Relevant bibliographies by topics / Grinding, Finite Element Method, Residual Stresses

Academic literature on the topic 'Grinding, Finite Element Method, Residual Stresses'

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Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Grinding, Finite Element Method, Residual Stresses"

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Jafarpour, Vahid, and Rasoul Moharrami. "Numerical Stress Analysis of Creep-Feed Grinding Through Finite Element Method in Inconel Alloy X-750." Mapta Journal of Mechanical and Industrial Engineering (MJMIE) 6, no. 01 (March 23, 2022): 1–9. http://dx.doi.org/10.33544/mjmie.v6i01.187.

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The present study developed a 2D finite element model for simulation of creep-feed grinding process. Fully-coupled mechanical-thermal analysis was used to predict the residual stresses distribution. As in the creep-feed grinding the thermal damages are considerable, so the best and worst cooling condition i.e. flood and dry grindings were studied. Convection heat transfer coefficient was utilized to shows the effect of coolant. The results show the maximum temperature of specimen has reduced by about 52% compared to non-use of coolant. The dominate residual stresses are tensile near the surface that a steep decline in stresses was observed in flood grinding. Also, by using the electro polishing layer removal technique the non-uniform residual stresses were measured to validate the model. The results demonstrated the presented model provides good congruency with the experiments
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Liu, Yue Ming, Ya Dong Gong, Wei Ding, and Ting Chao Han. "Simulation and Experiment on the Residual Stress in Super-High Speed Grinding." Advanced Materials Research 135 (October 2010): 238–42. http://dx.doi.org/10.4028/www.scientific.net/amr.135.238.

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In this paper, effective finite element model have been developed to simulation the plastic deformation cutting in the process for a single particle via the software of ABAQUS, observing the residual stress distribution in the machined surface, the experiment of grinding cylindrical workpiece has been brought in the test of super-high speed grinding, researching the residual stress under the machined surface by the method of X-ray diffraction, which can explore the different stresses from different super-high speed in actual, and help to analyze the means of reducing the residual stresses in theory.
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Qiao, Y. P., Ren Ke Kang, Zhu Ji Jin, and Dong Ming Guo. "The Characteristics of Surface Residual Stresses by Plane Grinding Invar and the Effects of Them on Structural Stability." Advanced Materials Research 53-54 (July 2008): 293–98. http://dx.doi.org/10.4028/www.scientific.net/amr.53-54.293.

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Invar 36 alloy is widely used in manufacturing instruments because of its minimal thermal expansion coefficient. As an important material for the components of precision or super-precision instruments, the process methods for Invar and the structure stability after its machining is necessary. In this paper, the residual stresses of the Invar samples after plane grinding were measured. The experimental results indicate that clear tension stress exists in the surface of Invar alloy along the grinding direction, while, on the cross direction, the states of surface residual stresses are complicated and affected by the parameters of grinding. A typical disk model has been calculated and analyzed by Finite Element Method (FEM), and the deformation caused by surface residual stress was presented. Finally, the effect of grinding as final working procedure on the stability of Invar structure was estimated.
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Prakash, Marimuthu K., Kumar C. S. Chethan, and Prasada H. P. Thirtha. "Residual Stresses Modelling of End Milling Process Using Numerical and Experimental Methods." Materials Science Forum 978 (February 2020): 106–13. http://dx.doi.org/10.4028/www.scientific.net/msf.978.106.

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Machining has been one of the most sort of process for realizing different products. It has significant role in the value additions process. Machining is one of the production process where material is removed from the parent material to realize the final part or component. Among machining, the well known machining processes are turning, milling, shaping, grinding and non-conventional machining processes like electric discharge machining, ultrasonic machining, chemical machining etc. The fundamental of all these processes being material removal in the form of chips using a tool either in contact or not in contact. In the present work, milling is being taken for study Finite element analysis is being used as a tool to understand the different phenomenon that underlies the machining processes. Of late, the machining induced residual stresses is of great interest to the researchers since the residual stresses have an impact on the functional performances. The present work is to model the milling process to predict the forces and residual stresses using finite element method. Unlike many researchers, the authors have attempted to develop oblique cutting model rather than an orthogonal cutting model. The present work was carried out on AISI 1045 steel.
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Schieber, C., M. Hettig, M. F. Zaeh, and C. Heinzel. "3D modeling and simulation of thermal effects during profile grinding." Production Engineering 14, no. 5-6 (September 15, 2020): 655–65. http://dx.doi.org/10.1007/s11740-020-00983-8.

