Relevant bibliographies by topics / Plates (Engineering)

Academic literature on the topic 'Plates (Engineering)'

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Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Plates (Engineering)"

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Lim, Teik Cheng. "Auxetic Plates on Auxetic Foundation." Advanced Materials Research 974 (June 2014): 398–401. http://dx.doi.org/10.4028/www.scientific.net/amr.974.398.

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Auxetic solids are materials that exhibit negative Poisson’s ratio. This paper evaluates the maximum stresses in point-loaded (a) auxetic plates on conventional elastic foundation, (b) conventional plates on auxetic elastic foundation, and (c) auxetic plates on auxetic elastic foundation vis-à-vis conventional plates on conventional elastic foundation. Using thick plate theory for infinite plates on elastic foundation, it was found that in most cases the auxetic plates and auxetic foundation play the primary and secondary roles, respectively, in reducing the plate’s maximum stresses. It is herein suggested that, in addition to materials selection technique and other design considerations, the use of auxetic plates and/or auxetic foundation be introduced for reducing stresses in plates on elastic foundations.
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Deng, Lang Ni, Hua Chen, and Kan Kang. "Flexural Strengthening of Reinforced Concrete Beams with Prestressed CFRP Plates." Advanced Materials Research 255-260 (May 2011): 3077–81. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.3077.

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Four medium -scale reinforced concrete beams were constructed and tested to investigate the effectiveness of external poststrengthening with prestressed carbon fiber reinforced polymer (CFRP) plates. The various variables included the strengthening method and the amount of prestressing. The experiments consisted of one control beam, one nonprestressed CFRP-bonded beam, and two prestressed CFRP-bonded beams, all the beams were subjected to four-point bending tests. In comparison to the control beam and the nonprestressed CFRP-bonded beam, the cracking load, yield load, ultimate load and stiffness of the beams with bonded prestressed CFRP plates were increased. The failure mode of the prestressed CFRP-plated beams was not debonding, but concrete crushing. After the debonding of the CFRP plates, the behaviour of the bonded CFRP-plated beams changed to that of unbonded CFRP-plated beams due to the effect of the anchorage system. The ductility of the beams strengthened with CFRP plates having the anchorage system was considered high if the ductility index was above 3.
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Soleimani, Ebrahim, Mohammad Reza Tabeshpour, and Mohammad Saeed Seif. "Parametric study of buckling and post-buckling behavior for an aluminum hull structure of a high-aspect-ratio twin hull vessel." Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment 234, no. 1 (August 24, 2019): 15–25. http://dx.doi.org/10.1177/1475090219868635.

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Metal plates are essential parts of structures such as ship hulls and offshore oil platforms. These plates are typically under compressive axial forces. Hence, one of the main mechanisms for failure and collapse of such structures is buckling of plates. Thus, for safe and secure design, buckling strength of plates should be evaluated. Finite element analysis techniques are perfect tools for this purpose because of the accuracy and flexibility for performing simulations with different variables. In this study, the strength of aluminum plates has been studied using finite element analysis software and it was tried to study the influence of variables such as initial imperfections, plate thickness and aspect ratio on plate strength. It was found that increase in the imperfection magnitude leads to a decrease in the strength of the plate. This is mostly noticed in thin plates because of the plate’s stiffness reduction. Although the plate’s aspect ratio has a slight effect on strength, it has a considerable impact on the failure mechanism. In order to study a combination of plates and stiffeners buckling behavior, part of a high-aspect-ratio twin hull vessel hull structure is assessed under bending moment. It is observed that longitudinal stiffeners at the bottom of the hull in linear analysis undergo the maximum stress, while in non-linear analysis, the maximum stress is spread along with the structure of the deck and bottom, and neutral axis tolerates the minimum stress.
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Voyiadjis, George Z., and Shahram Sarkani. "Engineering Large Deflection Theory for Thick Plates." Journal of Engineering Mechanics 115, no. 5 (May 1989): 935–51. http://dx.doi.org/10.1061/(asce)0733-9399(1989)115:5(935).

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Xiaohui, He, Wang Qiang, Zhang Chenglong, Zhang Shunfeng, and Gao Yaming. "RESEARCH ON A FLUTTER STABILITY CONTROL MEASURE OF A FABRICATED STEEL TRUSS BRIDGE." Transactions of the Canadian Society for Mechanical Engineering 41, no. 2 (June 2017): 181–95. http://dx.doi.org/10.1139/tcsme-2017-1013.

