Готові списки джерел за темами / Finite Rectangular Sheet

Добірка наукової літератури з теми "Finite Rectangular Sheet"

Автор: Grafiati

Опубліковано: 6 вересня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Зміст

Статті в журналах
Дисертації
Тези доповідей конференцій

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Finite Rectangular Sheet".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "Finite Rectangular Sheet"

Maji, Kuntal. "Parametric Study and Optimization of Pulsed Laser Thermal Micro-Forming of Thin Sheets." International Journal of Manufacturing, Materials, and Mechanical Engineering 9, no. 2 (April 2019): 47–61. http://dx.doi.org/10.4018/ijmmme.2019040103.

Повний текст джерела

Анотація:

This article presents the investigations on deformation behavior in precision forming of thin sheet metal by laser pulses using finite element analysis. The temperature and deformation fields were estimated and analyzed in pulsed laser micro-forming of AISI 304 stainless steel sheet of rectangular and circular shape considering the effects of different process parameters such as laser power, spot diameter and pulse on time. Response surface models based on finite element simulation results were developed to study the effects of the process parameters on deformations for the rectangular and circular workpieces. The amount of deformation was increased with the increase in laser power and pulse on time, and it was decreased with the increase in spot diameter. The effects of pulse frequency and sample size on deformations were also explained. Experiments were conducted on pulsed laser micro-forming of stainless-steel sheet to validate the finite element results. The results of finite element simulations were in good agreement with the experimental results.

Стилі APA, Harvard, Vancouver, ISO та ін.

Kim, Young Suk, Duy Tung Do, Dae Cheol Ahn, and Dong Woo Shin. "Finite Element Simulations for CFRP Press Forming Process." Key Engineering Materials 651-653 (July 2015): 415–22. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.415.

Повний текст джерела

Анотація:

The macro-scale and meso/macro-scale simulations for press forming of CFRP sheet using ABAQUS S/W were both implemented to study the influence fiber orientation on the formability of CFRP sheet. The Hashin damage criterion was used to predict the fiber failure in the forming process. The properties of plain woven fiber fabric were obtained from the tensile test and bias extension test. The forming experiments with rectangular punch were carried out to validate the numerical results.

Стилі APA, Harvard, Vancouver, ISO та ін.

Shotri, Rishabh, Koen Faes, Guillaume Racineux, and Amitava De. "Improved Coil Design for Magnetic Pulse Welding of Metallic Sheets." Journal of Manufacturing and Materials Processing 6, no. 6 (November 16, 2022): 144. http://dx.doi.org/10.3390/jmmp6060144.

Повний текст джерела

Анотація:

Magnetic pulse welding of overlapping dissimilar metallic sheets is an emerging technique and usually employs flat electromagnetic coils with rectangular-, H-, I-, and E-shaped cross-sections. The asymmetric cross-section of these coils results in a non-uniform electromagnetic field and in a non-uniform connection in the interface between the overlapping sheets. In this article, the use of a novel O-shaped flat coil is proposed to join an aluminium flyer sheet with a target steel sheet. A finite element-based numerical model is developed to calculate the electromagnetic field, flyer velocity, and its gradual impact onto the target, and the deformations of the sheet assembly. The calculated results with the O-shaped coil show a high-intensity electromagnetic field, the concentration of which decreases radially outwards in a uniform manner. The numerically computed and experimentally measured flyer velocity are found to be in fair agreement. The calculated results show a regularly decreasing impact behaviour between the flyer and target and their resulting deformation. The measured results show the formation of an annular ring-shaped joint profile that is generally found to be stronger compared to that obtained with flat coils with a rectangular cross-section.

Стилі APA, Harvard, Vancouver, ISO та ін.

Young, A., D. J. Cartwright, and D. P. Rooke. "The boundary element method for analysing repair patches on cracked finite sheets." Aeronautical Journal 92, no. 920 (December 1988): 416–21. http://dx.doi.org/10.1017/s0001924000016559.

Повний текст джерела

Анотація:

Summary The boundary element method is combined with the method of compatible deformations to obtain stress intensity factors for a cracked sheet reinforced with a repair patch. The method is applied to the analysis of a circular patch over a central crack in a rectangular uniaxially stressed sheet. It is shown that the proximity of the edges of the sheet to the patch edge has a negligible effect on the stress intensity factor of a crack completely under the patch.

