Abstract
Reliable understanding of load transfer in repaired zones of composite structures is needed for optimization of repair solutions and enhancement of post-repair behavior. Specific interest is in the analysis of local stress-strain states of composite repair, where digital image correlation (DIC) technique seems to be especially helpful. Thus, the objective is to develop and demonstrate a DIC-based experimental approach for analysis of repaired zones in composite structures including characterization of damage initiation and growth. The approach is based on experimental analysis of through-thickness distributions of internal strains as a function of applied load. Corresponding test coupons are either cut from actual repaired structures or specifically manufactured to represent topology, geometry, lay-up and properties of repaired structures. Demonstration of the approach is considered on an example of generic laminated carbon fiber composites IM7-977-3 with different lay-ups and geometrical configurations of repaired solutions. It is shown that distributions of internal strains, areas of strain concentrations, locations of damage initiation, and processes of damage growth can be experimentally observed and quantified with good accuracy.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Yang C, Huang H, Tomblin JS, Sun W (2004) Elastic–plastic model of adhesive-bonded single-lap composite joints. J Compos Mater 38:293–309
Zhang J, Bednarcyk BA, Collier C, Yarrington P, Bansal Y, Pindera MJ (2006) Analysis tools for adhesively bonded composite joints, part 2: unified analytical theory. AIAA J 44:1709–1719
Gurvich MR, Jagdale VN (2012) Damage tolerance analysis of repaired composite structures: engineering approach and computational implementation. In: 2012 3DS SIMULIA community conference, providence, RI, 15–17 May 2012, pp 48–62
Adams RD, Atkins RW, Harris JA, Kinloch AJ (1986) Stress analysis and failure properties of carbon-fibre-reinforced-plastic/steel double-lap joints. J Adhes 20:29–53
Kumar SB, Sridhar I, Sivashanker S, Osiyemi SO, Bag A (2006) Tensile failure of adhesively bonded CFRP composite scarf joints. Mater Sci Eng B 132:113–120
Towse A, Potter KD, Wisnom MR, Adams RD (1999) The sensitivity of a Weibull failure criterion to singularity strength and local geometry variations. Int J Adhes Adhes 19:71–82
Hutchinson JW, Suo Z (1992) Mixed-mode cracking in layered materials. Adv Appl Mech 29:63–191
Gleich DM, Van Tooren MJL, Beukers A (2001) Analysis and evaluation of bondline thickness effects on failure load in adhesively bonded structures. J Adhes Sci Technol 15:1091–1101
Kafkalidis MS, Thouless MD (2002) The effects of geometry and material properties on the fracture of single lap-shear joints. Int J Solids Struct 39:4367–4383
Campilho RDSG, de Moura MFSF, Ramantani DA, Morais JJL, Domingues JJMS (2009) Tensile behaviour of three-dimensional carbon-epoxy adhesively-bonded single and double-strap repairs. Int J Adhes Adhes 29:678–686
Campilho RDSG, de Moura MFSF, Pinto AMG, Morais JJL, Domingues JJMS (2009) Modelling the tensile fracture behaviour of CFRP scarf repairs. Compos Part B Eng 40:149–157
Li S, Thouless M, Waas A, Schroeder J, Zavattieri P (2006) Competing failure mechanisms in mixed-mode fracture of an adhesively bonded polymer–matrix composite. Int J Adhes Adhes 26:609–616
Pinto AMG, Campilho RDSG, de Moura MFSF, Mendes IR (2010) Numerical evaluation of three-dimensional scarf repairs in carbon-epoxy structures. Int J Adhes Adhes 30:329–337
de Moura MFSF, Gonçalves JPM, Chousal JAG, Campilho RDSG (2008) Cohesive and continuum mixed-mode damage models applied to the simulation of the mechanical behaviour of bonded joints. Int J Adhes Adhes 28:419–426
Acknowledgement
The authors thank the United Technologies Research Center for support of this study and permission for publication.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2015 The Society for Experimental Mechanics, Inc.
About this paper
Cite this paper
Gurvich, M.R., Clavette, P.L., Jagdale, V.N. (2015). Experimental Analysis of Repaired Zones in Composite Structures Using Digital Image Correlation. In: Tandon, G. (eds) Composite, Hybrid, and Multifunctional Materials, Volume 4. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-06992-0_12
Download citation
DOI: https://doi.org/10.1007/978-3-319-06992-0_12
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-06991-3
Online ISBN: 978-3-319-06992-0
eBook Packages: EngineeringEngineering (R0)