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In order to improve the flutter stability of a certain type fabricated steel truss bridge, a method of setting guiding plates is proposed. Based on the two-dimensional 3 DOF coupling flutter method (2d-3DOF method), and by use of the numerical wind tunnel established by computational fluid dynamics (CFD), the flutter stability control measures of setting guiding plates are simulated. Through CFD numerical simulation, the flow field characteristics, flutter derivatives and critical flutter speed of original and guiding-plated models are obtained. It is found that for a certain type fabricated steel truss bridge, the guiding plates can improve its flutter stability. Thus, the feasibility and reliability of setting the guiding plates are proved, and the foundation for its further application in practical projects is laid.
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Trias Atmadja, Wahyu Mahendra, Herman Parung, Rita Irmawaty, and A. Arwin Amiruddin. "Behavior Hollow Concrete Reinforced Slab with The Utilization of Polyvivyl Chloride Pipe as a Cavity." Open Civil Engineering Journal 15, no. 1 (July 12, 2021): 172–81. http://dx.doi.org/10.2174/1874149502115010172.

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Background: Slab weight can be reduced by replacing the amount of concrete in the tensile area with the utilization of modification polyvinyl chloride pipe as cavity without reducing the flexural strength because the nature of concrete is weak against tensile strength. Methods: This research with the experimental method using static load. The setting of tools refers to the American Society for Testing and Material E 2322, bending analysis is used moment coefficient method, deflection by applying Ugural and Navier method, and shear analysis using Indonesia National Standard 03-2847-2019. Results: The specimens consist of solid plates with a thickness of 140 mm and hollow plates with a thickness of 140 mm and 159 mm. The maximum load capacity solid plate is 410.642 kN, while the hollow plates (140 mm) is 335.18 kN, and for the hollow plates 159 mm is 396.257 kN. The solid plate’s stiffness is 16.321, the hollow plates 140 mm is 14.787 and the hollow plate 159 mm is 24.194, while the ductility is 1.993 on solid plate, the hollow plate 140 mm is 2.014, and the hollow plate 159 mm is 1.862. The solid plate’s damage is flexural, while the two hollow plates are a combination of bending and shear damage. The crack pattern on the solid plates is flexible, while the crack pattern on both hollow plates is a combination of flexural cracks and shear cracks. Conclusion: The use of modified polyvinyl chloride pipes can be recommended in the structure of the plate. There is a small, insignificant difference in the flexural behaviour between the solid plate and hollow concrete reinforced slab with the utilization of Polyvinyl Chloride.
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Belenkiy, Leonid M., Yury N. Raskin, and Alfred Tunik. "Plastic Strength Criterion for Design of Laterally Loaded Ship Plates." Marine Technology and SNAME News 45, no. 02 (April 1, 2008): 63–67. http://dx.doi.org/10.5957/mt1.2008.45.2.63.

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Design of hull plating based on a plastic failure criterion is discussed in this paper. The plating is loaded by high lateral pressure, e.g., slamming or ice loads. The process of plastic deformations as a function of load is analyzed. Experience in establishing in-service permissible permanent deformations of plates is considered as well as early experimental data of plastic failure of plates. Formulations are developed for permanent plastic deflections preceding the plate's failure coupled with a diagram for calculating the plate's permanent deflections when the plastic deflections became large. Sample calculations in this paper are based on the scantlings of a U. S. Coast Guard cutter.
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Alashkar, Adnan, Mohamed Elkafrawy, Rami Hawileh, and Mohammad AlHamaydeh. "Elastic Buckling Behavior of Functionally Graded Material Thin Skew Plates with Circular Openings." Buildings 14, no. 3 (February 21, 2024): 572. http://dx.doi.org/10.3390/buildings14030572.