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AbstractA new heat transfer model for profile grinding was developed to analyze distortions caused by residual tensile stresses in linear guide rails. The simulative analysis of the thermal effects caused by a non-uniform heat source on the surface using the finite element method depends on an accurate representation of the locally variable contact area. The complexity of the V-groove profile disqualifies a 2-dimensional simulation approches so far used in the literature. This paper focuses on the redefinition of these mathematical relationships of the process parameters and the resulting heat flux. The heat flux model is adapted to the geometry of the workpiece depending on the grinding parameters and approximating the V-groove of a linear guide rail. This 3-dimensional modeling allows a better understanding of the thermo-metallurgical effects that occur during the grinding process. Furthermore, the calculation of the internal stresses induced into the workpiece material through the grinding process is possible. The simulation model results in a generally valid model for the analysis of distortions. In order to confirm the validity of the new heat flux profile, a comparison of the different finite element simulation results was made and experiments under wet grinding conditions were conducted. The results show that the newly developed grinding process model allows a more accurate prediction of workpiece distortion caused by grinding forces and temperatures. This research also offers a new approach to a method based on a 2-dimensional implementation developed in the literature for predicting the distortions of linear guide rails and a derivation of possible simulation-based compensation strategies.
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Schieber, Christian, Matthias-Alexander Hettig, F. Michael Zäh, and Carsten Heinzel. "Verzugskompensation beim Schleifen/Distortion compensation during grinding. Computer-aided modelling of distortion compensation strategies." wt Werkstattstechnik online 110, no. 03 (2020): 159–65. http://dx.doi.org/10.37544/1436-4980-2020-03-75.

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Der Schleifprozess ist bedeutend für die Endbearbeitung von Bauteilen und erzeugt hohe Oberflächengüten. Durch die Wärmeentwicklung an der geschliffenen Oberfläche können Zugeigenspannungen in das Bauteil eingebracht werden, welche wiederum in Bauteilverzügen resultieren. Zur Abbildung dieser unerwünschten Eigenschaften werden im Folgenden mittels der Finite-Elemente-Methode Wirkmechanismen im Bauteil modelliert. Auf Basis der Simulationsergebnisse können nachfolgend mechanische und thermische Richtprozesse ausgelegt werden.   The grinding process is a significant finishing process for components and allows for high surface quality. Due to the heat development at the ground surface, tensile residual stresses may be induced into the component, which in turn result in component distortions. In order to determine these unwanted properties, the research work presented here uses the finite element method to model mechanisms of action within the component. Using the simulation results, mechanical and thermal straightening processes can be designed.
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Dogan, Gures, Ilhan Mehmet, Dragoş Florin Chitariu, Cătălin Gabriel Dumitraş, and Vasile Ionuţ Crîşmaru. "FEA Modelling of the Combined Hard TurningRolling Process Used at Bearing Rings." MATEC Web of Conferences 343 (2021): 02004. http://dx.doi.org/10.1051/matecconf/202134302004.

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In general, the production of bearings is a very large series production, which is why in production the technological lines are designed to process a single size of bearings. Changing the production line for different types of bearings is expensive and time consuming, especially where grinding and honing processes are required. An alternative to these abrasive processes is hard turning. The literature indicates that due to highprecision machines, the accuracy of hard-turned parts is comparable to grinding processes. It is also indicated that the integrity of the surface and the topography of the surface together with the residual induced stresses are parameters of interest and that influence the performance of the bearings. So one method of increasing the durability of the bearings is to ensure a low roughness of the elements and high residual induced stresses. Deep rolling is considered as an alternative to honing and rectification processes. Rolling can induce higher surface stresses in the material compared to honing and grinding. The present paper proposes a combined cutting tool made of a hard turning head and a rolling cutting tool for machining bearing rings. A simulation of this combined process is performed with the help of the finite element and thus the internal stress field, the temperature fieldand the topography of the processed surface aredetermined.
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Duscha, Michael, Atilim Eser, Fritz Klocke, Christoph Broeckmann, Hagen Wegner, and Alexander Bezold. "Modeling and Simulation of Phase Transformation during Grinding." Advanced Materials Research 223 (April 2011): 743–53. http://dx.doi.org/10.4028/www.scientific.net/amr.223.743.

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The grinding process is one of the most important finishing processes in production industry. During the grinding process the workpiece is subjected to mechanical and thermal loads. They can induce thermal damages in terms of phase transformation due to critical temperature history. A holistic model helps to describe and predict the influence of these loads on the residual stresses in the surface layer. In this paper, a very promising approach using the Finite Element Method (FEM) to simulate the surface grinding process in terms of thermal and mechanical loads during grinding of hardened and tempered steels with vitrified bonded CBN grinding wheels is introduced. The investigations were conducted for deep, pendulum and speed stroke grinding. The change of workpiece material properties was modelled as a function of temperature and phase history. The results lead to the necessary time depending temperature distribution within the surface layer. Hence, the phase transformation can be calculated. The FEM software "Sysweld" was used to analyze the phase transformation kinetics. Hence, the size of the rehardened zone after grinding can be predicted. The evaluation of the FEM model with micrographs of ground workpiece specimens showed a strong correlation for different grinding parameters. Based on the understanding of mechanical and thermal loads as well as phase transformation kinetics in the surface layers the resulting residual stresses can be determined.
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BAHÇE, Erkan, M. Sami GÜLER, and Ender EMİR. "Investigation of Surface Quality of CoCrMo Alloy Used in the Tibial Component of the Knee Prosthesis According to the Methods of Turning and Turning-Grinding." Materials Science 26, no. 1 (August 16, 2019): 41–48. http://dx.doi.org/10.5755/j01.ms.26.1.21729.

