Relevant bibliographies by topics / Through transmission laser welding

Academic literature on the topic 'Through transmission laser welding'

Author: Grafiati
Published: 14 March 2023

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Journal articles on the topic "Through transmission laser welding"

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Wang, Zhen, Jian Bo Lei, and Yun Shan Wang. "Study of Polymethyl Methacrylate Laser Transmission Welding." Applied Mechanics and Materials 101-102 (September 2011): 930–33. http://dx.doi.org/10.4028/www.scientific.net/amm.101-102.930.

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Laser transmission welding (LTW) is a new technology for joining plastic components, involves a laser beam passing through a laser-transmitting part being absorbed by a laser-absorbing part at the weld interface. To form a strong bond, it is important that the weld interface be exposed to sufficient heat to melt the polymer without degrading it. This paper investigates the quality of PMMA (Polymethyl Methacrylate) laser transmission welding by using YAG (1.06um) laser. Using the orthogonal experiment method, the specimens under different parameters have been studied. In order to evaluate the mechanical resistance of the welded joint, surface profilometry and metallographic microscopy were employed. It was shown that welding quality was significantly influenced by speed, power, and welding spot size. We summarized the influence of various factors, and eventually obtained the experimental results under different experimental parameters.
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Woosman, N. M., and L. P. Frieder. "Clearweld: welding of clear, coloured, or opaque thermoplastics." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 219, no. 9 (September 1, 2005): 1069–74. http://dx.doi.org/10.1243/095440705x34775.

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The Clearweld process is a through-transmission laser welding process that offers engineers unique design options. The absorbing material that enables the welding to be carried out is available as a coating or compounded into a resin. The purpose of this paper is to provide an overview of through-transmission laser welding and to describe the Clearweld process. Design considerations were included to assist engineering in the design of parts and joint geometries that are compatible with through-transmission laser welding. Guidelines for selecting coatings or dye compounding were also provided. An experiment comparing Clearwelding with solvent bonding of poly(methyl methacrylate) to polysulphone proved Clearweld strengths to be higher than solvent bonding.
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Wang, Zhen, Yun Shan Wang, and Jian Bo Lei. "Study on Thermoplastic Materials and Absorbing Agent in Laser Transmission Welding." Advanced Materials Research 337 (September 2011): 406–9. http://dx.doi.org/10.4028/www.scientific.net/amr.337.406.

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Laser transmission welding of plastics is a joining technique which permits the welding of plastic parts with low process inherent thermal and small welding heat response area. It has high demand of process parameters and material characteristic. In order to study thermoplastic materials properties and ir-absorbing agent in laser transmission welding, experiments were taken under the same process parameters. The YAG laser Output power 200W, working distance 25mm, movement speed 10mm / s. Through the experimental results, we concluded that the different welding quality of different materials and absorbing agent, and analyzed its material characteristic reasons.
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Wang, Zhen, Yun Shan Wang, and Jian Bo Lei. "Numerical Simulation of Transmission Laser-Welding Melting Depth on Thermoplastic." Key Engineering Materials 522 (August 2012): 68–71. http://dx.doi.org/10.4028/www.scientific.net/kem.522.68.

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The principle of laser welding of combined translucent thermoplastic and absorbance thermoplastics is that laser transmit through translucent material and shoot at laser absorptive material, where the material absorb energy and melt down to complete welding. This paper studied the applicability of basic law of laser transmission welding beam mechanism and light absorption process – Beer-Lamber Law to plastic materials. Numerical simulation model of melting depth was established. Single factor relevance curve and double factor relevance surface were drawn with MATLAB; Impact of laser power, distance between weld zone and lens and scanning speed to melting depth was quantitatively analyzed on melting depth, which provided effective reference for setting parameters in the experiment.
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Barma, John Deb, Asish Bandyopadhyay, and Pradip Kumar Pal. "Parametric Optimization of Transmission Laser Welding Process Applying Taguchi Method." Advanced Materials Research 622-623 (December 2012): 294–98. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.294.