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This study investigates the elastic buckling behavior of Functionally Graded Material (FGM) thin skew plates featuring a circular opening. FGMs, known for their unique property gradients, have gained prominence in structural engineering due to their mechanical performance and durability. Including a circular opening introduces a critical geometric consideration, influencing the structural stability and load-carrying capacity of FGM plates. The study examines the effects of the skew angle, plate’s aspect ratio, opening position, and size on the critical buckling load, normalized buckling load, and various buckling failure modes through computer modeling and finite element analysis. The results offer valuable insights into the interplay between material heterogeneity, geometric configuration, and structural stability. For instance, the critical buckling load increases by 29%, 82%, and 194% with an increment in skew angle from 0° to 30°, 45°, and 60°, respectively. Moreover, as the opening shifts from the plate’s edge closer to the center, the critical buckling load decreases by 26%. The critical buckling load is also dependent on the power index, as an increase in the power index from 0.2 to 5 reduced the buckling load by 1698 kN. This research contributes to the advancement of our understanding of FGM thin plates’ behavior under skew loading conditions, with implications for the design and optimization of innovative structures. The findings presented provide a foundation for further exploration of advanced composite materials and their applications in structural engineering.
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Wang, James Ting-Shun, and Chien-Chang Lin. "Engineering analysis of buckling of delaminated beam plates." Composite Structures 34, no. 4 (April 1996): 397–407. http://dx.doi.org/10.1016/0263-8223(96)00007-4.

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Kamiñski, Marcin. "Computational Engineering Homogenisation of Steel Reinforced Concrete Plates." Advanced Composites Letters 8, no. 5 (September 1999): 096369359900800. http://dx.doi.org/10.1177/096369359900800502.

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The main subject of the paper is the application of the homogenisation method to the analysis of the elastostatic problem for the steel reinforced concrete plate. The upper and lower bounds on the effective elasticity tensor components as well as direct approximation of the tensor are used to build up the computational model of the structure. The results of numerical analysis are compared against the experimental data. The convergence of experimental and computational data for the real and homogenised composite plate confirms the effectiveness of the homogenisation method applied in the analysis of steel-reinforced uncracked concrete structures. To verify the generality of this approach, analogous tests should be carried out for other types of engineering composite structures, especially in continuous non-linear range.
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Dissertations / Theses on the topic "Plates (Engineering)"

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Paulos, Yonas Kinfu. "Sedimentation between parallel plates." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/30055.

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Settling basins can be shortened by using a stack of horizontal parallel plates which develop boundary layers in which sedimentation can occur. The purpose of this study is to examine the design parameters for such a system and to apply this approach to a fish rearing channel in which settling length is strictly limited. Flow between parallel rough and smooth plates has been modelled together with sediment concentration profile. Accurate description of boundary layer flow requires the solution of Navier-Stokes equations, and due to the complexity of the equations to be solved for turbulent flow some assumptions are made to relate the Reynolds stresses to turbulent kinetic energy and turbulent energy dissipation rate. The simplified equations are solved using a numerical method which uses the approach given by the TEACH code. The flow parameters obtained from the turbulent flow model are used to obtain the sediment concentration profile within the settling plates. Numerical solution of the sedimentation process is obtained by adopting the general transport equation. The lower plate is assumed to retain sediments reaching the bottom. The design of a sedimentation tank for a fish rearing unit with high velocity of flow has been investigated. The effectiveness of the sedimentation tank depends on the uniformity of flow attained at the inlet, and experiments were conducted to obtain the most suitable geometric system to achieve uniform flow distribution without affecting other performances of the fish rearing unit. The main difficulties to overcome were the heavy circulation present in the sedimentation tank and the clogging of the distributing system by suspended particles. Several distributing systems were investigated, the best is discussed in detail. It was concluded that a stack of horizontal parallel plates can be used in fish rearing systems where space is limited for settling sediments. Flow distribution along the vertical at the entrance to the plates determines the efficiency of the sediment settling process and a suitable geometrical configuration can be constructed to distribute the high velocity flow uniformly across the vertical. Numerical modelling of sediment removal ratio for flow between smooth and rough parallel plates has been calculated. The results show that almost the same pattern of sediment deposition occurs for both the smooth-smooth and rough-smooth plate arrangements.
Applied Science, Faculty of
Civil Engineering, Department of
Graduate
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Jeong, Han Koo. "Reliability of laminated composite plates." Thesis, University of Southampton, 1999. https://eprints.soton.ac.uk/21869/.