Стилі APA, Harvard, Vancouver, ISO та ін.

Zhang, Ling Yun, and Song Xie. "The Numerical Simulation Analysis of the Rectangular Box Straight Springback Law." Applied Mechanics and Materials 401-403 (September 2013): 946–49. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.946.

Повний текст джерела

Анотація:

Abstract. Springback is one of the main factors that affects the quality of sheet metal deep drawing. Due to the springback is inevitable, so to explore the springback law becomes an important content in the process of sheet metal forming. In this paper, the ETA/DYNAFORM finite element software was applied to simulate four different length-width radio model of rectangular box. The simulating data shows that the rectangular box with short straight edge rebounded inward when the central of the long straight edge rebounded outward and near the corner part rebounded inward. The study had a very important guiding significance to the stamping process of rectangular box part and mold design.

Стилі APA, Harvard, Vancouver, ISO та ін.

Zhang, X. S. "A tearing mode crack located anywhere in a finite rectangular sheet." Engineering Fracture Mechanics 33, no. 4 (January 1989): 509–16. http://dx.doi.org/10.1016/0013-7944(89)90035-0.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Bunyan, Tanongsak, Suthep Yiemchaiyaphum, and Sansot Panich. "Wrinkling Prediction of Rectangular Cup Deep Drawing Process for Aluminum Alloy Sheets by Using the Modified Yoshida Buckling Test." Key Engineering Materials 856 (August 2020): 143–51. http://dx.doi.org/10.4028/www.scientific.net/kem.856.143.

Повний текст джерела

Анотація:

Nowadays, the industry has been growing interest in lightweight material for automotive and cookware manufacturing. The formability of sheet material is an important issue in these industries. The wrinkling behavior is one of the most failure in sheet metal forming and is often occurred in deep drawing process in cookware manufacturing. In this work, the developed wrinkling limit curves (WLCs) using experimental and numerical simulation of a modified Yoshida buckling test were precisely used to predict the wrinkling behavior of rectangular cup deep drawing for aluminum alloy sheets grade AA5054-O and AA5052-H32. The Industrial parts, the rectangular cup deep drawing was firstly performed for both investigated aluminum sheets for obtaining the wrinkling initiation on the side wall area of deep drawing parts. Subsequently, the experimental formed parts were carefully measured the draw-in of deformed blank sheets and drawing depth to validate the finite element (FE) model. Then, the FE simulation of the corresponding drawing tests were calculated, by which were implemented with the Hill’48 yield criterion and Swift hardening law to descript anisotropic plastic deformation. As a result, the local principle Major and Minor principle strains of observed wrinkle areas were gathered in the side wall area of the rectangular cup deep drawing test. Finally, the developed WLCs of aluminum alloy sheets were applied to predict the wrinkling formation of the formed deep drawing parts. Comparatively, the influence of different aluminum alloy grades on the WLCs and wrinkling behavior were explicitly investigated.

Стилі APA, Harvard, Vancouver, ISO та ін.

Chen, Qin, and Hui Wu. "Nonlinear Finite Element Analysis on CFRP-Confined Square Concrete Column under Cyclic Lateral Loading." Advanced Materials Research 255-260 (May 2011): 230–35. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.230.

Повний текст джерела

Анотація:

An analog computation of carbon fiber-reinforced polymer (CFRP)-confined rectangular concrete column under cyclic lateral load is carried out using the finite element method (FEM) and is compared with the experimental results. The comparison indicates that the FEM could accurately predict the behavior of CFRP-confined reinforced concrete (RC) column under cyclic lateral loading. The reinforcement mechanism of carbon fiber sheets on RC columns is studied by analyzing the results calculated with FEM such as the stress-strain of carbon fiber sheets, stirrups, and concrete. The effect of axial compression ratio and the number of layers of fiber sheet on the ultimate bearing capacity and displacement ductility of RC column are studied by the finite element analysis. Part of the conclusion, namely, the effect of the number of layers and setting height of fiber sheet on the RC column, offers the reference and basis for further engineering application. template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

Стилі APA, Harvard, Vancouver, ISO та ін.