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Through Transmission Laser Welding (TTLW) of plastic material is an emerging area of research and welding of plastic. For better process control, extensive research work is necessary to explore various aspects of this relatively newer joining process for plastics. This will lead to more effect utilization of the process yielding better weld quality. This paper reports transmission laser welding on acrylic plastic materials by using a diode laser system. Analysis of variance (ANOVA) has been used to study the significance of the parameters on the performance of the welded joint. The results obtained from the pull test of the welded plastic plates have been used to with an objective to optimize the parameter settings used in the TTLW process by using Taguchi method.
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Zhong, Xue Jiao, Cai Lian Fan, Hui Xia Liu, Pin Li, and Xiao Wang. "Light Scattering of HDPE and LDPE in Laser Transmission Welding." Key Engineering Materials 667 (October 2015): 95–101. http://dx.doi.org/10.4028/www.scientific.net/kem.667.95.

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Light scattering of the upper polymer have a great influence on welding quality. Light scattering of high density polyethylene (HDPE) and low density polyethylene (LDPE) are assessed by constructing experiment and numerical computation method. Firstly, the beam quality of semiconductor laser is analyzed, power flux distribution of the laser beam in a defocused plane is measured by knife edge method; Afterwards, the power flux distributions of the laser beam after passing through HDPE/LDPE are measured by line scanning method; Lastly, with the combination of the mathematical model which is used to calculate scattering coefficient and standard deviation of scattering, scattering related parameters and the laser power flux distribution at the welding interface are obtained by writing a program in MATLAB. The results show that the light scattering coefficient of high density polyethylene is up to 0.988, the light scattering coefficient of low density polyethylene is 0.92; Higher crystalline polyethylene leads to more obvious light scattering; the laser beam power flux distribution at the weld interface affected by scattering is determined, which lays a solid foundation on numerical simulation in laser transmission welding.
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Seidl, Martin, Jiri Safka, Lubos Behalek, and Iva Novakova. "THROUGH TRANSMISSION LASER WELDING PROCESS OPTIMIZATION FOR SEMICRYSTALLINE AND AMORPHOUS PLASTICS." MM Science Journal 2020, no. 4 (November 11, 2020): 4119–23. http://dx.doi.org/10.17973/mmsj.2020_11_2020042.

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Zhang Wei, 张卫, 张庆茂 Zhang Qingmao, 郭亮 Guo Liang, and 张健 Zhang Jian. "Research on the Properties of Through-Transmission Laser Welding of Polycarbonate." Chinese Journal of Lasers 39, no. 7 (2012): 0703001. http://dx.doi.org/10.3788/cjl201239.0703001.

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Mamuschkin, Viktor, Andre Haeusler, Christoph Engelmann, Alexander Olowinsky, and Hubert Aehling. "Enabling pyrometry in absorber-free laser transmission welding through pulsed irradiation." Journal of Laser Applications 29, no. 2 (May 2017): 022409. http://dx.doi.org/10.2351/1.4983515.

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Ilie, M., V. Stoica, E. Cicala, and J. C. Kneip. "Experimental design investigation of through-transmission laser welding of dissimilar polymers." Journal of Physics: Conference Series 1426 (January 2020): 012045. http://dx.doi.org/10.1088/1742-6596/1426/1/012045.

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Dissertations / Theses on the topic "Through transmission laser welding"

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Ramachandramoorthy, Rajaprakash. "Laser transmission welding of themoplastic tubes and plates using laser refraction." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106395.

