Bibliographies thématiques / Structural analysis (Engineering) Composite materials. Finite element method

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Littérature scientifique sur le sujet « Structural analysis (Engineering) Composite materials. Finite element method »

Auteur : Grafiati
Publié le 4 juin 2021
Mis à jour le 10 février 2022

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Articles de revues sur le sujet "Structural analysis (Engineering) Composite materials. Finite element method"

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Imura, Makoto, Tetsusei Kurashiki, Hiroaki Nakai et Masaru Zako. « A Multi-Scale Analysis for an Evaluation of the Mechanical Properties of Composite Materials ». Key Engineering Materials 334-335 (mars 2007) : 585–88. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.585.

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Fiber reinforced composite materials have been applied widely to many structures, because they have some advantages like easy handling, high specific strength, etc. The numerical method like finite element method has been applied to design and to evaluate the material properties and behavior as the development of Computer Aided Engineering. It is very difficult to calculate with accuracy not only in structural scale but also in detail material scale (for example, the order of fiber diameter) by the traditional FEM, becausecompositematerials like woven fabric composites have the geometrical complexityand the large difference between above mentioned scales. The development of multi-scale analysis method is one of the major topics in computational mechanics. Mesh superpositionis one of multi-scale analysis methods and is an effective method to solve the problems which have the large difference between the structure scale and the reinforcement scale. We have expanded the finite element mesh superposition method with 3 scales and have defined as M3 (Macro-Meso-Micro) method. In this paper, we have proposed a new approach method combined with M3 method and homogenized method to obtain the mechanical properties and to simulate the behavior of woven fabric composites. In addition, the elastic-plastic mechanics and the damage mechanics have been introduced into M3 method to investigate the effects of matrix-crack on the structural and material properties. From the numerical results, it is revealed that it is very useful for the evaluation of mechanical properties of composite materials.
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Boudounit, Hicham, Mostapha Tarfaoui, Dennoun Saifaoui et Mourad Nachtane. « Structural analysis of offshore wind turbine blades using finite element method ». Wind Engineering 44, no 2 (23 mai 2019) : 168–80. http://dx.doi.org/10.1177/0309524x19849830.

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Wind energy is one among the most promising renewable energy sources, and hence there is fast growth of wind energy farm implantation over the last decade, which is expected to be even faster in the coming years. Wind turbine blades are complex structures considering the different scientific fields involved in their study. Indeed, the study of blade performance involves fluid mechanics (aerodynamic study), solids mechanics (the nature of materials, the type of solicitations …), and the fluid coupling structure (IFS). The scope of the present work is to investigate the mechanical performances and structural integrity of a large offshore wind turbine blade under critical loads using blade element momentum. The resulting pressure was applied to the blade by the use of a user subroutine “DLOAD” implemented in ABAQUS finite element analysis software. The main objective is to identify and predict the zones which are sensitive to damage and failure as well as to evaluate the potential of composite materials (carbon fiber and glass fiber) and their effect on reduction of rotor’s weight, as well as the increase of resistance to wear, and stiffness.
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You, Feng Xiang, Fei Zhang et Buo Lei Zuo. « Spline-Based Finite Element Analysis in Composite Laminates Mechanical Properties ». Applied Mechanics and Materials 138-139 (novembre 2011) : 673–80. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.673.

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The geometric parameters of the composite laminate in the engineering structure tend to have random properties. It is of great significance on how to study sensitivity of random parameters of laminated plates and carry on the optimized analysis to the parameteranalys when accurately estimating the reliability of structural design. According to the first order shear deformation theory, by using the spline finite element method, we can infer and the establish a laminated plate vibration equation, the stiffness matrix, mass matrix, proportional damping matrix, before making solution of the antisymmetric laminated plates response sensitivity formula, and analyzing the normal displacement, the sensitivity, the natural frequency of compound materials laminated plate. The Numerical examples verify the effectiveness of this algorithm.
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Lee, Dong Gyu, Ji Woo Nam, Soo-Hyun Kim et Seong Wook Cho. « Structure Optimization of a High-Temperature Oxygen-Membrane Module Using Finite Element Analysis ». Energies 14, no 16 (14 août 2021) : 4992. http://dx.doi.org/10.3390/en14164992.

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The oxygen transport membrane (OTM) is a high-density ion-conducting ceramic membrane that selectively transfers oxygen ions and electrons through the pressure differential across its layers. It can operate at more than 800 °C and serves as an economical method for gas separation. However, it is difficult to predict the material properties of the OTM through experiments or analyses because its structure contains pores and depends on the characteristics of the ceramic composite. In addition, the transmittance of porous ceramic materials fluctuates strongly owing to their irregular structure and arbitrary shape, making it difficult to design such materials using conventional methods. This study analyzes the structural weakness of an OTM using CAE software (ANSYS Inc., Pittsburgh, PA, USA). To enhance the structural strength, a structurally optimized design of the OTM was proposed by identifying the relevant geometric parameters.
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Lin, J. J., M. Fafard, D. Beaulieu et B. Massicotte. « Nonlinear analysis of composite bridges by the finite element method ». Computers & ; Structures 40, no 5 (janvier 1991) : 1151–67. http://dx.doi.org/10.1016/0045-7949(91)90386-z.

