Formulation of a consistent pressure-dependent damage model with fracture energy as input

Azam Arefi, Frans P. van der Meer, Mohammad Reza Forouzan, Mohammad Silani

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

Micromechanical simulation of composite material failure requires a pressure-dependent failure model for the polymeric matrix. Available pressure-dependent damage formulations assume a certain shape of the stress-strain law under uniaxial loading. However, upon close inspection none of the available formulations is able to reproduce the assumed shape. This implies that input values for the fracture energy cannot be recovered exactly. In this paper, a new methodology for developing consistent pressure-dependent damage models for polymeric materials is presented. Using this method the predefined shape of the stress-strain relation of an element with localized deformation under uniaxial tension can be exactly reproduced which enables further to recover the exact amount of energy dissipation consistent with the input toughness. The methodology is demonstrated for two different softening laws, namely linear and exponential softening. These models are applied to the damage analysis of unidirectional continuous fiber-reinforced composites. The formulation is validated by simulation of a test for Mode-I fracture energy characterization and comparing the load-displacement response with that obtained with cohesive elements.

Original languageEnglish
Pages (from-to)208-216
Number of pages9
JournalComposite Structures
Volume201
DOIs
Publication statusPublished - 1 Oct 2018

Keywords

  • Composites
  • Fracture energy
  • Micromechanics
  • Polymers
  • Pressure-dependent damage

Fingerprint Dive into the research topics of 'Formulation of a consistent pressure-dependent damage model with fracture energy as input'. Together they form a unique fingerprint.

Cite this