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Laser transmission welding is a method of joining plastics, which benefits from the infrared transparency in majority of thermoplastics. During the process, a laser beam passes through the laser transparent part and hits the laser absorbent part, which has been made absorbent using additives such as carbon black. The absorbed laser energy is then converted into heat and in turn welds the interface of the two parts by melting the polymer. In the current work, a new refraction technique of laser transmission welding is used to weld nylon plates to nylon tubes with carbon black. For the laser to refract, an angle was machined into the laser transparent nylon plates adjacent to the weld interface. Effect of different laser properties such as laser speed, number of laser rotations and laser power were studied on the quality of welding in terms of better finish and strength. The strength of these welds was assessed using a new tensile test fixture. Subsequently, the weld seam width was found from the tensile tested samples by analyzing the weld interface using vernier and transmission light microscopy. These tensile test results were then normalized using the weld seam area to obtain the tensile stress. The results showed the samples could withstand more tensile stress with an increase in laser power and rotation, excluding the samples which had decomposition due to excessive laser power. Also, the material property changes at the weld interface due to laser welding were characterized using a nanoindenter, for which small square samples were carved out of the weld interface and cold mounted. The results show that the modulus and hardness of nylon decreases right at the interface of the weld. In order to find the reason why there is a decline in the above mentioned mechanical properties, differential scanning calorimetry (DSC) testing was done to find possible changes in crystallinity, as decreasing modulus in semi-crystalline polymers is usually a result of decreasing crystallinity. The results confirmed that the crystallinity indeed decreased at the weld interface which would explain the decrease in mechanical properties.
Le soudage par transmission laser est une méthode pour joindre les plastiques qui prend avantage du fait que la majorité des thermoplastiques sont transparent aux infrarouges. Durant le procédé, un faisceau laser passe à travers une région transparente pour aller en frapper une autre rendue absorbante au moyen d'additifs tel que le noir de carbone. L'énergie laser absorbée est ensuite convertie en chaleur. Ce dégagement de chaleur permet de souder l'interface entre les deux parties en fondant le polymère. Dans le présent travail, une nouvelle technique de soudage par transmission laser basée sur la réfraction a été utilisée pour souder des plaques de nylon à des tubes de nylon contenant du noir de carbone. Afin de réfracter le laser, une surface en angle a été usinée à même les plaques de nylon transparentes, près de l'interface de soudage. Les effets de différentes propriétés du laser telles que la vitesse, le nombre de rotations et la puissance ont été évalués en se basant sur la qualité du soudage en termes du fini et de la résistance aux contraintes. La résistance des soudures a été déterminée à l'aide d'un nouvel accessoire de test en traction. Ensuite, la largeur de la soudure a été mesurée sur les échantillons testés en traction à l'aide d'un pied à coulisse et de la microscopie par transmission de lumière. Pour obtenir la contrainte en traction, les résultats des tests en traction ont été normalisés en les divisant par la surface réelle de leur soudure. Les résultats démontrent qu'une augmentation de la puissance et de la rotation du laser, jusqu'au seuil de dégradation, permet aux échantillons de soutenir davantage de contraintes en traction. De plus, les changements dans les propriétés du matériel dus à la soudure ont été caractérisés à l'aide d'un nano-indenteur, pour lequel de petits échantillons carrés ont été extraits de l'interface de soudure et montés à froid. Les résultats démontrent que le module et la dureté du nylon diminuent à l'interface de soudure. Puisque la diminution du module dans les polymères semi-cristallins est habituellement associée à une diminution de cristallinité, la calorimétrie différentielle à balayage a été utilisée afin de déceler les possibles changements dans la cristallinité. Les résultats confirment en effet que la cristallinité diminue à l'interface de soudure, et expliquent donc, par le fait même, la diminution des propriétés mécaniques.
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Boglea, Andrei [Verfasser]. "Laser Transmission Welding of Thermoplastics Using Local Laser Beam Modulation / Andrei Boglea." Aachen : Shaker, 2013. http://d-nb.info/1050345991/34.

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No, Donghun. "A study of the combined socket and butt welding of plastic pipes using through transmission infrared welding." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1104437266.

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No, Dong Hun. "A study of the combined socket and butt welding of plastic pipes using through transmission infrared welding." Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1104437266.

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Thesis (Ph. D.)--Ohio State University, 2005.
Title from first page of PDF file. Document formatted into pages; contains xxi, 221 p.; also includes graphics (some col.) Includes bibliographical references (p. 218-221).
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Bahrami, Amir. "Carbon nanotubes as near infrared laser susceptors." Thesis, University of Cambridge, 2011. https://www.repository.cam.ac.uk/handle/1810/230112.

