Дисертації з теми "Sandwich composite beam"
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Davis, Richard Anthony. "The Effects of a Damage Arrestment Device on the Mechanical Behavior of Sandwich Composite Beams Under Four-Point Bending." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/506.
Повний текст джерелаGlenn, Christopher Edward. "Fabrication and Structural Performance of Random Wetlay Composite Sandwich Panels." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/43208.
Повний текст джерелаMaster of Science
Hove, Darlington. "Finite element analysis of a composite sandwich beam subjected to a four point bend." Thesis, Nelson Mandela Metropolitan University, 2011. http://hdl.handle.net/10948/1465.
Повний текст джерелаHo, Qhinhon D. "An Assessment Of The Accuracy Of The Euler-Bernoulli Beam Theory For Calculating Strain and Deflection in Composite Sandwich Beams." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/2084.
Повний текст джерелаPetras, Achilles. "Design of sandwich structures." Thesis, University of Cambridge, 1999. https://www.repository.cam.ac.uk/handle/1810/236995.
Повний текст джерелаASCIONE, ALESSIA. "Synthetic models for the analysis and control of composite and sandwich aerospace structures in critical conditions." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2751494.
Повний текст джерелаIsildak, Murat. "Use Of Helical Wire Core Truss Members In Space Structures." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610553/index.pdf.
Повний текст джерелаMaheri, M. R. "Vibration damping in composite/honeycomb sandwich beams." Thesis, University of Bristol, 1991. http://hdl.handle.net/1983/d96ba3e9-edb0-4a07-ac6e-69328ed22678.
Повний текст джерелаJoshi, Ninad Milind. "Study of the Effect of Unidirectional Carbon Fiber in Hybrid Glass Fiber / Carbon Fiber Sandwich Box Beams." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1386188162.
Повний текст джерелаFrieda, Jan. "Administrativní budova." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226910.
Повний текст джерелаKoike, Ayako. "Torsional and flexural control of sandwich composite beams with piezoelectric actuators." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06232009-063235/.
Повний текст джерелаWorrall, Christopher Michael. "The behaviour of composite sandwich beams and panels under low velocity impact conditions." Thesis, University of Liverpool, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333578.
Повний текст джерелаWahyuni, Ade Sri. "Structural characteristics of reinforced concrete beams and slabs with lightweight blocks infill." Thesis, Curtin University, 2012. http://hdl.handle.net/20.500.11937/1874.
Повний текст джерелаWood, Yvette Vanessa. "EFFECTS OF DAMAGE ARRESTMENT DEVICES ON THE FATIGUE LIFE OF IMPACTED COMPOSITE SANDWICH BEAMS." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/955.
Повний текст джерелаLin, Yih Lan, and 林義嵐. "Analysis of Composite Sandwich Beam Subjected to Torsional Loading." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/50976979163870121726.
Повний текст джерелаSharma, Himanshu. "Optimization of a higher-order sandwich composite beam under uncertainties." Thesis, 2021. https://etd.iisc.ac.in/handle/2005/5219.
Повний текст джерелаTseng, Chi-Feng, and 曾頎峰. "Bending stiffness analysis of composite sandwich beam with the application of Taguchi method." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/30569813797491075755.
Повний текст джерела國立臺灣大學
機械工程學研究所
93
The purpose of present study was to find out a best combination level of factors, which would give an optimal bending stiffness of a composite sandwich structure. Taguchi method was used for experiment planning, while bending test was applied based on a standard testing procedure, ASTM-C393, the force-displacement relationship was output. Output data were then used to do S/N ratio and ANOVA analysis, to investigate the contribution of each factor to bending stiffness, and the optimal combination of levels could be predicted. Verification experiment was then carried out to confirm the optimized sandwich beam. Sandwich beams made of composite laminate with foam core were brought to discussion, and the factors considered were: type of laminate, core, and adhesive, and each factor with three levels. After levels of factor were chosen, L9 orthogonal array was used to set each level of factor to form 9 sets of testament. Since the property of the objective function, bending stiffness, which is the larger-the-better, S/N ratio could be calculated, and AVOVA analysis was carried out. The results showed with the combination of CFRP lamination, and foam with density of 100kg/m3, and adhesive Kit 138, there would be an optimal stiffness. Verification test was then carried out to verify the accuracy of the predict value. With the application of Taguchi method, the contributions of each factor to objective function were investigated. Minimal numbers of tests were required to get the result. Without reducing accuracy, the cost and time could be effectively saved. The method was recommended to be a great tool to experiment design.
Hsieh, Tsung-Han, and 謝宗翰. "Dynamic Properties of Composite Beam and Sandwich Structure with MWNTs Reinforcement in Polymer Matrix." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/61831863633226046566.
Повний текст джерела國立清華大學
動力機械工程學系
94
The carbon nanotubes (CNTs) have better mechanical and chemical properties. Researchers used CNTs as reinforcement to fabricate nano- composites. In this study, multi-walled nanotubes (MWNTs) were used to reinforce the polymer resin, and the dynamic properties of the nanocomposites were investigated experimentally. Dynamic properties such as natural frequency and loss factor were measured. When the structure was subjected to dynamic loading, the material used would influence the dynamic characteristics of the structure directly. The addition of MWNTs in the polymer matrix increased the stiffness and natural frequency of the structure, and decreased the effect of resonance. There is good interfacial characteristic between the MWNTs and polymer resin which increased the damping characteristic. In this study, finite element analysis was used to simulate the structural mode shape and natural frequency, and the results were compared to the results obtained from the vibration test. Moreover, Half-Power Bandwidth method was used to calculate the loss factor from the frequency spectrum response. At last, polymeric composites were applied to the core part of the sandwich structure, and graphite/epoxy laminates were applied to be surface material. The effects of different ply-angle on the dynamic characteristics of graphite/epoxy laminates were investigated. Material parameters should be defined in the analysis. The specimen was subjected to tension test. With the test, the mechanical properties of nanocomposites were discussed. Finally, SEM was used to observe the fractured surface of nanocomposites to understand the failure mechanism of the material subject to tension loading and the distribution of the MWNTs in the resin matrix.
