Mode-II interlaminar fracture of composite materials in the presence of randomly distributed defects

Autor:	Rajesh S. Kumar
Rok vydání:	2021
Předmět:	Materials science Mechanics of Materials Plane (geometry) Modeling and Simulation Delamination Computational Mechanics Mode (statistics) Fracture (geology) Linear scale Fracture mechanics Composite material Finite element method Parametric statistics
Zdroj:	International Journal of Fracture. 231:201-221
ISSN:	1573-2673 0376-9429
DOI:	10.1007/s10704-021-00581-4
Popis:	The focus of the present paper is on the mode-II (shear mode) interlaminar fracture of laminated composite materials with randomly distributed defects such as those generated due to the manufacturing process. The study is conducted using cohesive-zone Finite Element (FE) models of the Interlaminar Shear (ILS) and the End Notch Flexure (ENF) geometries with explicit inclusion of defects on a representative interlaminar plane. The effective interlaminar shear strength and the effective mode-II fracture energy are obtained by comparing the FE analysis with explicit defects against corresponding homogeneous models. Based on the parametric FE results it was found that the effective ILS strength and the mode-II fracture energy are significantly affected by the defects present on the critical interlaminar fracture plane, and when the defects are small, they follow a linear scaling with the defect area fraction. Simulations with various defect sizes reveal that for defects larger than the size of the delamination process-zone, the concept of the effective ILS strength and effective mode-II fracture energy is not valid, and defects must be represented explicitly in the models.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9b87d14e09f4dad12d7b68c78e8ab5bb https://doi.org/10.1007/s10704-021-00581-4 Zobrazit plný text záznamu Plný text ve formátu PDF