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The coupling efficiency of carbon nanotubes with near infrared laser radiation at 940nm wavelength was investigated. Nanotubes treated with different post processing methods were irradiated at different laser power intensities as dry samples and suspensions in water or ethanol. The interaction with the laser beam was measured and quantified based on the temperature increase in the samples as well as the amount of energy transmitted through them. Parallel experiments using carbon black revealed better performance of carbon nanotubes in terms of coupling efficiency and heat dissipation to their surroundings. It was found that most of the incident radiation on an individual carbon nanotube is absorbed, resulting in extreme local temperature increases proportional to the laser intensity, which can lead to instant tube oxidation in air. Such high heats are efficiently transferred to the material in immediate contact with the nanotubes, increasing its temperature very rapidly. The most intriguing results were obtained in the presence of water where the observations suggested, disintegration of carbon nanotubes with each laser pulse. It is shown that extremely high local temperatures vaporise the water in the immediate vicinity of a carbon nanotube and result in a water-gas reaction. It is further postulated that such effects can be achieved with laser beams at power intensities near the skin tissue's safe exposure thresholds, and therefore can potentially be used as a method of removing nanotubes from living tissue. This has advantages in providing an exit route for nanotubes whether introduced on purpose for reasons of medicine or therapy, or possibly, as a result of inadvertent exposure. Further studies on laser heating and transmission through different dry samples, highlighted that more crystalline structures such as that of a heat-treated nanotube, are more effective in causing extinction of the laser beam and a reduction in the transmitted beam intensity, however the tubes with more defects or with a length comparable to the radiation wavelength are very effective in converting the absorbed laser energy to heat. This effect is exacerbated when the laser beam is polarised parallel to the long axis of the carbon nanotubes. These heating effects were exploited to create welds in high density polyethylene using through transmission laser welding. The resultant welds showed better than or equal mechanical performance to welds made using industrial absorbers such as carbon black or Clearweld®.
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Kennedy, Christopher. "Properties of High Energy Laser Light Transmission through Large Core Optical Cables." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5797.

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Laser induced damage is of interest in studying the transmission of large amounts of optical energy through step-index, large core multimode fibers. Optical fibers often have to be routed around objects when laser light is being transmitted between two locations which require the fiber to bend into a curve. Depending on how tight the bend is, this can result in transmission losses or even catastrophic damage when the energy density of the laser pulse exceeds the damage threshold of silica glass. Waveguide theory predicts that light traveling through a bend will form whispering-gallery modes that propagate through total internal reflection bounces along the inside of the outer edge of the bend. This is critical since in these locations the energy density of the light will increase significantly, raising the potential of laser damage, nonlinear effects, and transmission losses. This loss is especially problematic when two 90[degree] bends going in opposite directions are in close proximity to each other, forming an 'S-bend'. Light that is grouped along the outer edge going through the first bend will enter the second bend at a sharper angle which causes much high transmission losses and raises the possibility of failure. Models using R-Soft BeamProp and Zemax were developed to study transmission losses, investigate light interactions at critical areas, and predict under which conditions laser damage would occur. BeamProp presents a clearer view of the modal distribution of light within the core of the fiber and is used to analyze how a plane wave with a Gaussian intensity distribution excites the fiber modes. Zemax provides a tool to perform non-sequential ray tracing through the fiber cable and stray light analysis within the core and once the light exits the fiber. Intensity distributions of the cross sectional area of the fiber shows the whispering gallery modes forming as the light propagates around bends and disburses as it propagates afterwards. It was discovered using R-Soft that if the separation distance between bends in an S-bend is approximately 3 mm there exists a condition where maximum transmission occurs. For 365 μm diameter core fiber it was calculated that the difference in output power could be as high as 150%. This was initially completely unexpected; however ray tracing using Zemax was able to verify that this distance allows the light to transition so that it enters the 2nd bend at the optimal angle to enter the whispering gallery mode. Experiments were performed that validated the models' predictions and images were captured clearly showing the spatial distribution shift of the light within the core of the fiber. Experiments were performed to verify light grouping together to form whispering gallery modes as predicted by Zemax. Microscope images were taken as a function of distance from various bends to observe the periodic nature in which the laser light fills up the fiber. Additionally, a configuration was setup to examine stimulated Brillioun scattering and determine the onset of laser damage in the fiber. Fibers were tested as a function of bend radius and number of shots and recommendations for future systems were made. Lastly, mechanical failure tests were performed to determine the relationship between stress placed on the fiber through bending and fiber lifetime in a static environment. This allowed a minimum safe bend radius to be calculated for a 30 year lifetime that agreed with previous calculated values.
M.S.
Masters
Optics and Photonics
Optics and Photonics
Optics
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Paleocrassas, Alexander Grant. "Feasibility Investigation of Laser Welding Aluminum Alloy 7075-T6 through the use of a 300 W, Single-Mode, Ytterbium Fiber Optic Laser." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-08062005-173047/.