Alves, Luis M., Rafael M. Afonso, Carlos M. A. Silva, and Paulo A. F. Martins. "Joining by Forming of Tubes to Sheets with Counterbored Holes." Key Engineering Materials 767 (April 2018): 421–28. http://dx.doi.org/10.4028/www.scientific.net/kem.767.421.

Повний текст джерела

Анотація:

This paper presents a new joining by forming process for connecting tubes to sheets. The process consists of forming an annular flange with rectangular cross section by partial sheet-bulk of the tube wall thickness and performing the mechanical interlock by upsetting the free tube end against a flat-bottomed (counterbored) sheet hole. The presentation identifies the variables and the workability limits of the process and includes an analytical model to assist readers in the design of the new joints. The new proposed joining by forming process and the corresponding analytical model are validated by experimentation and numerical simulation using finite element analysis. The process allows connecting tubes to sheets made from dissimilar materials at room temperature, avoids the utilization of addition materials or adhesives and produces joints that are easy to disassembly at the end of live, allowing recyclability of the tubes and sheets.

Стилі APA, Harvard, Vancouver, ISO та ін.

Yang, D. Y., and Y. J. Kim. "Analysis of Hydrostatic Bulging of Anisotropic Rectangular Diaphragms by the Rigid-Plastic Finite Element Method." Journal of Engineering for Industry 109, no. 2 (May 1, 1987): 148–54. http://dx.doi.org/10.1115/1.3187105.

Повний текст джерела

Анотація:

A variational formulation is derived for the incremental analysis of the nonsteady large deformation of normal anisotropic sheet metal which exhibits a rigid-plastic work-hardening behavior. The associated finite element equations are formulated for the analysis of the hydrostatic bulging process of square and rectangular anisotropic metal diaphragms. The relation between bulging pressure and deformation is studied using the finite element analysis. Instability related with the bulging deformation is analyzed by using the instability criterion for sheet metal. The effect of anisotropy on deformation and instability is investigated and discussed. The theoretical results are shown to be in excellent agreement with the existing experimental results and to be very helpful for a better understanding of the process.

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Дисертації з теми "Finite Rectangular Sheet"

Han, Wanmin. "The analysis of isotropic and laminated rectangular plates including geometrical non-linearity using the P-version finite element method." Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239415.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Khare, Ojasvi. "Edge States and Effects of Disorder in Finite Graphene Sheets." Thesis, 2017. https://etd.iisc.ac.in/handle/2005/4160.

Повний текст джерела

Анотація:

The thesis endeavours to theoretically understand electronic properties of nite trapezoidal shaped graphene sheets, and understand zero energy edge states. The motivation for this thesis is recent experimental work at Low Temperature Nano-electronics Laboratory under Prof. Arindam Ghosh[ ?]. This work sys-tematically tries to understand graphene, a two dimensional material, and it's confinement in spacial dimensions. In Part I, we start with analytical study of bulk graphene with various hoppings in a tight-binding formulation and its band structure. Then we confine graphene in one-dimension to form semi-in finite graphene nanoribbons and numerically determine its energy spectra and wave-functions for sites along the finite direction. In Part II, graphene is confined in both spacial dimensions and starting from simplest case of finite rectangular sheet, we move on to the two different ways in which graphene can be torn. Here, numerical studies were done to determine the density of states and local density of states. Finally Parts III and IV are devoted to the study of disorders and how various kinds of disorders can be introduced in the system and their effect in localising the wave-functions along the edges.

Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "Finite Rectangular Sheet"

Hiroaki, Keiichi, Masahiro Watanabe, and Ryosuke Morita. "Flutter Analysis and Experiments of a Rectangular Sheet Supported by a Wire." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45061.