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This thesis deals with reliability analysis of laminated composite plates subjected to transverse lateral pressure loads. Input parameters to strengths of the plates such as applied transverse lateral pressure loads, elastic moduli, geometric and ultimate strength values of the plates are treated as basic design variables, and specific probability distributions are applied to them to take into account the variability nature of these basic design variables. Based on the statistical information on the basic design variables, these variables are pseudo-randomly generated in accordance with the corresponding probability distributions by using statistical sampling techniques. Generated random values of the basic design variables corresponding to the applied loads, elastic moduli and geometric values are substituted into various laminated plate theories which can accommodate different lamination schemes and boundary conditions to assess the probabilistic strengths of the plates. The limit state equations are developed by using maximum stress, maximum strain, Tsai-Hill, Tsai-Wu, Hoffman and Azzi-Tsai-Hill failure criteria. Calculated probabilistic plate strengths and generated random values of the ultimate strength basic design variables of the plates are substituted into the developed limit state equations to define the failure or survival state of the plates. In solving the limit state equations, structural reliability techniques are adopted and evolved appropriately for the reliability analysis of the plates. Developed reliability analysing algorithms are applied to laminated plates from experiment to check its validity. Finally, the EUROCOMP Design Code is compared with the developed reliability analysis procedures by applying the both approaches to the strengths of laminated plates.
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Putra, Azma. "Sound radiation from perforated plates." Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/63161/.

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Perforated plates are quite often used as a means of engineering noise control to reduce the sound radiated by structures. However, there appears to be a lack of representative models to determine the sound radiation from a perforated plate. The aim of this thesis is to develop such a model that can be used to give quantitative guidance corresponding to the design and effectiveness of this noise control measure. Following an assessment of various models for the radiation efficiency of an unbaffled plate, Laulagnet’s model is implemented. Results are calculated and compared with those for baffled plates. From this, simple empirical formulae are developed and give a very good agreement with the analytical result. Laulagnet’s model is then modified to include the effect of perforation in terms of a continuously distributed surface impedance to represent the holes. This produces a model for the sound radiation from a perforated unbaffled plate. It is found that the radiation efficiency reduces as the perforation ratio increases or as the hole size reduces. An approximate formula for the effect of perforation is proposed which shows a good agreement with the analytical calculation up to half the critical frequency. This could be used for an engineering application to predict the noise reduction due to perforation. The calculation for guided-guided boundary conditions shows that the radiation efficiency of an unbaffled plate is not sensitive to the edge conditions. It is also shown that perforation changes the plate bending stiffness and mass and hence increases the plate vibration. The situation is also considered in which a perforated unbaffled plate is located close to a reflecting rigid surface. This is established by modifying the Green’s function in the perforated unbaffled model to include an imaginary source to represent the reflected sound. The result shows that the presence of the rigid surface reduces the radiation efficiency at low frequencies. The limitation of the assumption of a continuous acoustic impedance is investigated using a model of discrete sources. The perforated plate is discretised into elementary sources representing the plate and also the holes. It is found that the uniform surface impedance is only valid if the hole distance is less than an acoustic wavelength for a vibrating rectangular piston and less than half an acoustic wavelength for a rectangular plate in bending vibration. Otherwise, the array of holes is no longer effective to reduce the sound radiation. Experimental validation is conducted using a reciprocity technique. A good agreement is achieved between the measured results and the theoretical calculation for both the unbaffled perforated plate and the perforated plate near a rigid surface.
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CHAKRABARTI, SEKHAR KUMAR. "INELASTIC BUCKLING OF GUSSET PLATES." Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184188.

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The strength and behavior of gusset plates in buckling is evaluated herein based on data from the experimental investigations conducted by other researchers and the analytical work presented herein. A set of design guidelines has been recommended through the review of the current practice. Representative single and double brace gusset plates normally adopted for connections with compressive bracing/diagonal members in braced frames and trusses, were modeled and analyzed using linear and nonlinear finite element methods to determine the buckling loads. The buckling analysis data along with the test data indicated the occurrence of inelastic buckling of the gusset plates. Current design practice and a set of formulas for determination of gusset plate thickness have been reviewed. A set of guidelines has been recommended for the design and evaluating gusset plate buckling loads.
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Lumpp, Dirk Manfred. "An experimental investigation of circular plates, beams and stiffened circular plates subjected to impulsive loading." Master's thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/9658.