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A, Karthick. « Temperature Distribution Analysis of Composite Heat Sink (Pin Fin) by Experimental and Finite Element Method ». Journal of Manufacturing Engineering 16, no 1 (1 mars 2021) : 018–23. http://dx.doi.org/10.37255/jme.v16i1pp018-023.

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Design of machine components plays a vital role in the field of Engineering where it includes the shape of component, size, applied loads, position and materials used. Due to the applied loads namely static, thermal and combined loads etc., the component undergoes stresses and deformations which affect the life of component and also the system. The Finite Element Method (FEM) is a numerical tool used for solving problems of engineering and mathematical problems in the fields of structural analysis, heat transfer, fluid flow, mass transport etc., For problems involving complicated geometries, loadings and material properties, it is generally not possible to obtain analytical solutions. These solutions generally require the ordinary or partial differential equations. Because of the complicated geometries, loadings and material properties, the solution can’t be obtained easily. So, in FEM the complicated shape of the component is divided in to small entities called elements. Element characteristics are studied and then all the elements are combined to make a single system of component. In the present work, Experiments have been conducted to find the temperature distribution within the pin fin made of composite metals and steady state heat transfer analysis has been carried using a finite element software ANSYS to test and validate results. The temperature distribution at different regions of pin fin are evaluated by FEM and compared with the results obtained by experimental work. The results are in good agreement and thus validated.
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Youn, Sung-Kie, et E. B. Becker. « A finite element method for the analysis of piezoelectric composite hydrophones ». Computers & ; Structures 44, no 6 (septembre 1992) : 1215–23. http://dx.doi.org/10.1016/0045-7949(92)90365-7.

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Tran, Trung Thanh, Van Ke Tran, Pham Binh Le, Van Minh Phung, Van Thom Do et Hoang Nam Nguyen. « Forced Vibration Analysis of Laminated Composite Shells Reinforced with Graphene Nanoplatelets Using Finite Element Method ». Advances in Civil Engineering 2020 (3 janvier 2020) : 1–17. http://dx.doi.org/10.1155/2020/1471037.

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This paper carries out forced vibration analysis of graphene nanoplatelet-reinforced composite laminated shells in thermal environments by employing the finite element method (FEM). Material properties including elastic modulus, specific gravity, and Poisson’s ratio are determined according to the Halpin–Tsai model. The first-order shear deformation theory (FSDT), which is based on the 8-node isoparametric element to establish the oscillation equation of shell structure, is employed in this work. We then code the computing program in the MATLAB application and examine the verification of convergence rate and reliability of the program by comparing the data of present work with those of other exact solutions. The effects of both geometric parameters and mechanical properties of materials on the forced vibration of the structure are investigated.
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Javanbakht, Zia, Wayne Hall, Amandeep Singh Virk, John Summerscales et Andreas Öchsner. « Finite element analysis of natural fiber composites using a self-updating model ». Journal of Composite Materials 54, no 23 (24 mars 2020) : 3275–86. http://dx.doi.org/10.1177/0021998320912822.

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The aim of the current work was to illustrate the effect of the fibre area correction factor on the results of modelling natural fibre-reinforced composites. A mesoscopic approach is adopted to represent the stochastic heterogeneity of the composite, i.e. a meso-structural numerical model was prototyped using the finite element method including quasi-unidirectional discrete fibre elements embedded in a matrix. The model was verified by the experimental results from previous work on jute fibres but is extendable to every natural fibre with cross-sectional non-uniformity. A correction factor was suggested to fine-tune both the analytical and numerical models. Moreover, a model updating technique for considering the size-effect of fibres is introduced and its implementation was automated by means of FORTRAN subroutines and Python scripts. It was shown that correcting and updating the fibre strength is critical to obtain accurate macroscopic response of the composite when discrete modelling of fibres is intended. Based on the current study, it is found that consideration of the effect of flaws on the strength of natural fibres and inclusion of the fibre area correction factor are crucial to obtain realistic results.
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Cheng, Tai Hong, Il Soo Kim, Soon Young Park, Zhen Zhe Li et Yun De Shen. « Structural Stability Analyses of Composite Laminate Wind Turbine ». Advanced Materials Research 287-290 (juillet 2011) : 1486–91. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.1486.

