Cohesive zone modeling of dynamic failure in homogeneous and functionally graded materials

Zhengyu Zhang, Glaucio H. Paulino

Research output: Contribution to journalArticlepeer-review

Abstract

This work investigates dynamic failure processes in homogeneous and functionally graded materials (FGMs). The failure criterion is incorporated in the cohesive zone model (CZM) using both a finite cohesive strength and work to fracture in the material description. A novel CZM for FGMs is explored and incorporated into a finite element framework. The material gradation is approximated at the element level using a graded element formulation. Examples are provided to verify the numerical approach, and to investigate the influence of material gradation on crack initiation and propagation in Mode-I as well as in mixed-mode fracture problems. The examples include spontaneous rapid crack growth in homogeneous and FGM strips, dynamic crack propagation in actual monolithic and epoxy/glass FGM beams (three-point bending) under impact loading, and mixed-mode crack propagation in pre-cracked steel and graded plates.

Original languageEnglish (US)
Pages (from-to)1195-1254
Number of pages60
JournalInternational journal of plasticity
Volume21
Issue number6
DOIs
StatePublished - Jun 2005
Externally publishedYes

Keywords

  • Dynamics
  • Finite element method
  • Functionally graded material
  • Graded composites
  • Graded finite element
  • Intrinsic cohesive zone model
  • Mixed-mode fracture

ASJC Scopus subject areas

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

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