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Bibliography: leaves 94-96.
This primarily experimental investigation describes a series of experiments on fully-clamped circular plates, rectangular beams and stiffened circular plates. These test specimens were subjected to a uniformly distributed impulse. The impulse was provided by plastic explosive. This was arranged in such a way that a uniformly distributed impulse was imparted to the test specimens. The impulse was measured by means of a ballistic pendulum to which the test specimens were attached. The final mid-point deflections of the plates and beams were measured. The plate and beam results were compared to previous experimental work. A non-dimensional number for plates was modified to include an experimental mass scaling factor due to the ballistic pendulum mass. A non-dimensional number for rectangular beams was developed, including a similar experimental mass scaling factor. Comparing the beam and plate results from this study with those of previous work, using the respective non-dimensional numbers, showed good correlation. The results for the stiffened plates are compared with the plate results.
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Abayakoon, Sarath Bandara Samarasinghe. "Large deflection elastic-plastic analysis of plate structures by the finite strip method." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26946.

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A solution procedure based on the finite strip method is presented herein, for the analysis of plate systems exhibiting geometric and material non-linearities. Special emphasis is given to the particular problem of rectangular plates with stiffeners running in a direction parallel to one side of the plate. The finite strip method is selected for the analysis as the geometry of the problem is well suited for the application of this method and also as the problem is too complicated to solve analytically. Large deflection effects are included in the present study, by taking first, order non-linearities in strain-displacement relations into account. Material non-linearities are handled by following von-Mises yield criterion and associated flow rule. A bi-linear stress-strain relationship is assumed for the plate material, if tested under uniaxial conditions. Numerical integration of virtual work equations is performed by employing Gauss quadrature. The number of integration points required in a given direction is determined either by observing the individual terms to be integrated or by previous experience. The final set of non-linear equations is solved via a Newton-Raphson iterative scheme, starting with the linear solution. Numerical investigations are carried out by applying the finite strip computer programme to analyse uniformly loaded rectangular and I beams with both simply supported and clamped ends. Displacements, stresses and moments along the beam are compared with analytical solutions in linear analyses and with finite element solutions in non-linear analyses. Investigations are also extended to determine the response of laterally loaded square plates with simply supported and clamped boundaries. Finally, a uniformly loaded stiffened panel is analysed and the results are compared with finite element results. It was revealed that a single mode in the strip direction was sufficient to yield engineering accuracy for design purposes, with most problems.
Applied Science, Faculty of
Civil Engineering, Department of
Graduate
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Mseikeh, Camille Hanna. "Wrinkling of membranes, plates, and shells." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ30343.pdf.

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Ko, Kwang Hee 1971. "Laser measurement and reconstruction of curved plates." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/91350.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.
Includes bibliographical references (leaves 86-89).
by Kwang Hee Ko.
S.M.
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Malaret, Hiram A. (Hiram Anthony). "Mechanisms in thermal mechanical forming of plates." Thesis, Massachusetts Institute of Technology, 1987. http://hdl.handle.net/1721.1/14865.

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Mürk, Annely. "Optimization of inelastic plates with cracks /." Online version, 2006. http://dspace.utlib.ee/dspace/bitstream/10062/1226/5/murkannely.pdf.

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Books on the topic "Plates (Engineering)"

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Gould, Phillip L. Analysis of Shells and Plates. New York, NY: Springer New York, 1988.

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Gould, Phillip L. Analysis of shells and plates. New York: Springer-Verlag, 1988.

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Gould, Phillip L. Analysis of shells and plates. Upper Saddle River, N.J: Prentice Hall, 1999.

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Sawzcuk, A. Limit analysis of plates. Warszawa: Polish Scientific Publishers, 1993.

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1932-, Gilbert Robert P., and Hackl K, eds. Asymptotic theories for plates and shells. Harlow, Essex, England: Longman Scientific & Technical, 1995.

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Ugural, A. C. Stresses in plates and shells. 2nd ed. Boston, Mass: WCB/McGraw Hill, 1998.

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

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United States. National Aeronautics and Space Administration., ed. Hierarchic models for laminated plates. Saint Louis, Mo: Washington University, Sever Institute of Technology, 1991.

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H, Wittrick W., and Dawe D. J, eds. Aspects of the analysis of plate structures: A volume in honour of W.H. Wittrick. Oxford [Oxfordshire]: Oxford University Press, 1985.