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Aluminum alloys are important structural materials because of their high strength to weight ratio. Unfortunately, due to their high reflectivity and complexity in heat treatment, aluminum alloys are some of the hardest metals to be laser welded successfully and very high laser power is usually required. In this study, the feasibility of using a 300 W, Single-Mode, Ytterbium Fiber Optic Laser for aluminum welding is investigated. The objective is to explore an application area with low power and low welding speed. As the fiber laser offers much better beam quality (M2 less than 1.05), the results show that, with proper control of welding parameters, the success of aluminum welding can be achieved at considerably low laser power with minimal formation of typical welding defects (porosity, cracking etc.). However, the focusing becomes highly critical as exceeding a certain power density can lead to defects such as blowholes and porosity. The deepest penetration achieved was just over 1 mm at 300W and 2 mm/sec. Other welding processes achieve about three to four times as much penetration at the expense of seven times more power. Further development of this process can lead to a more efficient use of power.
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Noori, Rahim Abadi Seyyed Mohammad Ali. "Investigation of Melt Pool Thermo-hydrodynamic Behaviour inLaser Beam Welding ofTi-6Al-4V through Numerical Simulation." Licentiate thesis, Högskolan Väst, Avdelningen för svetsteknologi (SV), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-17410.

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Laser is an efficient and widely used heat source in metal processing suchas welding and additive manufacturing. It has some great advantages compared to the other conventional heat sources like electron beam and arc namely: ability of handling complicated joint geometries and producing large components. Laser beam welding encompasses many complex physical phenomena such asheat transfer, metal melting, flow and solidification, free surface deformation, evaporation and possibly vaporization. The aim of this research work istwo-fold: gain deeper process understanding and improve the model reliability. Deeper process understanding is sought on the effect of beam shaping on themelt pool. To achieve improved model reliability, a good support consists in using qualitative experimental data representing the process. Thus, 3D validation of the melt pool geometry is performed while it was usually 2D inprevious research works. Furthermore, a new calculation procedure for laser absorption is introduced. To conduct this research work, a Computational Fluid Dynamics approach is used. A solver, capable of tracking the deformation of the melt free surface, is developed in OpenFOAM. Concerning beam shaping, it is found that not only the melt pool size as previously known but also the melt flow pattern is modified through elongating the beam shape.This last result could not be revealed by former studies as the non-transparent media hinders optical observation. New in-process quantitative measurements performed by a project partner are used to test the model. Weaknesses of the former absorptivity models are highlighted, as well as the limitations of the proposed model. Finally, the results show that the proposed absorptivity model function of local surface conditions leads to much better agreement with experimental results compared to the former constant absorptivity model. The maximum discrepancy compared to the experimental measurement, which is observed for the melt pool depth, can indeed be reduced to about 10%.
Laser är en effektiv och allmänt använd värmekälla vid svetsning och additiv tillverkning. Den har några viktiga fördelar jämfört med andra konventionella värmekällor såsom elektronstråle och elektrisk ljusbåge, nämligen: den kan ofta användas till komplicerade svetsgeometrier, och den kan producera stora komponenter. Lasersvetsning involverar olika sammansatta fysikaliska fenomen såsom värmeöverföring, metallsmältning, flöde, stelning, ytdeformation, avdunstning och i vissa fall förångning. Syftet med mitt forskningsarbete är tvåfaldigt: att få en djupare processförståelse och att förbättra modellens tillförlitlighet. Fördjupad processförståelse eftersträvades för att förstå hur formen på laserstrålen påverkar svetssmältan. För att uppnå förbättrad modellsäkerhet behövs experimentella data av hög kvalitet som representerar processen. Således utfördes 3D-validering av smältgeometrin medan det vanligtvis var 2D i tidigare forskningsarbeten. Dessutom har en ny modell för laserabsorption föreslagits. I forskningen har numerisk strömningssimulering (Computational Fluid Dynamics) använts för att simulera processen och en numerisk lösare, som kan spåra deformationen av den rörliga smälta ytan, är utveckladi programvaran OpenFOAM. Beträffande laserstrålens utbredning visar resultaten att svetssmältans storlek och även svetssmältansflöde modifieras genom att laserstråleformen förlängs. Medan den förra är känd från tidigare experimentella studier upptäcktes den senare inte före denna studie eftersomdet icke-transparenta mediet hindrar optisk observation. Nya (in-process) kvantitativa mätningar utförda av en projektpartner har använts för att testa modellerna. Svagheter i den tidigare absorptionsmodellen framhävdes, liksom begränsningarna i den föreslagna modellen. Slutligen visade resultaten att den föreslagna modellen där laserabsorptionen är en funktion av lokala ytförhållanden ledde till en bättre overensstämmelse med mätningar jämfört med den tidigare modellen med konstant laserabsorbtion. Den maximala avvikelsen jämfört med experimentell mätning, som observerades med avseende på smältbassängsdjupet, kunde reduceras till cirka 10%.