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CoCrMo alloys, which are well-known Co-based biomedical alloys, have many different types of surface integrity problems reported in literature. Residual stresses, white layer formation and work hardening layers are some those, matters which occur as a microstructural alteration during machining. Therefore, such problems should be solved and surface quality of end products should be improved. In this paper, the surface quality of CoCrMo alloy used in tibial component of the knee prosthesis produced by means of turning was investigated. An improvement was suggested and discussed for the improvement in their machinability with the developed turning-grinding method. Finite element analyses were also carried out to calculate temperature and thermal stresses distribution between the tool and the tibial component. The results showed that many parameters such as cutting speed, feed rate, depth of cut, tool geometry, and tool wear affect the surface quality of workpieces of CoCrMo alloy. In the turning-grinding method, the machining time is reduced by about six times compared to machining only method. The EDX analysis performed on the surface after machining showed that metal diffusion occurred from tool to the tibial component.
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Kohls, Ewald, Carsten Heinzel, and Marco Eich. "Evaluation of Hardness and Residual Stress Changes of AISI 4140 Steel Due to Thermal Load during Surface Grinding." Journal of Manufacturing and Materials Processing 5, no. 3 (July 5, 2021): 73. http://dx.doi.org/10.3390/jmmp5030073.

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During surface grinding, internal material loads are generated, which take effect on the surface and subsurface zone of AISI 4140 steel. High thermal loads can result in specific material modifications, e.g., hardness reduction and tensile residual stresses, due to inappropriate combinations of system and process parameters which influence the functional performance of the ground component in a negative way. In order to avoid this damaging impact due to the thermal effect, an in-depth understanding of the thermal loads and the resulting modifications is required. This relationship is described in the concept of Process Signatures applied in this paper. Experimentally determined temperature-time histories at various depths below the surface were used to estimate the thermal loads at the surface and subsurface using a numerical approach based on the finite element method (FEM). The results show that the hardness change during surface grinding correlates with the maximum temperature rate at given maximum temperatures. In addition, correlations between the hardness change and the Hollomon–Jaffe parameter are identified, taking into account both the absolute temperature and its evolution over time. Furthermore, it was shown that the surface residual stresses correlate with the maximum local temperature gradients at the surface if no detectable tempering of the microstructure takes place.
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Dissertations / Theses on the topic "Grinding, Finite Element Method, Residual Stresses"

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Mahdi, Mofid. "A NUMERICAL INVESTIGATION INTO THE MECHANISMS OF RESIDUAL STRESSES INDUCED BY SURFACE GRINDING." University of Sydney, Mechanical, 1998. http://hdl.handle.net/2123/413.