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Birman, V. Plate Structures. Dordrecht: Springer Science+Business Media B.V., 2011.

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Book chapters on the topic "Plates (Engineering)"

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Baghdasaryan, Gevorg, and Marine Mikilyan. "Superconducting Plates." In Foundations of Engineering Mechanics, 197–245. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19162-1_8.

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Manevitch, Leonid I., Victor G. Oshmyan, and Igor V. Andrianov. "Reinforced plates." In Foundations of Engineering Mechanics, 76–127. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-540-44571-5_5.

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Manevitch, Leonid I., Victor G. Oshmyan, and Igor V. Andrianov. "Corrugated plates." In Foundations of Engineering Mechanics, 188–211. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-540-44571-5_8.

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Alfutov, N. A. "Stability of Plates." In Foundations of Engineering Mechanics, 143–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-540-49098-2_4.

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Ambartsumian, Sergey A. "Bending of Plates." In Foundations of Engineering Mechanics, 7–36. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71326-3_2.

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Vijayakumar, Kaza, and Girish Kumar Ramaiah. "Homogeneous Anisotropic Plates." In Springer Tracts in Mechanical Engineering, 49–67. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4210-1_3.

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Berthelot, Jean-Marie. "Theory of Sandwich Plates." In Mechanical Engineering Series, 382–91. New York, NY: Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4612-0527-2_18.

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Doyle, James F. "Thin Plates and Shells." In Mechanical Engineering Series, 90–168. New York, NY: Springer New York, 2001. http://dx.doi.org/10.1007/978-1-4757-3546-8_3.

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Chakrabarty, J. "Plastic Bending of Plates." In Mechanical Engineering Series, 225–96. New York, NY: Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4757-3268-9_4.

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Chakrabarty, J. "Plastic Bending of Plates." In Mechanical Engineering Series, 227–312. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-77674-3_4.

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Conference papers on the topic "Plates (Engineering)"

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Sancaktar, E., A. Y. Asiri, and G. S. Kumar. "A Novel Economical Method to Improve the Toughness of Carbon/Epoxy Long Fiber Components by the Integration of Tow Loops Cores." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59354.

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In this research, solid and sandwich carbon/epoxy composite plates were developed, fabricated, and tested at two different crosshead speeds of 10 and 500 mm/min, under monotonic penetration tests, which perpendicularly applied a concentrated load to the simply supported plates. The cores of sandwich plates were made of carbon prepreg (with epoxy resin), as well as glass tow loops (without resin). The plates’ lay-up configuration sequence was {[0/90]n}s, where n was 1, 2 or 4. The objectives of this study were to determine the general sandwich plate behavior, as well as to analyze the effects of the test rate, the number of internal loops and the number of plate facesheet plies on the failure mode, ultimate plate deflection, ultimate load, plate’s flexural rigidity, plate’s absorbed energy, and the extent of damage. The use of carbon fiber prepreg tow loops impregnated with epoxy resin, as well as dry glass tow loops without any resin provided information on the effect of resin presence in these core layers. For these purposes, the load versus plate deflection data were recorded and analyzed. The load-deflection curves were used to interpret the plate behavior in terms of flexural rigidity and absorbed energy. The plate’s absorbed energy values at both speeds were used to assist in the dynamic response analysis. The results of our experiments revealed that, at higher loading rates, the internal loops of carbon prepreg material with epoxy resin enhanced the energy absorption capability of the plates more significantly than those containing dry glass tow loops without resin impregnation.
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Chen, Yongbo, Masoud Hayatdavoodi, Binbin Zhao, and R. Cengiz Ertekin. "Wave Attenuation by Submerged Oscillating Plates." In ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/omae2023-105070.

