Academic literature on the topic 'Delamination'

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Journal articles on the topic "Delamination"

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Mei, Hanfei, Asaad Migot, Mohammad Faisal Haider, Roshan Joseph, Md Yeasin Bhuiyan, and Victor Giurgiutiu. "Vibration-Based In-Situ Detection and Quantification of Delamination in Composite Plates." Sensors 19, no. 7 (2019): 1734. http://dx.doi.org/10.3390/s19071734.

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This paper presents a new methodology for detecting and quantifying delamination in composite plates based on the high-frequency local vibration under the excitation of piezoelectric wafer active sensors. Finite-element-method-based numerical simulations and experimental measurements were performed to quantify the size, shape, and depth of the delaminations. Two composite plates with purpose-built delaminations of different sizes and depths were analyzed. In the experiments, ultrasonic C-scan was applied to visualize the simulated delaminations. In this methodology, piezoelectric wafer active
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Panda, Rabi S., Prabhu Rajagopal, and Krishnan Balasubramaniam. "Characterization of delamination-type damages in composite laminates using guided wave visualization and air-coupled ultrasound." Structural Health Monitoring 16, no. 2 (2016): 142–52. http://dx.doi.org/10.1177/1475921716666411.

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This article reports on the characterization of delamination damages in composite laminates using wave visualization method. A combination of plate-guided ultrasound and air-coupled ultrasonics is used to locate and visualize delaminations. The study focuses on the physics of Lamb wave propagation and interaction with delaminations at various through-thickness locations and positions. Three-dimensional finite element simulations are used to study, in detail, the changes in wave features such as mode velocity, wavelength and wave refraction in the delamination region. These wave features provid
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Ueda, Masahito, and Akira Todoroki. "Asymmetrical Dual Charge EPCM for Delamination Monitoring of CFRP Laminate." Key Engineering Materials 321-323 (October 2006): 1309–15. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.1309.

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CFRP laminate is sensitive to impacts. Even a low impact creates delamination, bringing deterioration of the structural reliability. Monitoring for delamination is, therefore, indispensable to maintain the reliability of a CFRP structure. In this study, asymmetrical dual charge electric potential change method was introduced to estimate a delamination in the CFRP laminate. Delaminations were estimated using response surfaces as solver of the inverse problem. Learning data of response surfaces were calculated by FEM analyses. Actual delaminations in the CFRP laminate were successfully identifie
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Ellison, Andrew, and Hyonny Kim. "Shadowed delamination area estimation in ultrasonic C-scans of impacted composites validated by X-ray CT." Journal of Composite Materials 54, no. 4 (2019): 549–61. http://dx.doi.org/10.1177/0021998319865311.

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Although ultrasonic pulse-echo C-scanning is a mature non-destructive evaluation technique for imaging internal damage in composite structures, a major impediment of obtaining a full characterization of the internal damage state is delamination shadowing effects. Specifically, shadowing refers to regions of interest that are behind other delamination planes or discontinuities with respect to the scanning surface. The delamination planes block ultrasonic wave transmission and the regions of interest are thus hidden (i.e. shadowed) from the scan. A methodology has been developed to expand ultras
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Zhang, Zhi Fang, Krishna Shankar, Murat Tahtali, and Evgeny V. Morozov. "Graphical Detection Method for Delaminations." Applied Mechanics and Materials 66-68 (July 2011): 1410–15. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.1410.

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In this paper, a simple graphical method for the detection of delaminations in damaged composite laminates is introduced. By using this method, both delamination size and location can be predicted accurately. First, a frequency database for the damaged beams with a range of delamination sizes and locations is generated using a Finite Element (FE) model; then for each mode, a surface plot relating the delamination size, location and frequency shift is generated. The next step is to look up the actual frequency shift (either from numerical simulation or experiment) from surface plots relating to
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Hwang, Shun Fa, and Horng Ming Chen. "Compression Tests of Unidirectional Composite Laminates with Two Delaminations." Key Engineering Materials 306-308 (March 2006): 381–86. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.381.

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Compression tests are conducted on composite laminates consisting of 16 unidirectional carbon/epoxy layers with two through-width delaminations. Two types of delamination length and location are considered. One is that a short delamination is located at the middle surface along the thickness direction and a long delamination is positioned between the second layer and the third layer. The other is that a long delamination is located at the middle surface and the position of the short elamination is between the second layer and the third layer. The results indicate that if the long delamination
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Bhat, Sunil, and S. Narayanan. "Numerical investigations on delaminated Glare under uni-axial tension." International Journal of Structural Integrity 7, no. 4 (2016): 553–70. http://dx.doi.org/10.1108/ijsi-07-2015-0021.