Till licentiatuppsats hör 2 inskickade artiklar, som inte visas nu.

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Litera, Jan. "Analýza vlivu přesahu na pevnost svarového spoje součásti z kompozitu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-418210.

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Nowadays, components made of metallic materials are increasingly being replaced by components made of plastics or composites with a polymer matrix. This is associated with the issue of production processes such as pressing or welding, i.e. the influence of process parameters on the output properties of the product. The presented thesis deals with the issue of the combination of pressing and welding of a composite part, specifically the influence of the pressing overlap on the strength and tightness of the welded joint. The first part is focused on a search of available literature related to the problem. The second part deals with solving the problem using experimental modeling. Part of this chapter is inclusion of computational modeling in the design of experiment, detailed measurement of essential dimensions, microtome analysis and statistical processing and evaluation. The third part focuses on the creation of a method for evaluating the strength of the weld based on the pressing overlap using computational modeling. Essential part is also validation of the computational model based on previous experimental measurements. Finally, two methods for evaluation of the weld strength are presented. The first works on the basis of computational modeling and the second on the basis of experimental modeling. At the same time, the presumptions of usage of the created methods and their drawbacks are pointed out. Furthermore, the possibilities of their implementation in the initial design of the welded joint and the proposal for the next procedure are described.
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Cao, Xiaochao. "WELD READ-THROUGH DEFECTS IN LASER TRANSMISSION WELDING." Thesis, 2010. http://hdl.handle.net/1974/5916.

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In laser Transmission Welding (LTW), the laser beam passes through the transparent part and is dissipated as heat in the absorbent material through the use of laser-absorbing pigments such as carbon black (CB). This energy is then conducted further into both parts. Melting and subsequent solidification occur at the interface causing a weld to form between the two parts. Gluing or welding structures to the back of automotive Class-A panels often results in the appearance of undesirable surface deformations on the Class-A side. Through control of the laser welding and material parameters, it may be possible to use contour LTW as a means of joining structures to the back of absorbent Class-A panels without creating these unwanted surface defects. A series of lap welds was made using a range of CB levels, laser powers and polypropylene part thicknesses. A profilometer was used to measure the size and shape of the defects generated on the surface of the black part. Two types of defects were observed: ribs and sink marks. It was observed that lower powers combined with higher carbon black levels generally resulted in smaller defects. The type of defect depended on the boundary conditions between the two parts and the flow of polymer that had thermally expanded during welding (flash). If weld flash flowed into gaps between the two plates, rib defects were always observed. If flash flowed elsewhere and no gaps existed between the plates, sink marks occurred. Finite element modeling was used to qualitatively validate these observations.
Thesis (Master, Chemical Engineering) -- Queen's University, 2010-07-02 14:34:41.201
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Books on the topic "Through transmission laser welding"

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W, Hunter William, and United States. National Aeronautics and Space Administration., eds. Optical transmission through a polarization preserving single mode optical fiber at two Ar⁺ laser wavelengths. [Washington, D.C.?: National Aeronautics and Space Administration, 1990.