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Abstract Submerged oscillating plates are used as heaving plates to reduce the motion of floating objects, in wave energy devices to extract the wave energy, and as breakwaters to attenuate the wave field in shallow water. In this study, we consider a horizontal, submerged plate in shallow water that is allowed to oscillate in the vertical direction due to the wave loads. The plate is attached to a linear spring and damper to control the oscillations. The focus of this study is on the transformation of the wave field by the submerged oscillating plate. To estimate the energy attenuation, wave reflection and transmission coefficients are determined from four wave gauges; two placed upwave and two placed downwave of the oscillating plate. The fluid is governed by the nonlinear Level I Green-Naghdi (GN) equations, coupled with the equations of vertical motion of the plate to determine its oscillations. Time series of water surface elevation recorded at gauges upwave and downwave of the plate, and the wave-induced plate oscillations, obtained by the GN model are compared with available laboratory experiments and other data, and very good agreement is observed. Wave reflection and transmission coefficients are then determined for a range of involved parameters, including wave condition (wave height and wave period), initial submergence depth of the plate, plate length, and the spring-damper system. It is found that a single submerged oscillating plate can have remarkable effect on the wave field, and that nonlinearity plays an important role in this wave-structure interaction problem. Discussion is provided on how the wave reflection and transmission vary with the wave condition, plate characteristic, initial submergence depth and spring-damper system.
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Caruntu, Dumitru I., and Iris Alvarado. "Influence of van der Waals Forces on Electrostatically Actuated MEMS/NEMS Circular Plates." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63798.

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This paper deals with electrostatically actuated micro and nano-electromechanical (MEMS/NEMS) circular plates. The system under investigation consists of two bodies, a deformable and conductive circular plate placed above a fixed, rigid and conductive ground plate. The deformable circular plate is electrostatically actuated by applying an AC voltage between the two plates. Nonlinear parametric resonance and pull-in occur at certain frequencies and relatively large AC voltage, respectively. Such phenomena are useful for applications such as sensors, actuators, switches, micro-pumps, micro-tweezers, chemical and mass sensing, and micro-mirrors. A mathematical model of clamped circular MEMS/NEMS electrostatically actuated plates has been developed. Since the model is in the micro- and nano-scale, surface forces, van der Waals and/or Casimir, acting on the plate are included. A perturbation method, the Method of Multiple Scales (MMS), is used for investigating the case of weakly nonlinear MEMS/NEMS circular plates. Two time scales, fast and slow, are considered in this work. The amplitude-frequency and phase-frequency response of the plate in the case of primary resonance are obtained and discussed.
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Tubaldi, E., M. Amabili, and F. Alijani. "Nonlinear Vibrations of Plates in Axial Pulsating Flow." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37283.

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A theoretical approach is presented to study nonlinear vibrations of thin infinitely long rectangular plates subjected to pulsatile axial inviscid flow. The case of plates in axial uniform flow under the action of constant transmural pressure is also addressed for different flow velocities. The equations of motion are obtained based on the von Karman nonlinear plate theory retaining in-plane inertia via Lagrangian approach. The fluid model is based on potential flow theory and the Galerkin method is applied to determine the expression of the flow perturbation potential. The effect of different system parameters such as flow velocity, pulsation amplitude, pulsation frequency, and channel pressurization on the stability of the plate and its geometrically nonlinear response to pulsating flow are fully discussed. In case of zero uniform transmural pressure numerical results show hardening type behavior for the entire flow velocity range when the pulsation frequency is spanned in the neighbourhood of the plate’s fundamental frequency. Conversely, a softening type behavior is presented when a uniform transmural pressure is introduced.
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Abrate, Serge. "Vibration of Functionally Graded Plates." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95778.

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This article considers the free vibration of plates for which materials properties vary continuously though the thickness. First, an examination of results available in the literature led to the discovery that the natural frequencies of such functionally graded plates are proportional to those of isotropic plates. In the usual formulation of existing plate theories, the midplane is taken as the reference surface and the variation in material properties through the thickness leads to coupling between inplane and bending deformations. The second part of this paper shows that it is possible to select a different reference plane so that this coupling is eliminated and the motion of the graded plate is governed by the same equation as that of homogeneous isotropic plates. This explains the relationship between the natural frequencies that was observed in the results presented by previous investigators. The study of functionally graded plate is made much simpler and results available for isotropic plates can be used directly.
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Wang, Quandou, Johannes A. Soons, and Ulf Griesmann. "Holographic radius test plates." In SPIE Optical Engineering + Applications, edited by Oliver W. Fähnle, Ray Williamson, and Dae Wook Kim. SPIE, 2013. http://dx.doi.org/10.1117/12.2024890.

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Koledintseva, Marina, Sandeep K. R. Chandra, J. Drewniak, and James A. Lenn. "Engineering of Absorbing Gaskets Between Metal Plates." In 2007 IEEE International Symposium on Electromagnetic Compatibility. IEEE, 2007. http://dx.doi.org/10.1109/isemc.2007.120.