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Purpose – Since failure of laminated composites by delaminations is common, the purpose of this paper is to present a numerical procedure to check the stability of delaminations in fiber metal laminate (Glare), with different possible damage configurations, under uni-axial tension. Deformation behavior of the laminate is also examined. Influence of the type and the extent of damage, represented by varying sizes and number of delaminations, on delamination driving force and laminate deformation is found. Design/methodology/approach – Delaminated Glare is modeled by finite element method. Interf
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Kardomateas, G. A. "The Initial Post-buckling and Growth Behavior of Internal Delaminations in Composite Plates." Journal of Applied Mechanics 60, no. 4 (1993): 903–10. http://dx.doi.org/10.1115/1.2901000.

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The initial post-buckling and growth behavior of delaminations in plates is studied by a perturbation procedure. In this work, no restrictive assumptions regarding the delamination thickness and plate length are made, i.e., the usual thin film assumptions are relaxed. The perturbation procedure is based on an asymptotic expansion of the load and deformation quantities in terms of the distortion parameter of the delaminated layer, the latter being considered a compressive elastica. Closed-form solutions for the load and midpoint delamination deflection versus applied compressive displacement du
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Xing, Shutao, Marvin W. Halling, and Paul J. Barr. "Delamination Detection of Reinforced Concrete Decks Using Modal Identification." Journal of Sensors 2012 (2012): 1–17. http://dx.doi.org/10.1155/2012/156583.

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This study addressed delamination detection of concrete slabs by analyzing global dynamic responses of structures. Both numerical and experimental studies are presented. In the numerical examples, delaminations with different sizes and locations were introduced into a concrete slab; the effects of presence, sizes, and locations of delaminations on the modal frequencies and mode shapes of the concrete slab under various support conditions were studied. In the experimental study, four concrete deck specimens with different delamination sizes were constructed, and experimental tests were conducte
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Ding, Wenxiang, Maxime Bavencoffe, and Marc Lethiecq. "Modeling and Experimental Characterization of Bonding Delaminations in Single-Element Ultrasonic Transducer." Materials 14, no. 9 (2021): 2269. http://dx.doi.org/10.3390/ma14092269.

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Ultrasonic transducers performance can be seriously deteriorated by loss of adhesion between some constitutive elements such as the active element, the backing, or the matching layer. In the present work, the influence of bonding delaminations on the performance of a single-element ultrasonic transducer, which is composed of a piezoelectric disk, a backing, and a matching layer, is studied numerically and experimentally. Based on the positions between layers, two cases, i.e., delaminations between ceramic and backing or between ceramic and matching layer, are considered. Each case involves thr
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Dissertations / Theses on the topic "Delamination"

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Whitcomb, J. D. "Instability-related delamination growth of embedded and edge delaminations." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/77755.

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Compressive loads can cause local buckling in composite laminates that have a near-surface delamination. This buckling causes load redistribution and secondary loads, which in turn cause interlaminer stresses and delamination growth. The goal of this research effort was to enhance the understanding of this instability-related delamination growth in laminates containing either an embedded or an edge delamination. There were three primary tasks: 1) development of a geometrically nonlinear finite element analysis named NONLIN3D; 2) performance of a parametric analytical study to determine the e
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Ding, Wei. "Delamination analysis of composite laminates." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0001/NQ41141.pdf.

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Wright, Jennifer Edith. "Compound bifurcations in delamination buckling." Thesis, University of Bath, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432375.

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Batel, Mehdi. "Acoustic determination of adhesive bond delamination." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/18201.

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Pernice, Maria Francesca. "On delamination migration in composite laminates." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.702469.

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Carbon fibre/epoxy composite laminates are well known to be susceptible to delamination. Delamination usually grows at interfaces between plies with dissimilar fibre orientation and may migrate from one interface to another, as in low-velocity impact damage or skin-stringer debonding. Much of the modelling work in the literature focuses on delamination contained within a single ply interface, using data from characterization tests in which delamination grows at interfaces between plies of the same fibre orientation, mainly because of a lack of understanding of the fundamental causes of delamin
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Chong, Iok Tong. "Steam driven delamination in electronics packages /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?MECH%202002%20CHONG.

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Dinc, Dincer. "Delamination Of Layered Materials Under Impact Loading." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1060623/index.pdf.