Повний текст джерела

Анотація:

This paper deals with a flutter analysis of a rectangular sheet supported by a wire in axial flow. In the flutter analysis, Doublet-point method based on the unsteady lifting surface theory is used to calculate the unsteady fluid force acting on the sheet surface. The equation of motion of the sheet supported the wire with tension is derived by using the finite element method. The flutter velocity and mode of the sheet are examined through the root locus of the flutter determinant of the system with changing the flow velocity. In this study, experiments are conducted and compared with the analytical results. The flutter velocity, its mode, and the local work by the fluid force acting on the sheet surface with changing tension of wire are determined. Moreover, the effects of boundary condition on flutter characteristic are determined. As the tension of the wire becomes higher, the flutter velocity and its frequency increase. Traveling-wave mode flutter occurs to the sheet when the flow velocity becomes higher. In the case of lower tension of the wire, the amplitude of the flutter mode at the upstream end is large. The local work done by the fluid force around the center of the sheet is positive, and that near the downstream end of the sheet is negative. Moreover, local work on the sheet surface and flutter mode for different boundary condition depend on dominant mode contribute to flutter mode.

Стилі APA, Harvard, Vancouver, ISO та ін.

Zhang, Shi-Hong. "Finite Element Analysis on Warm Hydroforming of Rectangular Mg Alloy Cups with a Step Cavity." In NUMISHEET 2005: Proceedings of the 6th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Process. AIP, 2005. http://dx.doi.org/10.1063/1.2011293.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Mahajan, Peeyush, Mainak Pal, Rakesh Kumar, and Anupam Agrawal. "Experimental and Simulation Study of Incremental Forming for Titanium Grade 2 Sheet." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8524.

Повний текст джерела

Анотація:

Abstract Incremental sheet forming (ISF) process has gained massive popularity due to its die-less nature. The process shows greater flexibility in making customized sheet metal parts economically and more effectively as compared to the traditional forming processes. This paper mainly focuses on investigating the behavior of commercially pure (CP) titanium grade 2 sheet. Single point incremental forming process has been used to deform the sheet. Workpiece geometry has been chosen as conical rectangular shape, using the unidirectional spiral tool path profile. The deformation of the titanium sheet has been performed with and without the use of lubricating fluid. The finite element analysis (FEA) for the von Mises stress and sheet thickness variation has been carried out on ABAQUS® simulation software. Also, the stretching of the deformed sheet has been examined along the side wall and corner of the deformed surface. The ISF has limitation with respect to the geometrical accuracy and surface finish quality of the formed part. To study the surface quality of the deformed surface, scanning electron microscopy (SEM) has been utilized. Stress triaxiality is another important parameter to investigate the crack initiation and fracture during forming, it has been predicted using Finite element analysis.

Стилі APA, Harvard, Vancouver, ISO та ін.

Sawa, Toshiyuki, Ryo Kurosawa, and Yasuaki Tatsumi. "FEM Analysis and an Evaluation of the Sealing Performance in Flexible Box-Shape Flanged Bolted Joints With Gaskets Subjected to Internal Pressure." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14250.

Повний текст джерела

Анотація:

The contact gasket stress distributions of rectangular box-shape flange connections with compressed joint sheet gaskets subjected to internal pressure were analyzed taking account hysteresis of the gaskets using finite element method (FEM). Leakage tests were also conducted using actual rectangular box-shape flange connections with compressed joint sheet gaskets under internal pressure. By using the contact gasket stress distributions and the results of the leakage tests, the new gasket constants were calculated. The difference in the new gasket constants between the values obtained from the present study and those by the PVRC procedure was substantial. In addition, a method to determine the initial clamping bolt force (bolt preload) for a given tightness parameter was demonstrated.

Стилі APA, Harvard, Vancouver, ISO та ін.

Garci´a Zugasti, Pedro de Jesu´s, Hugo Iva´n Medelli´n Castillo, and Dirk Frederik de Lange. "A Case Study of Drawbead Design of a Deep Drawn Rectangular Part Using FEM." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11250.

Повний текст джерела

Анотація:

The deep drawing manufacturing process of sheet metal parts with complex shape has increased recently in applications such as in the automotive industry and the household appliances. The trial and error methods commonly used in defining the process parameters, cause high costs and large development times. The computer assisted analysis and simulations are being used more frequently to reduce the cost and development time of a product. The process parameters can be modified and evaluated using these computer simulations before the production is carried out. Therefore the defects of a part can be identified and eliminated, if possible, without the need of the traditional trial and error methods. This paper presents a case study of an industrial component that presented defects (wrinkles at the corners) in its deep drawing process. To eliminate these defects a drawbead was proposed and its optimal location was established using an optimization procedure based on finite element method (FEM). The FEM simulations were validated by measuring the thickness of the fabricated part. To evaluate the elimination of the wrinkle, the thickness of the sheet metal at the critical area was measured in the FEM simulation and compared with the thickness profile before and after the addition of the drawbeads. The results have shown that the design strategy based on FEM can be effectively used as a design tool to eliminate part defects in rectangular deep drawing process.