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The paper describes a structural stability analysis of fiber reinforced 10kW composite laminate wind turbine blades by using finite element method. The E-glass/epoxy orthotropic materials DB300、DBL850、L900 were employed for construction of a composite laminate shell structure. The composite laminate sheel structures were constructed by two types of lamination method. The rotating effect of wind blade was considered using the linear and the nonlinear static analysis. The results of the nonlinear analysis of displacement and stress show much lower than the linear analysis, because of the geometry nonlinear effect. From the contours of stress and displacement, the maximum stress appeared at the root of the blade, and maximum deformation occurred at the tip of the blade. Finally, the modal properties of the wind blade was investigated, including the natural frequency, modeshaps, and the centrifugal effect.
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Thèses sur le sujet "Structural analysis (Engineering) Composite materials. Finite element method"

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Geyer, Susanna Elizabeth. « Advanced low order orthotropic finite element formulations ». Diss., Pretoria : [s.n.], 2001. http://upetd.up.ac.za/thesis/available/etd-03062006-114313/.

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Odi, A. R. A. « Bonded Repair of Composite Structures ; A Finite Element Approach ». Thesis, Department of Materials and Medical Sciences, 2009. http://hdl.handle.net/1826/3893.

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This thesis addresses the issues surrounding the application of the finite element method to analyse composite structure repairs with an emphasis on aircraft applications. A comprehensive literature survey has been carried out for this purpose and the results are presented. A preliminary study and a comparative study of different modelling approaches have been completed. These studies aim to explore and identify the problems in modelling repairso n simplec ompositep anelsw ith speciala ttention given to adhesivem odelling. Three modelling approaches have been considered: Siener's model which is an extension of the traditional plane strain 2D model used for adhesively bonded joints, Bait's model which is a promising new approach and a full 3D model. These studies have shown that these methods are complementary providing a different insight into bonded repairs. They have also highlighted the need for a new modelling approach which will provide an overall view of bonded repairs. Improved modelling approachesh ave been developedf or externallyb onded patch and flush repairs. These models enable the study of adhesive failure as well as composite adherendf ailures.T hesea pproachesh aveb eena ppliedt o real repairs and the predicted results compared to experimental data. Four case studies have been conducted: external bonded patch repairs to composite plates, a scarf joint for bonded repairs, a flat panel repaired with a scarfed patch and a repaired curved panel. These case studies have shown that bonded repairs to composite structures can be analyseds uccessfullyu sing PC-basedc ommercialf inite elementc odes.
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Odi, A. Randolph A. « Bonded repair of composite structures : a finite element approach ». Thesis, Cranfield University, 1998. http://dspace.lib.cranfield.ac.uk/handle/1826/3893.

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This thesis addresses the issues surrounding the application of the finite element method to analyse composite structure repairs with an emphasis on aircraft applications. A comprehensive literature survey has been carried out for this purpose and the results are presented. A preliminary study and a comparative study of different modelling approaches have been completed. These studies aim to explore and identify the problems in modelling repairso n simplec ompositep anelsw ith speciala ttention given to adhesivem odelling. Three modelling approaches have been considered: Siener's model which is an extension of the traditional plane strain 2D model used for adhesively bonded joints, Bait's model which is a promising new approach and a full 3D model. These studies have shown that these methods are complementary providing a different insight into bonded repairs. They have also highlighted the need for a new modelling approach which will provide an overall view of bonded repairs. Improved modelling approachesh ave been developedf or externallyb onded patch and flush repairs. These models enable the study of adhesive failure as well as composite adherendf ailures.T hesea pproachesh aveb eena ppliedt o real repairs and the predicted results compared to experimental data. Four case studies have been conducted: external bonded patch repairs to composite plates, a scarf joint for bonded repairs, a flat panel repaired with a scarfed patch and a repaired curved panel. These case studies have shown that bonded repairs to composite structures can be analyseds uccessfullyu sing PC-basedc ommercialf inite elementc odes.
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Swindeman, Michael James. « A Regularized Extended Finite Element Method for Modeling the Coupled Cracking and Delamination of Composite Materials ». University of Dayton / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1324605778.

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Rajagopal, Anurag. « Advancements in rotor blade cross-sectional analysis using the variational-asymptotic method ». Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51877.