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In this study, a cold worked tool steel and a low carbon steel ( St 37 ), which were joined by brazing, were subjected to impact and shear loading. The end product is used as paper cutting blades in the industry. Effects of different brazing filler metals on the delamination of the blades under impact loading and on the impact toughness of the blades were studied. The target is to achieve higher impact toughness values without delamination. Impact toughness of the steels, joined by Cu, CuNi and BNi brazing filler metals and separation of brazed surfaces under shear loading were studied. The
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Olsson, Robin. "Impact response and delamination of composite plates /." Stockholm, 1998. http://www.lib.kth.se/abs98/olss0528.pdf.

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Dávila, Carlos G. "Delamination initiation in postbuckled dropped-ply laminates /." This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-07282008-134842/.

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Brewer, John C. (John Charles) 1961. "Failure of graphite/epoxy induced by delamination." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/35945.

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Books on the topic "Delamination"

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Center, Langley Research, ed. Instability-related delamination growth of embedded and edge delaminations. National Aeronautics and Space Administration, Langley Research Center, 1988.

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Center, Langley Research, ed. Instability-related delamination growth of embedded and edge delaminations. National Aeronautics and Space Administration, Langley Research Center, 1988.

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Center, Langley Research, ed. Instability-related delamination growth of embedded and edge delaminations. National Aeronautics and Space Administration, Langley Research Center, 1988.

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Whitcomb, John David. Instability-related delamination growth of embedded and edge delaminations. Virginia Polytechnic Institute and State University, 1988.

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Adams, Donald Frederick. Delamination micromechanics analysis. University of Wyoming, 1985.

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Center, Langley Research, ed. Fractography of composite delamination. University of Utah, 1990.

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1954-, Newaz Golam M., ed. Delamination in advanced composites. Technomic Pub. Co., 1991.

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M, Newaz Golam, ed. Delamination in advanced composites. Technomic Pub. Co, 1991.

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Institute of Materials, Minerals, and Mining, ed. Delamination behaviour of composites. Woodhead, 2008.

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University of Utah. Dept. of Materials Science and Engineering. and Langley Research Center, eds. Fractography of composite delamination: Final report. University of Utah, Materials Science and Engingeering Dept., 1989.

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Book chapters on the topic "Delamination"

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Gooch, Jan W. "Delamination." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_3400.

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Kerkstra, Randy, and Steve Brammer. "Delamination." In Injection Molding Advanced Troubleshooting Guide. Carl Hanser Verlag GmbH & Co. KG, 2021. http://dx.doi.org/10.1007/978-1-56990-835-8_25.

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Kerkstra, Randy, and Steve Brammer. "Delamination." In Injection Molding Advanced Troubleshooting Guide. Carl Hanser Verlag GmbH & Co. KG, 2018. http://dx.doi.org/10.3139/9781569906460.025.

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Kerkstra, Randy, and Steve Brammer. "Delamination." In Injection Molding Advanced Troubleshooting Guide, 2nd ed. Carl Hanser Verlag GmbH & Co. KG, 2021. http://dx.doi.org/10.3139/9781569908358.025.

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Jacob, J. W., G. Mertens, and J. Declerk. "Mirror Delamination." In The IEA/SSPS Solar Thermal Power Plants — Facts and Figures— Final Report of the International Test and Evaluation Team (ITET). Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82684-9_49.

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Baylakoglu, I., and E. Hedin. "PCB Delamination." In The ELFNET Book on Failure Mechanisms, Testing Methods, and Quality Issues of Lead-Free Solder Interconnects. Springer London, 2011. http://dx.doi.org/10.1007/978-0-85729-236-0_12.

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Liechti, Kenneth M. "Delamination Mechanics." In Springer Handbook of Experimental Solid Mechanics. Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-30877-7_34.

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Kachanov, L. M. "Delamination Buckling." In Mechanics of Elastic Stability. Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2819-0_2.

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Kachanov, L. M. "Delamination Growth." In Mechanics of Elastic Stability. Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2819-0_3.

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Stolz, Claude. "Delamination of Laminates." In Springer Series in Solid and Structural Mechanics. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-51920-8_8.

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Conference papers on the topic "Delamination"

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Byrnes, Geoffrey B. "Specified Delamination." In SSPC 2000. SSPC, 2000. https://doi.org/10.5006/s2000-00004.

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Abstract Experience shows that the same types of delamination failures occur repeatedly, often when new coating systems are applied over old ones. The failures arise due to faulty specifications that fail to take into account the physics, chemistry and mechanical properties that govern coating behavior. Examples of this are given and the rules discussed.
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Schmitt, Guenter, Christian Kaminski, and Renate Lobnig. "NDT of Delamination in or under Thick Organic Coatings Using Active IR Thermography." In CORROSION 2016. NACE International, 2016. https://doi.org/10.5006/c2016-07718.