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Adamovsky, Grigory. Laser beam propagation through inhomogeneous media with shock-like profiles: Modeling and computing. [Cleveland, Ohio]: National Aeronautics and Space Administration, Lewis Research Center, 1997.

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Laser Transmission Through Simulated Cirrus Clouds. Storming Media, 2001.

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Laser beam propagation through inhomogeneous media with shock-like profiles: Modeling and computing. [Cleveland, Ohio]: National Aeronautics and Space Administration, Lewis Research Center, 1997.

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Book chapters on the topic "Through transmission laser welding"

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Ghosh, Rituparna. "Parametric study of through transmission laser welding with teaching learning based optimization." In Artificial Intelligence and Speech Technology, 247–54. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003150664-28.

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Kumar, Nitesh, Nikhil Kumar, and Asish Bandyopadhyay. "The Effect of Process Parameters on Pulsed Through Transmission Laser Welding of Acrylic and Polycarbonate Sheets." In Advances in Simulation, Product Design and Development, 521–29. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9487-5_43.

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Rol, P., P. Niederer, and F. Fankhauser. "High-Power Laser Transmission through Optical Fibers Applications to Ophthalmology." In Laser Applications in Medicine and Biology, 141–98. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4899-1704-1_4.

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Bergheau, J. M., D. Pont, and J. B. Leblond. "Three-Dimensional Simulation of a Laser Surface Treatment Through Steady State Computation in the Heat Source’s Comoving Frame." In Mechanical Effects of Welding, 85–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84731-8_8.

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Hopmann, Christian, Simon Bölle, and Lorenz Reithmayr. "Prediction of the Bond Strength of Thermoplastics Welded by Laser Transmission Welding." In Advances in Polymer Processing 2020, 247–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-60809-8_20.

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Acherjee, Bappa, Arunanshu S. Kuar, Souren Mitra, and Dipten Misra. "Study of Laser Transmission Welding Process Using a Volumetric Heat Source Model and Experimental Analysis." In Lecture Notes in Mechanical Engineering, 23–32. New Delhi: Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2740-3_3.

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Brosda, Maximilian, Phong Nguyen, Alexander Olowinsky, and Arnold Gillner. "Investigations on the Influence of Beam Shaping in Laser Transmission Welding of Multi-layer Polymer Films with Wavelength-Adapted Diode Laser Beam Sources." In Advanced Structured Materials, 91–100. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2957-3_7.

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Yusof, M. F. M., M. Ishak, M. N. Salleh, and M. F. Ghazali. "Defect Identification During Pulse Mode Laser Welding Process Through the Pattern Recognition Analysis of the Acquired Sound Frequency Spectrum." In Technological Advancement in Mechanical and Automotive Engineering, 793–802. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1457-7_60.

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Jones, I. "Transmission laser welding strategies for medical plastics." In Joining and Assembly of Medical Materials and Devices, 344–71. Elsevier, 2013. http://dx.doi.org/10.1533/9780857096425.3.344.

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Haberstroh, E., and W. M. Hoffmann. "Laser transmission welding of micro plastics parts." In 4M 2006 - Second International Conference on Multi-Material Micro Manufacture, 71–74. Elsevier, 2006. http://dx.doi.org/10.1016/b978-008045263-0/50016-7.

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Conference papers on the topic "Through transmission laser welding"

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Shi, Larry, Sean Flowers, Marc St John, and Candice Mehmetli. "Through transmission laser welding of polyurethane films." In PICALO 2008: 3rd Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication. Laser Institute of America, 2008. http://dx.doi.org/10.2351/1.5056995.

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Bates, Philip J., Gene Zak, and Xiaochao Cao. "Weld Read-Through Defects in Laser Transmission Welding." In SAE 2011 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2011. http://dx.doi.org/10.4271/2011-01-0476.

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Ilie, Mariana, Jean-Cristophe Kneip, Simone Mattei, and Alexandru Nichici. "Effects of laser beam scattering on through-transmission welding of polymers." In ICALEO® 2005: 24th International Congress on Laser Materials Processing and Laser Microfabrication. Laser Institute of America, 2005. http://dx.doi.org/10.2351/1.5060517.