Стилі APA, Harvard, Vancouver, ISO та ін.

Menchi, Aarón Rivas, Hugo I. Medellín Castillo, Dirk F. de Lange, and Pedro de J. García Zugasti. "Influence of Geometrical Parameters on the Maximum Deep Drawing Height of Rectangular Parts." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36924.

Повний текст джерела

Анотація:

The deep drawing process is commonly used in the industry because its ability to produce parts with reduced weight and good mechanical properties at a high production rates. However, the elasto-plastic deformation mechanism of deep drawing is complex and difficult to analyse; this because there are many process parameters and variables involved that affect the quality of final products. Among these variables are the geometric parameters, which have been proved to have a great influence on the process. Theoretical and experimental analyses reported in the literature have been mainly focused on conventional cylindrical cup deep drawing. Few research works have dealt with the deep drawing analysis of non-cylindrical parts, particularly the influence of geometrical parameters on the deep drawing performance. This paper presents an analysis of the effect of geometrical parameters on the allowable deep drawing height (DDH) of rectangular parts before fracture. The aim is to identify the influence of the main geometrical parameters on the DDH, Numerical analyses based on the Finite Element Method (FEM) were used to investigate the influence of geometrical parameters, such as the radii, the metal sheet thickness, and the aspect ratio, among others, on the DDH.

Стилі APA, Harvard, Vancouver, ISO та ін.

Garci´a Zugasti, Pedro de Jesu´s, Hugo Iva´n Medelli´n Castillo, Abel Cerino Zapata, Dirk Frederik de Lange, and Antonio Ca´rdenas Galindo. "Failure Analysis of a Double Rectangular Deep Drawn Part Using FEM: An Industrial Case." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-39062.

Повний текст джерела

Анотація:

Complex shape deep drawn parts are more frequently used in many industrial applications. However, complex parts can be particularly difficult to form due to serious wrinkling and tearing problems associated to the different forming modes and complex material flow. Moreover, deep drawing depends highly on the part design, including radii, draw depths, wall angles, steps and transitions; these variables interact to affect the cost and quality of the drawing. Since there are not theoretical methods available in the literature yet, and because several factors affect the drawn, deep drawing of complex shapes is usually developed using the trial and error method. To increase the speed of the design process and the machine tuning, and to reduce the use of the trial and error method, computer-assisted analysis and simulations based on numerical approaches such as Finite Element Method (FEM), are more intensively used. By using these computerized methods, process parameters (sheet metal material, lubricants, forces, part geometry etc.) can be reproduced and modified, part defects can be also identified and, if possible, eliminated. This paper presents the analysis of an industrial double rectangular deep drawing kitchen sink using virtual prototyping based on FEM. In the original deep drawing process the part presented defects (cracks). A failure criterion was established to evaluate and reduce the stresses levels that were causing the cracks. An analysis procedure was then proposed and the optimal lubrication conditions were obtained to eliminate the cracks. FEM model, simulations and results, were validated by measuring the thickness of the actual fabricated part. The thickness of the sheet metal at the critical area was measured in the FEM simulation and compared with the thickness profile of the actual fabricated part before and after changes in the lubrication conditions. The results have shown that FEM can be effectively used as a design tool to eliminate part defects in complex shape deep drawing processes.

Стилі APA, Harvard, Vancouver, ISO та ін.

Shende, Ketan V., and Richard Keltie. "Modelling and Experimental Comparison of Fluid Structure Coupling for Thin Sheet Metal Tanks Using Statistical Energy Analysis." In ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-59071.