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Rotor (helicopter/wind turbine) blades are typically slender structures that can be modeled as beams. Beam modeling, however, involves a substantial mathematical formulation that ultimately helps save computational costs. A beam theory for rotor blades must account for (i) initial twist and/or curvature, (ii) inclusion of composite materials, (iii) large displacements and rotations; and be capable of offering significant computational savings compared to a non-linear 3D FEA (Finite Element Analysis). The mathematical foundation of the current effort is the Variational Asymptotic Method (VAM), which is used to rigorously reduce the 3D problem into a 1D or beam problem, i.e., perform a cross-sectional analysis, without any ad hoc assumptions regarding the deformation. Since its inception, the VAM based cross-sectional analysis problem has been in a constant state of flux to expand its horizons and increase its potency; and this is precisely the target at which the objectives of this work are aimed. The problems addressed are the stress-strain-displacement recovery for spanwise non-uniform beams, analytical verification studies for the initial curvature effect, higher fidelity stress-strain-displacement recovery, oblique cross-sectional analysis, modeling of thin-walled beams considering the interaction of small parameters and the analysis of plates of variable thickness. The following are the chief conclusions that can be drawn from this work: 1. In accurately determining the stress, strain and displacement of a spanwise non-uniform beam, an analysis which accounts for the tilting of the normal and the subsequent modification of the stress-traction boundary conditions is required. 2. Asymptotic expansion of the metric tensor of the undeformed state and its powers are needed to capture the stiffnesses of curved beams in tune with elasticity theory. Further improvements in the stiffness matrix can be achieved by a partial transformation to the Generalized Timoshenko theory. 3. For the planar deformation of curved laminated strip-beams, closed-form analytical expressions can be generated for the stiffness matrix and recovery; further certain beam stiffnesses can be extracted not only by a direct 3D to 1D dimensional reduction, but a sequential dimensional reduction, the intermediate being a plate theory. 4. Evaluation of the second-order warping allows for a higher fidelity extraction of stress, strain and displacement with negligible additional computational costs. 5. The definition of a cross section has been expanded to include surfaces which need not be perpendicular to the reference line. 6. Analysis of thin-walled rotor blade segments using asymptotic methods should consider a small parameter associated with the wall thickness; further the analysis procedure can be initiated from a laminated shell theory instead of 3D. 7. Structural analysis of plates of variable thickness involves an 8×8 plate stiffness matrix and 3D recovery which explicitly depend on the parameters describing the thickness, in contrast to the simplistic and erroneous approach of replacing the thickness by its variation.
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Chandrashekhara, K. « Geometric and material nonlinear analysis of laminated composite plates and shells ». Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/54739.

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An inelastic material model for laminated composite plates and shells is formulated and incorporated into a finite element model that accounts for both geometric nonlinearity and transverse shear stresses. The elasto-plastic material behavior is incorporated using the flow theory of plasticity. In particular, the modified version of Hill's initial yield criterion is used in which anisotropic parameters of plasticity are introduced with isotropic strain hardening. The shear deformation is accounted for using an extension of the Sanders shell theory and the geometric nonlinearity is considered in the sense of the von Karman strains. A doubly curved isoparametric rectangular element is used to model the shell equations. The layered element approach is adopted for the treatment of plastic behavior through the thickness. A wide range of numerical examples is presented for both static and dynamic analysis to demonstrate the validity and efficiency of the present approach. The results for combined nonlinearity are also presented. The results for isotropic results are in good agreement with those available in the literature. The variety of results presented here based on realistic material properties of more commonly used advanced laminated composite plates and shells should serve as references for future investigations.
Ph. D.
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Nezamian, Abolghasem 1968. « Bond strength of concrete plugs embedded in tubular steel piles ». Monash University, Dept. of Civil Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/5601.

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Chang, Cherng-Chi. « Finite element analysis of laminated composite free-edge delamination specimens / ». The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487584612162791.

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Taylor, Joshua Michael. « Nonlinear analysis of steel frames with partially restrained composite connections and full or partially composite girders ». Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/19272.

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Widjaja, Budi R. « Analytical investigation of composite diaphragms strength and behavior ». Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-07112009-040307/.

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Livres sur le sujet "Structural analysis (Engineering) Composite materials. Finite element method"

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Tenek, Lazarus Teneketzis. Finite element analysis for composite structures. Dordrecht : Kluwer Academic Publishers, 1998.

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Ostachowicz, W. M. Guided waves in structures for SHM : The time-domain spectral element method. Chichester, West Sussex : Wiley, 2012.

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Tenek, Lazarus Teneketzis. Finite Element Analysis for Composite Structures. Dordrecht : Springer Netherlands, 1998.

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Kang, Feng. Mathematical theory of elastic structures. Berlin : Springer, 1996.

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Finite element analysis of composite materials using Abaqus. Boca Raton, FL : CRC Press,Taylor & Francis Group, 2013.

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Mukhopadhyay, Madhujit. Structures : Matrix and finite element. 3e éd. Rotterdam, Netherlands : A.A. Balkema, 1993.

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Martin, C. Wayne. A three-node C(superscript)0 element for analysis of laminated composite sandwich shells. Edwards, Calif : Ames Research Center, 1989.

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Blaauwendraad, J. Plates and FEM : Surprises and Pitfalls. Dordrecht : Springer Science+Business Media B.V., 2010.

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Hartmann, Friedel. Green's Functions and Finite Elements. Berlin, Heidelberg : Springer Berlin Heidelberg, 2013.

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Marjamäki, Heikki. Siirtymäperusteisen elementtimenetelmäohjelmiston suunnittelu ja ohjelmointi. Espoo [Finland] : VTT, 2003.

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Chapitres de livres sur le sujet "Structural analysis (Engineering) Composite materials. Finite element method"

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Cen, Song, et Yu-Qiu Long. « Generalized Conforming Element for the Analysis of Piezoelectric Laminated Composite Plates ». Dans Advanced Finite Element Method in Structural Engineering, 304–24. Berlin, Heidelberg : Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00316-5_10.