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Ilie, Mariana, Jean-Cristophe Kneip, Simone Mattei, and Alexandru Nichici. "Through-transmission welding of polymers: Effects of particles on laser beam scattering." In ICALEO® 2006: 25th International Congress on Laser Materials Processing and Laser Microfabrication. Laser Institute of America, 2006. http://dx.doi.org/10.2351/1.5060837.

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Ghosh, Rituparna. "Parametric Study of Through Transmission Laser Welding using Particle Swarm Optimization." In 2021 6th International Conference on Inventive Computation Technologies (ICICT). IEEE, 2021. http://dx.doi.org/10.1109/icict50816.2021.9358785.

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Cosson, Benoit, André Chateau Akué Asséko, and Myriam Dauphin. "Through-transmission laser welding of glass fibre composite: Experimental light scattering identification." In PROCEEDINGS OF THE 21ST INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2018. Author(s), 2018. http://dx.doi.org/10.1063/1.5034976.

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Ellis, J., M. Marcus, and M. Nitsch. "Through Transmission Laser Welding of PPS and PEI Continuous Fiber Reinforced Thermoplastic Composites." In CAMX 2022. NA SAMPE, 2022. http://dx.doi.org/10.33599/nasampe/c.22.0017.

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Rudrapati, Ramesh, Nikhil Kumar, and Pradip Kumar Pal. "Application of Taguchi method for parametric optimization of through transmission laser welding of acrylic plastics." In PROCEEDINGS OF THE 3RD INTERNATIONAL CONFERENCE ON AUTOMOTIVE INNOVATION GREEN ENERGY VEHICLE: AIGEV 2018. Author(s), 2019. http://dx.doi.org/10.1063/1.5085584.

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Mayboudi, L. S., A. M. Birk, G. Zak, and P. J. Bates. "Thermal Imaging Studies and 3-D Thermal Finite Element Modeling of Laser Transmission Welding of a Lap-Joint." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13780.

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Abstract:
Laser transmission welding (LTW) is a relatively new technology for joining plastic parts. This paper presents a three-dimensional (3-D) transient thermal model of LTW solved with the finite element method (FEM). A lap-joint geometry was modelled for unreinforced nylon 6 specimens. This thermal model addressed the heating and cooling stages in a laser welding process with a stationary laser beam. This paper compares the temperature distribution of a lap-joint geometry exposed to a stationary diode laser beam, obtained from 3-D thermal modelling with thermal imaging observations. It is shown that the thermal model is capable of accurately predicting the temperature distribution when laser beam scattering during transmission through the polymer is included in the model. The weld dimensions obtained from the model have been compared with the experimental data and are in good agreement.
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Kowalski, Gregory J., and Richard A. Whalen. "Numerical Simulation of Thermal Stress Fields in Thermoplastics in a Pulsed Laser Welding Process." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-43678.

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A numerical simulation code is developed and used to derive relationships between the incident laser radiation, the thermal stress field, and the size and shape of the heat affected (HAZ) and melt zones for a pulsed laser transmission welding process. The material used in the investigation is a high density polyethylene thermal plastic. The numerical model uses the Fourier heat conduction thermal model and the welding process involves the lap welding of two thin layers of thermoplastic films with the welding conditions of a transparent material over a semi-transparent or opaque material. The Fourier model is valid due to the high thermal pulse velocity through the material. The results are compared to the published data on thermoplastic welding criteria and the legitimacy of these criteria are discussed.
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Reports on the topic "Through transmission laser welding"

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Liou, Kuo-Nam. Laser Transmission Through Cirrus Clouds. Fort Belvoir, VA: Defense Technical Information Center, May 2004. http://dx.doi.org/10.21236/ada423867.

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Alexander, Dennis R., Jianchao Li, Haifeng Zhang, and David Doerr. Transmission Measurements of Femtosecond Laser Pulses Through Aerosols. Fort Belvoir, VA: Defense Technical Information Center, December 2003. http://dx.doi.org/10.21236/ada419719.

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