Effect of cohesive zone length on the delamination growth of the composite laminates under cyclic loading. (1st October 2020)

• Record Type: Journal Article
• Authors: Esmaili, Ali; Taheri-Behrooz, Fathollah
• Is Part Of: Engineering fracture mechanics. Volume 237(2020)
• Publication Date: 2020-10-01
• Subjects: Delamination -- Cohesive zone model -- Cohesive zone length -- Composites laminates; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2020.107246
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: New relation is proposed to calculate the cohesive zone length in mixed-mode. Improvement of the Turon's model to predict delamination fatigue. Effect of structural geometry to estimate cohesive zone length. Abstract: In this paper, the cohesive zone model based on dissipative energy developed by Turon is improved by modifying the cohesive zone length. The modified model is implemented in Abaqus software using the USDFLD subroutine. In addition to the material effect, this cohesive zone length model also considers the impact of structural geometry to estimate cohesive zone length. A novel formulation in the mixed-mode condition is proposed to estimate cohesive zone length. New relation is a function of cohesive zone length of mode I & II and mode ratio. A more accurate prediction of the crack growth rate was obtained using the new model compared with the experimental data taken from the literature.