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Cen, Song, et Yu-Qiu Long. « Generalized Conforming Element for the Analysis of the Laminated Composite Plates ». Dans Advanced Finite Element Method in Structural Engineering, 268–303. Berlin, Heidelberg : Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00316-5_9.

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Dzuba, A. S., A. A. Ionov et V. F. Kutyinov. « Application of the finite-element method to the structural analysis of composite structures ». Dans Composite Materials in Aerospace Design, 372–88. Dordrecht : Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-0575-0_6.

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Tamlicha, Akram, Samsul Rizal, Iskandar Hasanuddin, Adhittya Pahlevi, Nazaruddin, M. M. Noor et Ichsan Setiawan. « Stress and Strain Analysis of the Traditional Boat Jaloe Kayoh Made of Composite Materials with Centered Loading Using the Finite Element Method ». Dans Proceedings of the 2nd International Conference on Experimental and Computational Mechanics in Engineering, 289–99. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0736-3_29.

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Jahun, B. G., D. Ahmad, S. Shamsuddeen, D. D. Usman et N. A. Abubakar. « Tractor Mounted Mulcher Blade Structural Analysis Using Finite Element Method ». Dans Reference Module in Materials Science and Materials Engineering. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-803581-8.10497-7.

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Lu, L., et E. Xu. « Equivalent strain analysis of piercing process in Diescher’s mill using finite element method ». Dans Advanced Materials and Structural Engineering, 829–31. CRC Press, 2016. http://dx.doi.org/10.1201/b20958-170.

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« Finite element vibration analysis of pole structures made of advanced composite materials ». Dans Research and Applications in Structural Engineering, Mechanics and Computation, 357–58. CRC Press, 2013. http://dx.doi.org/10.1201/b15963-166.

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« Jones, R.A. and Peiris, R.S.A., "Load Distribution Analysis Of A Continuous Two-Span Multi-Beam Bridge Deck", ARRB (Australia Road Research Board) Proceedings, Vol. II, Part 2,1982. 16. "Distribution Of Wheel Loads On Highway Bridges", NCHRP Project 20-5, Topic 14-22, February, 1984 17. Hays, C.O. and Hackey, J.E., "Lateral Distribution Of Wheel Loads On Highway Bridges using The Finite Element Method", Structures And Materials Research Report No. 84-3, University of Florida, Department of Civil Engineering, December, 1984. 18. Newmark, N.M., Seiss, C.P. and Penman, R.R., "Studies of Slab And Beam Highway Bridges - Part I Tests Of Simple Span Right I-Beam Bridges", University of Illinois, Bulletin, March, 1946. 19 Burdette, E.G. and Goodpasture, D.W., "Full-Scale Bridge Testing - An Evaluation of Bridge Design Criteria", Final Report. The University of Tennessee, Department of Civil Engineering, Dec. 1971. 20. King, J.P.C. and Csagoly, P.F., "Field Testing of Aguasabon River Bridge in Ontario", Transportation Research Record 579, 1976. 21. Dorton, R.A., Holowka, M., and King, J.P.C., "The Conestogo River Bridge - Design and Testing", Canadian Journal of Civil Engineering, Vo). Heins, C.P., "Highway Bridge Field Tests In The United States, 1948-70', pulbic Roads, 1972. 25. Gangarao, H.V.S., "Survey Of Field And Laboratory Tests On Bridge Systems", Transportation Research Record 645, 1977. » Dans Composite Steel Structures, 54. CRC Press, 1987. http://dx.doi.org/10.1201/9781482286359-14.

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« Fu, C.C. and Colville, J., "Inelastic Analysis of Continuous Composite Highway Bridges", CE Report No. 62, University of Maryland, College Park, MD., Dec. 1975. 6. Heins, C.P., "LFD Criteria For Composite Steel I-Beam Bridges", ASCE Journal Of The Structural Division, November 1980. 7. Walker, W.H., "Lateral Load Distribution In Multi-Girder Bridges", Proceedings of the AISC National Engineering Conference, Nashville, Tennessee - June 12-14, 1986. 8. Hays, C.O., Sessions, L.M. and Berry, A.J., "Further Studies On Lateral Load Distribution Using a Finite Element Method", Transportation Research Record 1072, Transportation Research Board (TRB), Washington, D.C. 1986. 9. Arendts, J., "Study Of Experimental and Theoretical Load Distribution In Highway Bridges”, M.S. Thesis, Iowa State University, December, 1967. 10. Gurbuz, Orhan, Theories of Transverse Load Distribution On Simple-Span (non-skewed) Beam-And-Slab Bridges", M.S. Thesis, Iowa State University, 1968. 11. Sanders, W.W., Jr. and Elleby, H.A., "Distribution of Wheel Loads On Highway Bridges", NCHRP Report 83, 1970 12. Jones, R.A., "A Simple Alogorithm for Computing Load Distribution In Multi-Beam Bridge Decks", ARRB (Australia Road Research Board) proceedings, Vol. 8, 1976. 13. McDougle, E.A., Bryan, R.H., Burdette, E.G. and Goodpasture, D.W., "Lateral Load Distribution For Two Continuous Steel Girder Highway Bridges", Transportation Research Record 607, 1976. 14. Culham, G.A. and Ghali, A. "Distribution Of Wheel Loads on Bridge Girders", Canadian Journal of Civil Engineering, Vol. 4,1977. » Dans Composite Steel Structures, 53. CRC Press, 1987. http://dx.doi.org/10.1201/9781482286359-13.

