Characterizing Cohesive Zone Parameters to Model Crack Growth in Composite Materials

Hussain Al-Dakheel, Jafar Albinmousa, Idris Temitope

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


CFRP is gaining interest in several industries such as aerospace, sports, and oil field. When this material is assembled, the adhesive is considered a preference over screws and fasteners as screws holes can lead to matrix delamination. Prior applying an adhesive, surface pre-treatment is done to enhance bonding. Due to the complexity of the composite material namely in complex geometry, one can consider finite element analysis as an optimum method to model the material behavior. Failure of crack growth under cyclic loading is typically modeled using the CZM. However, finding the constitutive behavior parameters is considered challenging. In this work, the maximum stress, which is difficult to calculate experimentally, is estimated using the virtual closure technique (VCCT) as it is considered less complicated and costy than the conventional methods. The VCCT is a finite element method that is employed to simulate monotonic crack growth. From this model, the maximum stress is recorded and used as the maximum traction stress in the cohesive zone model (CZM) to simulate fatigue crack growth. The bilinear traction separation law was employed to simulate the cohesive process zone. To calibrate the model results, an experiment is conducted on two samples those were treated by two different methods. One sample has a sandblasting surface pretreatment and the other is pre-treated by peelply. Each pre-treatment enhances different material toughness and hence validity of the results if supported. Both samples were tested under both static and cyclic loadings. The maximum energy release rate and the crack length were selected as comparison parameters between the models results and the experimental observations. Overall, it was noticed that the results are considered having reasonable fit.

Original languageEnglish
Title of host publicationInternational Petroleum Technology Conference, IPTC 2022
PublisherInternational Petroleum Technology Conference (IPTC)
ISBN (Electronic)9781613998335
StatePublished - 2022
Event2022 International Petroleum Technology Conference, IPTC 2022 - Riyadh, Saudi Arabia
Duration: 21 Feb 202223 Feb 2022

Publication series

NameInternational Petroleum Technology Conference, IPTC 2022


Conference2022 International Petroleum Technology Conference, IPTC 2022
Country/TerritorySaudi Arabia

Bibliographical note

Publisher Copyright:
Copyright © 2022, International Petroleum Technology Conference.

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Fuel Technology


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