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Abstract Grinding introduces unavoidable residual stresses of significant but unknown magnitudes. The effect of residual stresses in surface integrity is related to the nature of the residual stresses which relies purely on the process parameters and the workmaterial properties. It is a well-known fact that the fatigue strength of a ground component is increased by introducing compressive stresses. On the other hand, fatigue cracks may originate at regions of maximum tensile stress and usually at the surface of the material. Moreover, stress corrosion cracking is another consequence of critical surface tensile stress. Added to that, the residual stresses may result in dimension alteration and surface distortion, particularly for thin products such as plates. The beneficial effects of compressive residual stresses have been widely recognized in industry. The wise application of such a principle would bring about improved economical use of parts subjected to fatigue loading and aggressive environmental conditions. Therefore a better understanding of residual stress mechanisms is necessary to increase the dimensional accuracy and improve the surface integrity of ground elements, particularly for parts with high precision and manufactured by automated production lines. Consequently, the development of reliable models for predicting residual stresses is of great value in reducing the amount of measurements and experimental tests of residual stresses. Unfortunately, little effort has been devoted so far to develop appropriate models to take into account grinding conditions, workmaterial properties and boundary conditions. This thesis aims to investigate the residual stress mechanisms induced by grinding in terms of grinding parameters. In order to obtain a full understanding, both the roles of individual factors causing residual stresses (i.e. mechanical, thermal and phase transformation) and their couplings were carefully studied with the aid of the finite element method. The studies include: (1) residual stresses due to thermal grinding conditions, (2) residual stresses due to iso-thermal mechanical grinding conditions, (3) coupling of thermo-mechanical conditions, (4) coupling of thermo-phase transformation, and (5) the full coupling of all the factors. It is found that under sole thermal grinding conditions, the heat flux associated with up-grinding may lead to a higher grinding temperature compared with that of down-grinding. A constant flux introduces the least temperature rise if the total grinding energy is the same. Higher convection heat transfer not only decreases the grinding temperature but also makes the temperature rise occur mainly within a thin surface layer. A similar effect can be achieved by applying higher table speeds. When the grinding temperature is less than the austensing temperature, surface residual stresses are tensile. The heat generated within the grinding zone causes a very non-uniform temperature field in the workpiece. The part of the workmaterial subjected to a higher temperature rise expands more significantly and causes compressive stresses because of the restraint from its surrounding material that expands less. When the surface heat flux moves forward, the material outside the grinding zone contracts under cooling. Since the workmaterial has been plastically deformed during thermal loading, the contraction is restrained and thus a tensile stress field is generated locally. If a workpiece material experiences a critical temperature variation in grinding, phase transformation takes place and a martensite layer appears in the immediate layer underneath the ground surface. It was found that the growth of martensite develops a hardened zone with a higher yield stress that expands with the movement of the heat flux. A tensile surface residual stress is then developed. When the volume growth of material takes place during phase change, compressive residual stresses may also be generated. Under iso-thermal grinding conditions, it was found that plane stress is mainly compressive regardless of the distribution of surface traction and the direction of the tangential grinding force. With up-grinding, the residual stress in the grinding direction is always tensile. However, down-grinding may yield compressive surface residual stresses if the magnitude of the ratio of horizontal to vertical grinding forces is sufficiently large. Moreover, it is noted that discrete surface traction, which is more reasonable in terms of simulating the individual cutting of abrasive grits, would bring about more complex residual stress distribution that is very sensitive to the combined effect of individual cutting grits. If thermal and mechanical grinding conditions are coupled, a state free from residual stresses may be achieved if grinding heat is low and either the convection heat transfer or the table speed is high. However, it is found that the full coupling of the mechanical deformation, the thermal deformation and deformation by phase change results in tensile residual stresses. The effects of cooling and mechanical traction in this case however are minor. In summary, the research of this thesis explored the following: (a) grinding temperature development in terms of a wide range of grinding parameters together with the effect of temperature-dependent material properties, (b) the origin and onset of irreversible deformation due to mechanical loading, thermal loading and phase change under critical grinding conditions, (c) the effects of individual residual stress mechanisms and their partial and full couplings, and (d) the selection of grinding conditions to achieve beneficial residual stresses. Finally, based on the new findings in this research, a more comprehensive methodology is suggested for further study.
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Shah, Syed Mushtaq Ahmed. "Prediction of residual stresses due to grinding with phase transformation." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00679816.

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Grinding is a commonly used finishing process to produce components of desired shape, size and dimensional accuracy. The ultimate goal is to have the maximum workpiece quality, minimum machining time and high economic efficiency by making a selective adaptation of the possible process strategy and chosen parameter selection. The focus of this study arose from a limitation that challenges the grinding industry. The production rate of the ground parts is generally constrained by surface topography and subsurface damage appearing as residual tensile stress, localized burns, and phase transformation induced micro and macro-cracking. This motivates the need for a reliable numerical modelling to simulate the grinding process. The numerical model sought should be able to predict not only the required grinding residual stresses but also the deformation history. The objective of this thesis is to build up a reliable finite element model for grinding-induced residual stress analysis and thus to explore thoroughly the mechanisms in terms of grinding conditions. The variations of the residual stresses and strains at integration points have been examined, and the effects of the friction coefficient (µ), Peclet number (Pe), non dimensional heat transfer coefficient (H) and different magnitudes of input heat flux (Q) on both the microstructure and the residual stress state are analyzed. Finally, based on the new findings in this research, a more comprehensive methodology is suggested for further study.
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Garza-Delgado, Abelardo. "A study of casting distortion and residual stresses in die casting." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1196175848.

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Al-Zkeri, Ibrahim Abdullah. "Finite element modeling of hard turning." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1181928433.

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Philander, Oscar. "Mathematical modelling of welding : sensitivity of residual stresses and thermal dilatations on welding parameters." Thesis, Peninsula Technikon, 1998. http://hdl.handle.net/20.500.11838/2227.