Wei-LianDai and 戴維廉. "Applications of the Refined Zigzag Theorem (RZT) to exact solutions of cracked-sandwich-beam and composite beam with functionally graded materials." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/xttj3e.
Повний текст джерела國立成功大學
機械工程學系
107
In this thesis, the refined zigzag theory is used to solve the deflections and stresses of composite sandwich beam. According to the configurations of the sandwich beam, two parts are included in this study. In the first part, the cracked sandwich beam (CSB) is investigated by using the Refined Zigzag Theory (RZT). To solve the displacements, stresses, compliance and energy release reates, the continuity conditions at the crack tip and the boundary conditions are derived. By comparing the results between the theroretical predictions and finite element computations, the solutions by RZT are more accurate than those by FSDT (First-order Shear Deformation Theory). In the present study, parameters such as elastic modulus, shear modulus, layer thickness are considered to investigate their effects on the energy release rates of the CSB. In the second part, the RZT is extended to investigated the sandwich beam with functionally graded material. Various boundary conditions, loading conditions and spacial distribution models are considered to investigated their effects on the FGM sandwich beam. It reveals that the solutions by RZT agree very much with those by FEM and has low computational resources. Material properties equation in thickness direction and the effect of isotropic or orthotropic materials. In general, FGM is an isotropic material. Although FGM with orthotropic material has not developed on the market, it is expected that the numerical simulation results for FGM with orthotropic material presented of this paper will be applied to this new material in the future.
Hu, Jian Shiun, and 胡建勳. "STRUCTURAL ANALYSIS OF DELAMINATED COMPOSITE SANDWICH BEAMS." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/47891724819711718190.
Повний текст джерелаChang, Wen-Chi, and 章雯琦. "Vibration Analysis and Control of Composite Sandwich Beams." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/23791402175914974436.
Повний текст джерела國立成功大學
航空太空工程學系
88
Although some investigations such as buckling, free vibration of composite sandwich beams can be found, it’s rarely seen the research about control and vibration suppression. In our study, we get the closed form solution of free vibration and forced vibration equations and use the mathematical model to control the amplitude of vibration and achieve the vibration reduction in a short time. This investigation uses smart composite beams with surface bonded piezoelectric sensors and actuators. The piezoelectric sensors can respond to structural vibration and generate output voltage due to the direct piezoelectric effect. On the other hand, the actuators can induce force and moment and control the system due to the converse piezoelectric effect. We use linear quadratic Gaussian algorithm to be the classical control method and form a feedback control system, and we choose Kalman estimator as an optimal state observer for a system contaminated with plant noise and measurement noise. The numerical simulation of the vibration control was done with the assist of the software MATLAB toolbox simulink.
Lin, Kai-Pei, and 林凱評. "Compressive Strength of Impact Damaged Composite Sandwich Beams." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/20922434098332899324.
Повний текст джерела國立成功大學
航空太空工程學系
83
Because the composite sandwich structure is made of laminated plates and lack of transverse reinforcement, it is susceptible to damage under impact. Two of the most important damage mechanisms are delamination and buckling of the core. The strength and stiffness of the composite structure are always reduced as resul- ts of two damage types. This would be especically serious for the circumstance of the structure subjected to compression. Thus, delamination may proporgate due to local buckling.Composite sand- wich beams, with or without face-core delamination, objected to compression is studied in this thesis.The delamination on the core-face interface is theoretically computed by employing a fin- ite elemennt method which is based on the mindlin's plate theory and von Karman's large deformation hyperthesis. The two face plates are modeled as two mindlin plates which are connected by the core material. Stress compoments parallel to the face plates in the core are neglected. It is showed that the results have good correlation between the theoretical work and test results. The other important damage mechanism of impact is buckling of the core. This factor will affect the composite sandwish beam very much. Therefore, it is not sufficient to analyze the delamination under impact only con- sidering the delamination on the core-face interface.
Bi, Tien-Yo, and 畢天祐. "The Buckling and Vibration Analysis of the Delaminated Composite Sandwich Beams." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/17543589408612649240.
Повний текст джерела國立成功大學
航空太空工程學系
87
A new theory always need the experiment or other ways to prove . In the literture, there are already having theories talking about the delaminated composite sandwich beams. However, proving it by experiments is necessary. In this thesis, in order to prove that the developed physical model of the delaminated composite sandwich beams is useful, we design the buckling and vibration experiments and reprove it by the results from the finite-element software NASTRAN. At the same time, the providing information in this thesis hopefully can be applied to designing and using the delaminated composite sandwich beams.
Wright, Bryan K. "Validation of Point and Pressure Loading Models for Simply Supported Composite Sandwich Beams." Thesis, 2012. http://hdl.handle.net/1807/33590.
Повний текст джерела