This paper written in the framework of OSIRHYS IV project which aim is to clarify uncertainties and approximations of high pressure vessel composite design and calculation. The project, headed by CEA, mainly consists in the comparison between experimental results on type IV hydrogen high pressure storage vessel and numerical results. This paper presents a composite damage behavior law whose specificity is to take into account the variability of some material parameters. A model of wound notched structures is realized and compared with experimental results in order to verify the capability of this law to model the behavior of the composite used in OSIRHYS IV type IV hydrogen storage vessel. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.