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Thesis (MTech (Mechanical Engineering))--Peninsula Technikon, 1998.
In South Africa, the determination of residual stress distribution and undesirable metallurgical phase fractions that are formed in components during welding are been dealt with in a destructive or semi-destructive manner. This dissertation is an attempt at enhancing the acquisition of residual components found in welded structures. It shows how finite element methods can be used to obtain these results. TIG welding is modeled as a thermo-mechano-metallurgical (TMM) problem. The mathematical and finite element models for welding described in this study is based on the work performed by Ronda and Oliver. These models has not yet fully been incorporated into any of the existing computational tools and therefor, a commercial computational software program, SYSWELD 2, was employed to perform the welding simulations. The Leblond material models are incorporated into this software program, and the model that is used for this study is described in this text. Computational simulations were performed to study the effects that the sensitivity of welding parameters would have on the resulting shape and size of Heat Affected Zones, depth and width of penetration, temperature fields, metallurgical solid phase fractions, as well as residual stress distribution and deformation. The results of these simulations were compared to laboratory experiments.
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Maczugowski, Maciej. "Numerical simulation of residual stresses in a weld seam : An application of the Finite Element Method." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-65867.

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Articulated haulers are fundamental equipment to transport material. The load carrying structure on a hauler consists mainly of welded frames. During welding of the frames high residual stress will be introduced. These stresses may have a significant impact on the fatigue life of the frames. This is the reason for having good knowledge of the weld residual stresses. The finite element method was used to calculate the residual stress distributions in a butt weld and a T-join weld. Simulation of the welding process with thermal and mechanical analysis was prepared by means of welding GUI implemented in LS-PrePost. The welding simulation is a computer intensive operation with high CPU time. That is why it is important to investigate which process factors that have the largest impact on welding simulation results. The aim of this thesis is to investigate the correlation between designed models in FEA software with published results of weld residual stress measurements and conclude which parameters should be mainly taken into consideration.
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Badr, Elie Antoine. "Estimation of residual stresses induced by autofrettage with an experimental evaluation of the autofrettage process in crossbores of positive displacement pumps /." Access abstract and link to full text, 1994. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9500703.

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Liou, Jiann-Haw. "Study of stress developments in axi-symmetric products fabricated by forging and machining /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9737869.

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Long, Xin. "Finite element analysis of residual stress generation during spot welding and its affect on fatigue behavior of spot welded joints." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4171.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2005.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (November 13, 2006) Vita. Includes bibliographical references.
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Awang, Mokhtar. "The effects of process parameters on steel welding response in curved plates." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2682.

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Thesis (M.S.)--West Virginia University, 2002.
Title from document title page. Document formatted into pages; contains xiv, 133 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 83-85).
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Books on the topic "Grinding, Finite Element Method, Residual Stresses"

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Cecot, Witold. Analysis of selected in-elastic problems by h-adaptive finite element method. Kraków: Wydawn. PK, 2005.

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Ghosn, Louis J. Residual stresses in thermal barrier coatings for a Cu-8Cr-4Nb substrate system. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2002.

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Mital, Subodh K. Fiber pushout test: A three-dimensional finite element computational simulation. [Washington, D.C.]: NASA, 1990.

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Center, Langley Research, ed. Thermal residual stresses in silicon-carbide/titanium [0/90] laminate. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1992.

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V, Raj Sai, and NASA Glenn Research Center, eds. Residual stresses in thermal barrier coatings for a Cu-8Cr-4Nb substrate system. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2002.

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Book chapters on the topic "Grinding, Finite Element Method, Residual Stresses"

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Hołowinski, M., and J. Orkisz. "Hybrid finite element method for estimation of actual residual stresses." In Residual Stress in Rails, 125–49. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-1787-6_7.

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Tański, Tomasz, Krzysztof Labisz, Wojciech Borek, Marcin Staszuk, Zbigniew Brytan, and Łukasz Krzemiński. "Application of the Finite Element Method for Modelling of the Spatial Distribution of Residual Stresses in Hybrid Surface Layers." In Mechanical and Materials Engineering of Modern Structure and Component Design, 51–69. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19443-1_5.

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Werke, Mats, Peter Ottosson, Daniel Semere, and Filmon Yacob. "Prediction of Residual Stresses in Components Using the Contour Method." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220135.

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During machining the accumulated bulk stresses induced by previous shape forming process steps, such as forging, casting or additive manufacturing and subsequent heat treatment, will be released and cause undesirable geometry errors on the final component. By considering the residual stresses during process planning a significant improvement in dimensional accuracy can be achieved. This paper presents experiences for prediction of residual stresses for components with complex geometries using the Contour method. Three sectioning procedures have been tested and a cutting strategi using Electric Discharge Machining with slow feed rate and cutting from two sides with final cut in the middle is proposed. Two Finite Element modelling strategies for 3D-models have been tested and a meshing strategy based on extrusion of the geometry from the cut plane is recommended. Further, a procedure to automate the Finite Element meshing of complex structures using the Alpha Shape algorithm is proposed. The ambition is to integrate this algorithm in procedures for automatization of the entire analysis.
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Jahanian, Shahriar. "Quenching of Aluminum Solid Cylinder: Numerical Study." In Encyclopedia of Aluminum and Its Alloys. Boca Raton: CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000388.