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Actes de conférences sur le sujet "Structural analysis (Engineering) Composite materials. Finite element method"

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Ahmadian, M. T., A. Taghvaeipour et M. Bonakdar. « Application of a New Cylindrical Element Formulation in Finite Element Structural Analysis of FGM Hollow Cylinders ». Dans ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66284.

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Functionally graded materials are advanced composite materials consisting two or more material ingredients that are engineered to have a continuous spatial variation of properties. There are a few analytical methods available to solve the governing equations of FGM made structures, confined to some specific and limited shapes, loadings and boundary conditions. Hence the numerical methods such as FEM are used to treat these materials. In previous studies the finite element method was used to solve thin walled FG structures like shells and plates by modification of the conventional shell and plate elements. Solving the thick walled FG structures confronts some difficulties. One of the methods to overcome this problem is laminating the structure across the direction of material variation, assuming constant material properties in each layer. When the thickness is increased, the number of layers representing the FGM should be also increased to produce an accurate result. Increasing the number of elements implies great time consumption and required memory space. One of the most commonly shapes present in FG structures are hollow cylinders whose analysis is so complicated that may not be done by conventional elements. In this study a superelement approach is chosen to confront the problem. Design and application of superelements in efficient prediction of the structural behavior in a short time has been one of the research interests in the last decade. The superelements are designed for special problems so that they could substitute a huge number of conventional elements in modeling and analysis. In this study a new cylindrical superelement is incorporated to model the functionally graded cylinders, and modal analysis is performed. The advantage of this cylindrical superelement lies in the fact that no lamination is needed, anymore and only a few superelements can predict the vibration behavior of FG cylinders accurately. Several examples are solved based on the new element formulation and the natural frequencies and mode shapes are obtained. Comparison of the findings with the conventional elements reveals time saving and accuracy of the results.
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Jung, Dongho, Hyeonju Kim, Moonho Tak, Kyungjae Lee et Taehyo Park. « Dynamic Structural Analysis of a Large-Diameter Riser Consisting of Laminated Composite Material With a Hybrid Numerical Scheme ». Dans ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10868.

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A hybrid numerical scheme is developed to analyze the structural dynamic behavior of a large-diameter riser made of a laminated composite material. The global dynamic behavior of the riser, considered as a beam element subjected to a wave and current, is solved with the finite element analysis method in the time domain. The equivalent elastic modulus of a laminated composite riser for the global dynamic analysis is calculated from the stress-strain relation of a laminate structure with a different elastic modulus. For elements in large displacement and stresses estimated from the dynamic analysis, local structural analysis is performed with the finite element analysis method to examine the structural safety of the laminates of the composite riser, which is considered as a hexahedral element. The developed hybrid numerical tool can contribute to structural safety verification of large-diameter risers composed of laminated composites.
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Dwibedi, Subhasankar. « A New Trefftz Based Finite Element for Static Analysis of Laminated Composite Structures ». Dans ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11116.

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Abstract Composite materials have been widely used in industries for several years owing to their capability to perform better than homogeneous isotropic materials. Numerical tools like finite element method are efficiently used for analysis of structures made of composite materials. However, for complex shapes or geometries of structures, it becomes uneconomical (computational resource wise) to use Rayleigh-Ritz based finite element analysis. An unique Trefftz based finite element has been developed in this article to efficiently fill the gap in the above mentioned scenario. Hybrid-Tefftz finite element method’s flexibility to use arbitrary shaped elements comes handy in modelling complex geometries. The developed hybrid-Trefftz finite element approach has been used on symmetric angle-ply laminated composite plate and the obtained results have been compared with bench mark solutions. The present method proposes an approach for development of hybrid-Trefftz type finite elements, by which analysis of antisymmetric structures is also possible, an area of research which has been less explored by such approach as revealed from survey of available open literature.
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Alagöz, Çağdaş, M. A. Sahir Arıkan, Ö. Gündüz Bilir et Levend Parnas. « 3-D Finite Element Analysis of Long Fiber Reinforced Composite Spur Gears ». Dans ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/ptg-14357.

