A J integral based method to measure fracture resistance and cohesive laws in materials exhibiting large scale plasticity

Bent F. Sørensen, Stergios Goutianos

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

A method is developed to extract the fracture resistance and mode I cohesive law of nonlinear elastic-plastic materials using a Double Cantilever Beam (DCB) sandwich specimen loaded with pure bending moments. The method is based on the J integral which is valid for materials having a non-linear stress-strain relationship as long as there is no unloading at any material point. A numerical parameter study is performed for a wide range of material and specimen parameters to examine the accuracy of the method. In the range examined, the error of the method is less than 11% and thus it can be used to measure the fracture resistance experimentally and determine the mode I cohesive law including its shape.
Original languageEnglish
Title of host publicationProceedings of the 16th European Conference on Composite Materials, ECCM 2014
Publication date2014
Publication statusPublished - 2014
Event16th European Conference on Composite Materials - Seville, Spain
Duration: 22 Jun 201426 Jun 2014
Conference number: 16

Conference

Conference16th European Conference on Composite Materials
Number16
CountrySpain
CitySeville
Period22/06/201426/06/2014

Keywords

  • Ceramics and Composites
  • Cohesive law
  • J integral
  • Non-linear material
  • Plasticity
  • Cantilever beams
  • Elastoplasticity
  • Fracture
  • Fracture toughness
  • Stress-strain curves
  • Unloading
  • Cohesive laws
  • Double cantilever beam sandwiches
  • Non-linear stress-strain
  • Nonlinear elastic plastics
  • Nonlinear materials
  • Numerical parameters
  • Numerical methods

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