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A numerical method is presented for evaluating the residual stress distribution in a long aluminum solid cylinder subjected to rapid cooling. An analytical model is developed for the temperature distribution. For the boundary conditions, experimental data for the outer surface of the cylinder are used, and a reasonable agreement between the predicted temperature distribution at the center of the cylinder and the experimental data is observed. For the numerical analysis, a quasi-static, uncoupled thermoelastoplastic analysis, based on a hyperbolic sine law, is presented. The numerical results are presented for the temperature distribution as well as the thermoelastoplastic stress distribution in a solid cylinder with temperature-dependent properties. The residual stress distribution is compared with the results of other investigators who used the Finite Element Method, and a reasonable agreement between our results and previous results is observed. The conclusion is reached that the temperature dependency of the yield stresses and the problem of post-yielding are two important factors to be considered when developing a model for predicting the residual stresses in quenched bodies.
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Ma, Shuai, Dingxi Xue, Qiangqiang Li, Guojun Li, and Chongyang Feng. "Residual Stress Analysis of Solid Oxide Fuel Cells with Functional Gradient Material Electrodes." In Advances in Energy Research and Development. IOS Press, 2022. http://dx.doi.org/10.3233/aerd220005.

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In this paper, an anode and cathode material scheme with a continuous gradient variation of components is presented. The residual stress distribution of each part of the electrode model under the new material structure is derived by calculating the residual stress during the sintering process, and the optimal material component distribution curve is derived from the analysis of the results. A multi-physics 3D model covering heat transfer, mass transfer, flow, electrochemistry and solid mechanics is developed with the help of the finite element analysis software COMSOL Multiphysics 5.5. Simulation experiments are conducted to verify the effectiveness of the method for mitigating thermal stress mismatch, reducing residual stresses and increasing the working life of the fuel cell. The results show that the use of functional gradient materials for one side electrode significantly reduces the residual stresses generated in the other side electrode during sintering, and the effect of the sinusoidal distribution curve is the most significant. The stress concentration at the electrode-electrolyte interface can be improved when both side electrodes are used with functional gradient materials at the same time, and the sinusoidal and primary linear distributions are more effective.
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Conference papers on the topic "Grinding, Finite Element Method, Residual Stresses"

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Szydlowski, Wieslaw M., William N. Weins, Shiva Kumar Gumate, and Arun Dhir. "Evaluation of Residual Stresses in Axisymmetric Bodies from Post-Grinding Deformation by Finite Element Method." In Aerospace Technology Conference and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1992. http://dx.doi.org/10.4271/922034.

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Boucly, V., and D. Ne´lias. "Proposal of a Method to Predict Grinding Stresses." In STLE/ASME 2008 International Joint Tribology Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/ijtc2008-71239.

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Residual stresses due to machining are the results of the thermo-mechanical history of the piece/tool interface. The magnitude and the gradient of stress play a key role for the surface integrity. A thermo-mechanical model has been developed. It allows simulating the rolling/sliding contact between an elastic tool in rotation along its own axis and an elastic-plastic flat in translation. The analysis includes the effects of both the normal and tangential loading. Frictional heating is also considered. The model is based on a semi-analytical method and the transient 3D contact problem is fully solved. Compared to the finite element method the computing time is reduced by several orders of magnitude. This technique has already been successfully applied to the simulation of running-in and wear, and to fretting wear, and a first attempt to simulate residual stress and strain due to the contact between a grinding tool and a work piece is made here. First results are presented for various stationary and transient thermo-mechanical loading histories.
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O¨zel, Tugrul, and Erol Zeren. "Finite Element Modeling of Stresses Induced by High Speed Machining With Round Edge Cutting Tools." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81046.

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High speed machining (HSM) produces parts with substantially higher fatigue strength; increased subsurface micro-hardness and plastic deformation, mostly due to the ploughing of the cutting tool associated with residual stresses, and can have far more superior surface properties than surfaces generated by grinding and polishing. In this paper, a dynamics explicit Arbitrary Lagrangian Eulerian (ALE) based Finite Element Method (FEM) modeling is employed. FEM techniques such as adaptive meshing, explicit dynamics and fully coupled thermal-stress analysis are combined to realistically simulate high speed machining with an orthogonal cutting model. The Johnson-Cook model is used to describe the work material behavior. A detailed friction modeling at the tool-chip and tool-work interfaces is also carried. Work material flow around the round edge-cutting tool is successfully simulated without implementing a chip separation criterion and without the use of a remeshing scheme. Finite Element modeling of stresses and resultant surface properties induced by round edge cutting tools is performed as case studies for high speed machining of AISI 1045 and AISI 4340 steels, and Ti6Al4V titanium alloy.
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Youssef, Sawsen, Olivier Calonne, and Hédi Hamdi. "Influence of Hand Disc Grinding on Surface Integrity of Nickel-Based Alloys: Numerical Approach." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97974.

