiti, Philippe H. Geubelle

Research output: Contribution to journalArticlepeer-review

Abstract

A cohesive failure model is proposed to simulate fatigue crack propagation in polymeric materials. The model relies on the combination of a bi-linear cohesive failure law used for fracture simulations under monotonic loading and an evolution law relating the cohesive stiffness, the rate of crack opening displacement and the number of cycles since the onset of failure. The fatigue component of the cohesive model involves two parameters that can be readily calibrated based on the classical log-log Paris failure curve between the crack advance per cycle and the range of applied stress intensity factor. The paper also summarizes a semi-implicit implementation of the cohesive model into a cohesive-volumetric finite element framework, allowing for the simulation of a wide range of fatigue fracture problems.

Original languageEnglish (US)
Pages (from-to)691-708
Number of pages18
JournalEngineering Fracture Mechanics
Volume72
Issue number5
DOIs
StatePublished - Mar 2005
Externally publishedYes

Keywords

  • Cohesive finite element
  • Cohesive model
  • Fatigue failure
  • Polymeric materials

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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