DUGi

Cohesive zone length of orthotropic materials undergoing delamination

http://dugi.udg.edu/item/http:@@@@hdl.handle.net@@2072@@298080

Polymer-based laminated composite materials can fail by delamination. Cohesive zone development occurs during delamination, where dissipation mechanisms take place. Within a numerical framework, a fine discretization is needed along the cohesive zone length to accurately capture the non-linear stress distribution. Knowing the cohesive zone length beforehand is important for meshing purposes. This paper presents a literature review of existing analytic expressions. The limitations and range of applicability of the analytic formulas are discussed. Novel empirical formulas are proposed to predict the cohesive zone length of homogeneous orthotropic materials with a crack growing under pure mode I or pure mode II

This work has been partially funded by the Spanish Government (Ministerio de Economía y Competitividad - MICINN) under Contract MAT2013-46749-R and MAT2015-69491-C3-1-R. The first author would like to acknowledge the predoctoral Grant BES-2014-070374 of ”Subprograma Estatal de Formación del MICINN”. The second, the fifth, and the sixth authors would like to thank the financial support of ERA-Net AirTN 01/2012, under the project ”Damage tolerance for thin ply textile composites (DAMTEX)

Elsevier