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For complex part geometry, hand grinding is one of finishing and super finishing process the most used in mechanical industry. Surface integrity is today one major concern for industrials. The surface integrity is defined by a set of important characteristics of ground surface as surface geometric parameters (roughness, …), mechanical behaviour of the subsurface (hardness, residual stress, …) and structural changes of the material in the near surface. High heat and pressure, high strain and strain rate observed during hand grinding process, strongly influence surface integrity. Therefore, the surface behaviour, in terms of resistance to corrosion and crack initiation depends on how the process was conducted. The purpose of this study is to understand the effects of thermal and mechanical plastic deformation induced on the surface of components. The action of the disc-grinding wheel on the workpiece is modelled by a moving heat flux on the surface. The challenge is to be able to find the shape and intensity of thermomechanical load entering the workpiece in accordance with the hand disc grinding process and taking into account specific parameters of the process. In a first part, a mechanical description of the action of the disc-wheel on the surface is proposed in order to develop an analytic formulation of the grinding power and the heat flux density. They are function of the disc-grinding wheel velocity, the feed speed and the applied forces. This expression is then used in a finite element modelling to perform thermomechanical simulations of the hand disc-grinding process. In a first stage, heating and cooling are computed. They give maximum temperature reached, temperature gradients and cooling kinematic. In a second stage, thermomechanical computation is conducted in order to compute residual stresses induced by this abrasion process. A discussion based on experimental results obtained by XRD method is then proposed and some local explanation are given on the way the material structure has changed leading to a structural hardening in the 50 first microns beneath the ground surface.
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Armentani, Enrico, Renato Esposito, and Raffaele Sepe. "Finite Element Analysis of Residual Stresses on Butt Welded Joints." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95125.

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Localized heating during welding, followed by rapid cooling, usually generates residual stresses in the weld and in the base metal. Residual stresses in welding processes give significant problems in the accurate manufacture of structures because those stresses heavily induce the formation of cracks in the fusion zone in high strength steels. Therefore, estimating the magnitude and distribution of welding residual stresses and characterizing the effects of certain welding conditions on the residual stresses are deemed necessary. In this work, residual stresses and distortions on butt welded joints are numerically evaluated by means of finite element method. The FE analysis allows to highlight and evaluate the stress field and his gradient around the fusion zone of welded joints, higher than any other located in the surrounding area. Temperature-dependent material properties, welding velocity, external mechanism constraints, technique of ‘element birth and death’ and latent heat of fusion are also taken into account. Some numerical results are compared with experimental data showing a very good correlation.
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Mathew, Jose, Allesu K., Shravani Srisailam, K. P. Somashekhar, Prakash Naidu P., and P. S. Suvin. "Estimation of Residual Stresses and Crater Shape in µ-EDM by Finite Element Method." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-86100.

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Micro-Electric Discharge Machining (μ-EDM) is the process of machining electrically conductive materials in the form of micro-size craters by using precisely controlled sparks that occur between tool electrode and workpiece in the presence of dielectric fluid. The present paper attempts to predict the accurate model for thermal behavior of the EDM process on commercially available Inconel 718. The temperature gradients are crucial in identifying the zones of high temperature and high residual stresses. 3-Dimensional, transient coupled (structural and thermal) analysis is modeled for Inconel 718 workpiece material to estimate the residual stresses due to spark erosion and also to study the crater morphology. The residual stresses are higher at the centre of the crater and it is decreasing when move far from the centre. The simulated results are compared with the experimental results. Both the experimental and the simulated results are in good agreement.
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Marusich, T. D., S. Usui, and R. J. McDaniel. "Three-Dimensional Finite Element Prediction of Machining-Induced Stresses." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42329.

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Controlling residual stress in machined workpiece surfaces is necessary in situations where service requirements subject structural members to cyclic fatigue loading. It is desirable to have a predictive capability when attempting to optimize machined parts for cost while taking into account residual stress considerations. One such method of machining modeling is application of the finite element method (FEM). A three-dimensional FEM model is presented which includes fully adaptive unstructured mesh generation, tight thermo-mechanically coupling, deformable tool-chip-workpiece contact, interfacial heat transfer across the tool-chip boundary, momentum effects at high speeds and constitutive models appropriate for high strain rate, finite deformation analyses. The FEM model is applied to nose turning operations with stationary tools. To substantiate the efficacy of numerical and constitutive formulations used, metal cutting tests are performed, residual stress profiles collected, and validation comparison is made.
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Zhu, Xian-Kui. "Determination of Path-Independent J-Integral for Cracks in Residual Stress Fields Using Finite Element Method." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45712.