Повний текст джерела

Анотація:

Acoustic response of flat surfaces in contact with a fluid volume is of some interest for the design of automotive fuel tanks, fluid containers and underwater applications [1]. As this response can be related to the surface vibration response in the linear domain, the effect of fluid structure coupling on the vibration response of the structure is studied in this paper. Advances in the computational abilities have increased the focus of analysis-led approaches in the design of thin sheet metal tanks. Conventional finite element (FE) based approaches are useful at low frequencies but are highly sensitive to geometrical details and local effects at higher frequencies. With changing input parameters, finite element approaches could prove to be computationally expensive during the initial design phase of such structures. Statistical Energy Analysis (SEA) is an energy based approach and was used to study the fluid structure coupling effect on the vibration characteristics of a simple rectangular parallelepiped thin sheet metal tank. A thin steel tank (thickness/min. characteristic dimension <0.01) was excited by a broad band uniform power spectral density white noise signal and the spatial and frequency averaged acceleration responses were compared. Some parameters like the damping loss factor and the excitation force were calculated from the experimental measurements and used as input for SEA simulations. Coupling loss factors were calculated from tests and the trend lines were found to be in agreement with the theoretical calculations. The SEA simulation model results were compared with the conventional FE based approach for reference. Variance studies were used to compute the envelope for the SEA simulation response for a 90% confidence interval. The SEA and the test results comparison was quantified by a correlation coefficient which indicated a moderately strong correlation (>0.5) between the SEA and experimental results.

Стилі APA, Harvard, Vancouver, ISO та ін.

Santo, Loredana, Alessandro Guglielmotti, and Fabrizio Quadrini. "Formability of Open-Cell Aluminum Foams by Laser." In ASME 2010 International Manufacturing Science and Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/msec2010-34282.

Повний текст джерела

Анотація:

A new forming method for open-cell aluminum (Al) foams by laser was introduced. Laser forming is generally applied to sheet metals but a good formability was observed also for Al alloy cellular structures. In this study, laser bending tests were performed on rectangular samples made of open-cell Al alloy foams by means of a diode laser. Laser scan velocity and power were changed in the experimentation so as to identify the best process conditions for three different Al foams. A finite element model was implemented to simulate the laser-material interaction during forming in dependence of the foam structure. At fixed values of laser velocity and power, higher bending angles were obtained for foams with smaller pores but, changing the process parameters, a better formability was observed for the foams with bigger pores.

Стилі APA, Harvard, Vancouver, ISO та ін.

Mondal, Subhajit, Sushanta Chakraborty, and Nilanjan Mitra. "Estimation of Elastic Parameters of Sandwich Composite Plates Using a Gradient Based Finite Element Model Updating Approach." In ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/smasis2016-9005.

Повний текст джерела

Анотація:

The dynamic behavior of sandwich composite structures needs to be predicted as accurately as possible for ensuring safety and serviceability. A properly converged finite element model can accurately predict such behavior, if the current material properties are determined within very close ranges to their actual values. The initial nominal values of material properties are guessed from established standards or from manufacturer’s data, followed by verification through quasi-static characterization tests of extracted samples. Such structures can be modal tested to determine the dynamic responses very accurately, as and when required. A mathematically well posed inverse problem can thus be formulated to inversely update the material parameters accurately from initial guesses through finite element model updating procedures. Such exercise can be conveniently used for condition assessment and health monitoring of sandwich composite structures. The method is capable of determining the degradation of material properties, hence suitable for damage detection. The in-plane as well as out-of-plane elastic moduli can be determined to predict the actual responses which can be verified by physical measurement. In the present investigation, the in-plane and out-of-plane elastic parameters of the face sheets made of glass fiber reinforced plastics, i.e. E1, E2, G12, G13, G23 of the face sheet and the Young’s modulus (E) of the core of a sandwich composite plate has been determined inversely from available modal responses. The method is based on the correlation between the dynamic responses as predicted using finite element model and those measured from modal testing to form the objective function, sensitive enough to the in-plane and out-of-plane material constants. A gradient based Inverse Eigensensivity Method (IEM) has been implemented to identify these material parameters of a rectangular sandwich composite plate from natural frequencies. It may be noted that the initial characterization test data may not be useful in predicting accurate dynamic responses of existing degraded sandwich structures, if the material constants have changed substantially. Destructive characterization test on existing structure is mostly not permitted as samples need to be extracted which may damage the otherwise intact structure.

Стилі APA, Harvard, Vancouver, ISO та ін.

Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!