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Abstract The integrity of organic coatings can be impaired by disbonding due to permeation of water vapor in temperature and osmotic gradients between the outer environment and the base metal surface, due to cathodic protection at locally destructed coatings or simply by poor adhesion. For thin coatings the degree of delamination is easily determined by the intensity of blisters which generally arise already after short exposure periods. However, thick coatings with thicknesses above 2 mm take much longer for blistering and larger delaminations, and develop visible blisters only in an advanced
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Leidheiser, Henry. "Inhibition in the Context of Coating Delamination." In CORROSION 1989. NACE International, 1989. https://doi.org/10.5006/c1989-89142.

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Abstract Many protective polymeric coatings suffer delamination from a metal substrate when the coated metal is immersed in an electrolyte and the potential of the metal is cathodic to its normal corrosion potential. The delamination process is a consequence of the oxygen reduction reaction occurring beneath the coating. Inhibition requires limiting the access to the reaction site of any of the four required species: oxygen, water, cations and electrons. Other ways to reduce the severity of attack include reducing the pH at the interface between the coating and the metal, increasing the resist
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Li, S. X., K. Lee, J. Hulog, R. Gannamani, and S. Yin. "Signature Analysis of Package Delamination Using Scanning Acoustic Microscope." In ISTFA 1996. ASM International, 1996. http://dx.doi.org/10.31399/asm.cp.istfa1996p0287.

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Abstract Package delaminations are often associated with electrical and package reliability problems in IC devices. Delaminations caused by electrical-over-stress (EOS) and moisture expansion during reflow soldering have shown different delamination patterns. A Scanning Acoustic Microscope (SAM) can be used to detect package delaminations. Understanding these delamination signatures can help us quickly identify the failure cause at an early stage of the failure analysis.
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Chen, Deliang, Changping Chen, Yiming Fu, and Liming Dai. "Growth of Delamination for Laminates Circular Plates Subjected to Transverse Loads." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10687.

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By using movable boundary variational principle, a set of nonlinear governing equations for the delaminated circular plate including the transverse shear deformation and contact effect between the delaminations subjected to transverse load are derived and the corresponding boundary and matching conditions are given. At the same time, according to the Griffith criterion, the formulas of total energy release rate and its individual mode components along the delamination front are obtained and the delamination growth is studied. In the numerical calculation, the delamination growth of axisymmetri
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Dauda, Benjamin, S. Olutunde Oyadiji, and Prasad Potluri. "Dynamic Properties of Delaminated Braided Textile Composite Beams." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59462.

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In this paper, vibration analysis of through-width single- and multi-delaminated cantilevered composite beams is carried out using Finite Element Analysis (FEA) approach. Different configurations of multiple delaminations are considered. The FEA results for single delaminations are validated via experimental testing. It is found that changes in the natural frequencies of delaminated cantilevered beams are related to the number, type and distributions of delaminations within a beam. Also, the natural frequency shifts due to single or multiple delaminations are influenced by the thickness-wise l
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Mendioroz, A., D. Sagarduy-Marcos, J. Pérez-Arbulu, et al. "Sizing the geometrical parameters of semi-infinite delaminations using optically excited lock-in infrared thermography." In 4th Asian Quantitative InfraRed Thermography Conference. QIRT Council, 2023. http://dx.doi.org/10.21611/qirt.2023.06.

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The aim of this work is to characterize the geometrical parameters of a 2D delamination: length, depth and thickness. First, we calculate analytically and numerically the surface temperature oscillation of a sample, containing a semi-infinite delamination, as the material is homogeneously illuminated by a modulated light beam. Then, we perform an inverse parametric estimation of synthetic temperature amplitude and phase data to size the geometrical parameters of the delamination. Finally, we present lock-in infrared thermography experiments performed on AISI-304 stainless steel samples contain
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Leigh, Tim, and Azam Tafreshi. "Delamination Buckling of Composite Cylindrical Panels Under Axial Compressive Load." In ASME 7th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2004. http://dx.doi.org/10.1115/esda2004-58578.