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Abstract A method and a computer program are developed for 3-D finite element analysis of long fiber reinforced composite spur gears, in which long fibers are arranged along tooth profiles. For such a structure, the gear is composed of two regions; namely the long fiber reinforced and the chopped fiber reinforced regions. Pre and post-processing modules of the program for the finite element analysis are written in Borland Delphi Pascal 3.0®. ABAQUS® is used for finite element analysis. Main inputs for the pre-processing module of the program are, information on basic gear geometry, gear drive data, material properties and long fiber reinforcement geometry. Finite element meshes are automatically generated and mesh information with other required data are written to a file in the input-file-format of ABAQUS®. Stresses are read from the output file of ABAQUS® by the post-processing module, and color-coded drawings for various stresses and failure index are displayed. For the long fiber reinforced region, failure indexes are calculated by using the tensor polynomial failure criterion. Effects of reinforcing thickness and location of long fibers on gear strength are investigated. Stresses and failure index are calculated for different materials and fiber volume ratios.
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Yu, Qing, et Jer-Fang Wu. « Multi-Scale Finite Element Simulation of Progressive Damage in Composite Structures ». Dans 25th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/omae2006-92064.

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A methodology for analyzing progressive damage accumulation on multiple spatial scales (micro- and macro-scale) in composite materials is presented in this paper. Idealization (homogenization) of heterogeneous media and evolution of damage on micro- and macro-scales are considered simultaneously at each incremental analysis step. The classical mathematical homogenization theory is extended to account for damage effects on distinct spatial scales through the introduction of an asymptotic expansion of damage parameter (or damage tensor in general). Local solutions on micro-scale provide the homogenized material properties that a global structure behaves on the macro-scales. The responses in the local fields, i.e. microscopic phases, can be reconstructed through the scale linking relations along with the global responses as input. The application of this multi-scale simulation method to composite patch repair for offshore structures is demonstrated by numerical examples.
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Podshivalov, Lev, Anath Fischer et Pinhas Z. Bar-Yoseph. « Performance Assessment of Hexahedral Meshing Methods for Design and Mechanical Analysis of Composite Materials ». Dans ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82247.

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Composite materials can be designed and modeled as material volumes with inclusions of several materials. These multiple inclusions are randomly distributed in a unit cube volume according to the material parameters (density, dimensions, orientation etc.). Then, the finite element (FE) analysis method is applied on the resulting structure to estimate the equivalent material properties. Therefore, these models should to be meshed prior to mechanical FE analysis. Automatic high quality hexahedral meshing is considered a very complex task. Hence, despite extensive research, currently there are no robust methods that can handle grain-based geometry. Meshing a composite material modeled by multiple inclusions presents a number of challenges: (a) the meshing needs to be robust to dimensions, position and orientation of the inclusions; (b) mesh continuity must be achieved on the boundaries between the volume (also known as the matrix) and the inclusions; (c) the mesh needs to approximate the original geometric model with high accuracy; and (d) high quality mesh elements are required for mechanical analysis. Structured and unstructured meshing methods can be used for handling this task. In this research two meshing methods were developed to generate high quality meshes: (a) structured meshing created by warping the grid according to the model’s geometry, and (b) unstructured meshing created by projecting the nodes onto the boundaries of the inclusions to achieve exact geometric representation. The performance of these methods was then evaluated and compared on composite materials with ellipsoidal inclusions. Among the performance criteria for these methods are mesh element quality, geometry approximation error, stress concentrations near the boundaries, and computational complexity. The results indicate that the proposed methods can be used for design and mechanical analysis of composite materials. Moreover, in homogenization applications the structured warped mesh is compatible in terms of performance and element quality to the unstructured mesh.
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Micheal, Amany G. B., et Yehia A. Bahei-El-Din. « Finite Element Simulation of PZT-Aided Interrogation of Composite Laminates Exhibiting Damage ». Dans ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66001.

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Piezoelectricity has proved effective in capturing changes in structures caused by various damage mechanisms. In one approach, piezoelectric wafer active sensors (PWAS) are mounted on the surface of the host structure and utilized as both actuators and sensors to interrogate the structure and monitor its health. This is achieved by subjecting the PWAS to a transient electric pulse and reading the resulting voltage. Changes in the stiffness of the substrate due to structural damage affect the response of the PWAS, which could be correlated to integrity of the structure. Applying this technique to fibrous composite laminates encounters particular challenges due to the presence of multiple damage mechanisms in one or more plies. Simulation of the procedure using advanced computational techniques and material models helps in understanding the reliability of PWAS in sensing damage in fibrous laminates. This paper combines the finite element method and micromechanical modeling of composites to simulate damage detection using surface mounted PWAS. The finite element solution is obtained by the ABAQUS code with user defined material properties, which reflect the underlying damage modes. The latter are obtained in a preprocessing exercise in which the composite laminate is first subjected to a given mechanical load level and the damage mechanisms in the plies are identified using transformation field analysis, TFA (Bahei-El-Din el al., 2010). In the present work, the Mori-Tanaka averaging model is utilized within the TFA and local failure modes, which are a function of the matrix average stresses were specified. Material properties of the individual plies, which correspond to the damage mechanisms introduced at the given load level are then determined numerically in terms of the overall moduli and utilized in the finite element solution of the laminate using ABAQUS. The methodology is applied to a quasi-isotropic, symmetric laminated beam subjected to bending. In the finite element simulation, each fibrous composite ply of the laminated beam is modelled using shell elements while the surface mounted PWAS are modeled with 3D solid elements. The bending moment is applied to the beam intermittently to allow interrogation of the laminate by applying a transient electric pulse to the PWAS and allowing the beam to vibrate for a very short period of time, which is followed by reading the voltage response. The voltage readings are correlated to the damage mechanisms in the plies.
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Atanasov, Atanas A., Thomas J. Wright et John P. Parmigiani. « Improvement on the Analysis of a Finite Element Composites Model ». Dans ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63282.