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“Hot” residual stresses exist in metal welds due to welding thermal stresses, and “cold” residual stresses occur in mechanical damaged metallic pipes due to large plastic deformation. For a crack in ether a hot or cold residual stress field, residual stresses might have a strong effect on the crack-tip field and the fracture parameter, J-integral. To consider the effect of residual stresses and to ensure the path-independence of J, different correction methods have been developed over the years. Recently, the finite element analysis (FEA) commercial software ABAQUS adopted one of correction methods for determining the residual stress corrected J-integral. This paper intends to evaluate this new function of ABAQUS and to see if the residual stress corrected J-integral is path-independent. A brief review is first given to the J-integral definition, the conditions of J-integral path-independence or dependence, and the modifications of J-integral to consider the residual stress effect. A modified single edge-notched bend (SENB) specimen is then adopted, and a FEA numerical procedure is developed and used in the numerical tests to evaluate the path-independence of the residual stress corrected J-integral using ABAQUS. Detailed elastic-plastic FEA calculations are carried out for the modified SENB specimen in three-point bending. The residual stress field, crack-tip field, and J-integral with and without consideration of the residual stress effect are determined and discussed.
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Balusu, Kranthi, Lei Li, Kyoo Sil Choi, and Ayoub Soulami. "Coupling Smoothed Particle Hydrodynamics With Finite Element Method to Simulate Residual Stresses From Friction Stir Processing." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-93695.

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Abstract Friction stir processing (FSP) is a solid-state material processing technique that locally modifies the microstructure but also induces undesirable residual stresses. A robust numerical model for the FSP can help in mitigating these residual stresses. Heat source models within a finite element method (FEM) framework suffer from inaccuracies. In contrast, smoothed particle hydrodynamics (SPH) model that explicitly captures the material flow near the tool and the associated heat generation is accurate. However, the computational expense of SPH simulations can be prohibitive. In this work, we propose a coupled SPH-FEM framework. SPH is used to accurately model the heat generation near the tool, which is then inserted into the FEM model as a heat source. To verify this proposed coupling approach, a test case is set up with typical FSP conditions, and it is modeled in both SPH and SPH-FEM. The temperature profiles were compared after the simulations had reached steady-state temperatures. The similarity of the temperature profiles from SPH-FEM and SPH validated the proposed coupling approach. This proposed approach achieves the accuracy of the SPH method while potentially retaining the low computational expense of FEM.
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Kunaporn, Sawalee, Mamidala Ramulu, Michael G. Jenkins, and Mohammed Hashish. "Residual Stress Induced by Waterjet Peening: A Finite Element Analysis." In ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-1833.

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The concept of multiple droplet impacts resulting from ultra high-pressure waterjet (UHPWJ) was used to develop a mathematical model to describe the effect of interfacial pressure on the underlying workpiece material. A non-linear elastic-plastic finite element analysis (FEA) was carried out in this study using the interfacial pressure model to predict residual compressive stresses. This three-dimensional FEA model was based on quasi-static considerations to provide prediction of both magnitude and depth of residual stress fields in a 7075-T6 aluminum alloy (A17075-T6). Results of the FEA modeling were in good agreement with experimental measurements. Effects of applied pressures on the residual stress fields are also presented and discussed as a method of estimating high-pressure waterjet induced compressive stresses under varying process conditions for peening.
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Reports on the topic "Grinding, Finite Element Method, Residual Stresses"

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SECOND-ORDER DIRECT ANALYSIS FOR STEEL H-PILES ACCOUNTING FOR POST-DRIVING RESIDUAL STRESSES. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.349.

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"Driven steel H-piles are extensively adopted in engineering practice due to their convenience and efficiency in both economic and construction. The post-driving residual stress, a compressive axial stress distributed along the pile induced by the pile installation, might significantly deteriorate the pile bearing capacity. Thus, a large enough factor of safety is adopted in the traditional analysis to cover the influence caused by the post-driving residual stress. However, it sometimes leads to a large waste in costs and materials. Thus, the present study adopted the second-order analysis, a modern simulationbased design method, for the design of the driven steel H-pile. A robust and efficient finite element formula is necessary to conduct the second-order design method in practice. Hence, a new Line-Finite Element (LFE) formula is proposed in this paper. The developed LFE directly captures all the crucial factors in the analysis of the driven steel H pile, including the nonlinear Soil-Structure Interaction (SSI) and the post-driving residual stress. A validation example is presented at the end of this paper, which illustrates the accuracy and the computational efficiency of the proposed LFE formula."
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