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Composite cylindrical shells and panels are widely used in aerospace structures. Delaminations within the composite structure reduce the compressive strength of laminates, and often result because of damage incurred during manufacturing and in-service use. This paper investigates the buckling behaviour of laminated cylindrical panels loaded in axial compression using the finite element method. The use of three-dimensional finite elements for predicting the delamination buckling of these structures is computationally expensive. Here the analysis has been carried out using a layerwise shell fini
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Pelegri, Assimina A., and Charles Valentine. "Experimental Investigation of Compressive Overloads on Delamination Growth Behavior in Fatigued Composites." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0504.

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Abstract The behavior of laminated graphite/epoxy composites under variable amplitude compressive loading is studied. Laminate composites in aerospace applications undergo both compressive and tensile fatigue stresses as well as spectrum loading. These materials are particularly susceptible to compressive loads and overloads, which cause the growth of any small pre-existing delaminations. Such delamination growth, and the resulting sublaminate buckling, are major causes of fatigue failure. This experimental program investigates the effects of overloads on laminate composite specimens in which
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MASSEY, JUSTIN, BARRETT ROMASKO, and HYONNY KIM. "NOVEL ENCLOSED DELAMINATION INJECTION REPAIR PROCESS FOR STRENGTH RESTORATION." In Proceedings for the American Society for Composites-Thirty Seventh Technical Conference. Destech Publications, Inc., 2022. http://dx.doi.org/10.12783/asc37/36491.

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Delaminations are a common damage mechanism that occurs on composite structures due to in-service impacts. Enclosed damages less than 50 mm in diameter are of particular interest for repair. Current practices for repair of delaminations include: cut out of the damage and applying a patch or doubler to the cutout site, or injection using a repair resin. The use of a bonded doubler repair is more invasive and requires a cutout that acts as a stress concentration in the area of the repair. Injection repairs have traditionally been a faster, less expensive way to repair composite delaminations. Ho
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Reports on the topic "Delamination"

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Bradley, Walter L. Delamination Fracture in Graphite/Epoxy Materials. Defense Technical Information Center, 1986. http://dx.doi.org/10.21236/ada173255.

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Kay, G. Simulations of carbon fiber composite delamination tests. Office of Scientific and Technical Information (OSTI), 2007. http://dx.doi.org/10.2172/923091.

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Saigal, S., S. Muralidhar, A. Jagota, and S. J. Bennison. Cohesive Formulations for Delamination in Polymer Layered Composites. Defense Technical Information Center, 2000. http://dx.doi.org/10.21236/ada378866.

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Mandell, John F., and William J. Tsai. Effects of Porosity on Delamination of Resin-Matrix Composites. Defense Technical Information Center, 1990. http://dx.doi.org/10.21236/ada258817.

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Chen, Hsin-Piao, and Aditi Chattopadhyay. Characterization and Detection of Delamination in Smart Composite Structures. Defense Technical Information Center, 2006. http://dx.doi.org/10.21236/ada470797.

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Sandhu, R. S., W. E. Wolfe, R. L. Sierakowski, C. C. Chang, and H. R. Chu. Finite Element Analysis of Free-Edge Delamination in Laminated Composite Specimens. Defense Technical Information Center, 1991. http://dx.doi.org/10.21236/ada251659.

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Cox, Brian, Christian Lundsgaard-Larsen, and Roberta Massabo. Test and Material Specifications for Dynamic Delamination Studies of Z-Pinned Laminates. Defense Technical Information Center, 2007. http://dx.doi.org/10.21236/ada482267.

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Larsen, Ross E., Xin He, and Robert Tirawat. The Effect of Aging on the Delamination Fracture Energy of Glass Solar Reflectors. Office of Scientific and Technical Information (OSTI), 2018. http://dx.doi.org/10.2172/1472245.

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Bocchieri, Robert T., Douglas S. Dierdorf, Kristofor S. Cozart, et al. Experimental Investigation of Widespread Delamination Damage to Composite Materials Caused by Radiant Heating. Defense Technical Information Center, 2013. http://dx.doi.org/10.21236/ad1009242.

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Sheets, Colton, and Brent Vyvial. PR-201-164502-R01 Study to Evaluate Delamination and Disbonding of Composite Repairs. Pipeline Research Council International, Inc. (PRCI), 2018. http://dx.doi.org/10.55274/r0011500.

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Composite reinforcement systems have seen extensive use in the pipeline industry over the last two decades as solutions to address a range of pipeline integrity threats. Despite their widespread use, few options exist for reliable inspection of installed composite reinforcement systems. Additionally, there is a lack of well-defined criteria for acceptable flaw types and sizes when found during inspection of the composite repairs. The purpose of this study was to provide information regarding the current state of available composite inspection techniques as well as the impact of delamination an
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