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Finite element models are increasingly being utilized in composite materials design; thus, an increase in the accuracy of the model analysis and a decrease in computational cost are of paramount importance. This study investigates the effects of a particular add-on, Helius:MCT (Firehole Technologies, Inc.), onto the Abaqus (Dassault Systèmes) software package. Unlike the stand-alone Abaqus software, Helius:MCT embodies a solver, which analyzes the composite structure by separating the fiber and matrix into constituent parts. Treating the fiber and matrix as separate, yet linked entities, allows for a more accurate depiction of the formations of stress and strain within the composite. Furthermore, Helius:MCT utilizes a method called Intelligent Discrete Softening (IDS), a feature not present within Abaqus, to increase solver robustness and convergence probability. An Abaqus finite element (FE) model of a notched, carbon-fiber panel loaded in bending was used in this study. Six different laminate combinations were tested with six variations of the Abaqus model. Three of the variations used Helius:MCT with Abaqus and three the stand-alone Abaqus package. The combinations were composed of either 20 or 40 plies with 10, 30, or 50 percent all zero ply orientations. All the FE analysis results were compared to experimental values for a plate of the exact configuration as that of the model. The most accurate results were obtained using Helius:MCT. The configuration with the greatest accuracy utilizes Helius:MCT and deviates an average of 1.7 percent from experimental values for maximum flexural strength. A single run takes an average of 7 hours to complete. Conversely, the most accurate configuration obtained without the use of Helius:MCT deviates an average of 10 percent from the experimental values and takes over 80 hours to run. Helius: MCT increases the accuracy and decreases the computational costs of the analyses of composite models in Abaqus. The improvements in analyses while using Helius: MCT may allow for a substantial savings in experimental costs and in valuable time.
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Askari, Davood, Hiroshi Asanuma et Mehrdad N. Ghasemi-Nejhad. « A Comparative Finite Element Analysis of Residual Stresses in Active Fiber Composites With Embedded Metal-Core Piezoelectric Fibers and Macro Fiber Composites ». Dans ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79049.

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Residual stresses are basically developed due to intrinsic and extrinsic strains that form during the processing of composite materials. The extrinsic strains can be determined using Coefficient of Thermal Expansion (CTE), material properties, geometry of the structure, and processing conditions. Finite Element Method (FEM) as an efficient alternative technique for stress and strain analysis of the micromechanical systems and structures, has been employed to numerically investigate the residual stresses developed in Metal-Core Piezoelectric Fibers (MPF) and Active Fiber Composites (AFC) (or Macro Fiber Composites (MFC)), during the processing. Here in this work, ANSYS Finite Element Analysis (FEA) software is used to develop three different 3-dimensional models for MPF and MFC structures and then each model is solved for strain and stress results. Next, the stress and strain components of these models are studied throughout the structures to identify the magnitude and type of the stresses and strains within the constituent materials and then compared.
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Ebna Hai, Bhuiyan Shameem Mahmood, et Markus Bause. « Finite Element Approximation of Fluid Structure Interaction (FSI) Optimization in Arbitrary Lagrangian-Eulerian Coordinates ». Dans ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62291.

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Advanced composite materials such as Carbon Fiber Reinforced Plastics (CFRP) are being applied to many aircraft structures in order to improve performance and reduce weight. Most composites have strong, stiff fibers in a matrix which is weaker and less stiff. However, aircraft wings can break due to Fluid-Structure Interaction (FSI) oscillations or material fatigue. This paper focuses on the analysis of a non-linear fluid-structure interaction problem and its solution in the finite element software package DOpElib: the deal.II based optimization library. The principal aim of this research is to explore and understand the behaviour of the fluid-structure interaction during the impact of a deformable material (e.g. an aircraft wing) on air. Here we briefly describe the analysis of incompressible Navier-Stokes and Elastodynamic equations in the arbitrary Lagrangian-Eulerian (ALE) frameworks in order to numerically simulate the FSI effect on a double wedge airfoil. Since analytical solutions are only available in special cases, the equation needs to be solved by numerical methods. This coupled problem is defined in a monolithic framework and fractional-step-θ time stepping scheme are implemented. Spatial discretization is based on a Galerkin finite element scheme. The non-linear system is solved by a Newton method. The implementation using the software library package DOpElib and deal.II serves for the computation of different fluid-structure configurations.
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