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Sorohan, Stefan, Ioan Parausanu, Adrian Motomancea, and Dumitru I. Caruntu. "Dynamic Analysis of Composite Plates." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-82252.

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The paper presents comparatively the measured and estimated natural frequencies and mode shapes of a rectangular orthotropic panel. The experimental tests were performed using a shaker. The plate was fixed in horizontal position directly on the shaker armature using a rigid rod. The experimental modes shapes were visualized using sand particles. The measured natural frequencies and also the modes shapes correspond to the whole system in motion. So, the analytic model of the plate must include the effect of the vibrator connected to the plates. The purpose of this experimental measurements and analytic modeling of such plates is to further developing a methodology to estimate the material properties of the composite panels. At this research stage, an orthotropic plate with unknown material properties was investigated. Using an adequate finite element model, the mechanical properties of the material were estimated. Using these properties it is possible to numerically estimate the dynamic behavior of the plate for additional sets of boundary conditions.
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Park, Chul H., and A. Baz. "Newtonian and Variational Formulations of the Vibrations of Plates With Active Constrained Layer Damping." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/vib-21738.

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Abstract This paper presents Newtonian and variational formulations of the dynamics of plates treated fully with Active Constrained Layer Damping (ACLD). The developed equations of the plate/ACLD system provide analytical models for predicting the dynamic of laminated plates subjected to passive and active vibration damping controls. Numerical solutions of the analytical models are presented for simply-supported plates in order to study the performance of the plate/ACLD system for different control strategies. The developed models present invaluable means for designing and predicting the performance of the smart laminated plates that can be used in many critical engineering applications.
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Wang, J., M. J. Downie, and J. M. R. Graham. "Mean and Oscillatory Flows Past Porous Plates." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32495.

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This paper reports on a study that has been carried out into the flow fields induced by mean and oscillatory flows incident on porous plates normal to the flow. The motivation for this work is the possibility of using porous plates to modify the damping and added mass of bodies floating in waves with a view to reducing their motion. A series of experiments including sea keeping experiments, flow visualization experiments and numerical simulations have been carried out for both solid plate and porous plates in the context of their effectiveness as bilge keels designed to damp the motions of floating structures. The porous plate with small size holes has been shown to be a more efficient damping device more often than the solid one. Both plates produce a pressure drag arising from flow separation that damps the motion, but the proportion of drag to total force is greater in the case of the porous plate.
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Reports on the topic "Plates (Engineering)"

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Melik-Sargsyan, Lusine. SCIENTIFIC AND ENGINEERING ISSUES AND CHALLENGES OF PHYSICAL SEPARATION OF SAFETY SYSTEMS OF OLD GENERATION NUCLEAR POWER PLANTS. Eurasia Institutes, June 2023. http://dx.doi.org/10.47669/iser-2-2023.

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This article discusses the scientific and engineering issues and criticality of physical separation of safety systems of old generation nuclear power plants. Based on the scientific and engineering comprehensive analyses within the framework of this scientific and research work it has been concluded that the physical separation of safety systems at old generation nuclear power plants like Armenian NPP was among deficiencies of VVER 440 reactors identified in with high ranking.
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Whitfield, Paula, Jenny Davis, Amanda Tritinger, Danielle Szimanski, Rebecca Golden, Joseph Gailani, Michael Ramirez, Brook Herman, Matt Whitbeck, and Jeffery King. Swan Island : monitoring and adaptive management plan. Engineer Research and Development Center (U.S.), August 2022. http://dx.doi.org/10.21079/11681/45044.

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Swan Island is a 10.12 ha island located in the Maryland waters of the Chesapeake Bay. Because of its value as a natural wave break for the town of Ewell on nearby Smith Island, as well as the ongoing erosion and subsidence of the island, in 2019 US Army Corps of Engineers (USACE)–Baltimore District placed 45,873 m³ of dredged sediment and planted 200,000 marsh plants. This restoration provided an opportunity to quantify the engineering (that is, resilience) and ecological performance of the island, postplacement. The lack of quantitative data on the performance of natural features such as islands has led to perceived uncertainties that are often cited as barriers to implementation. To address these data gaps, a multidisciplinary collaboration of five government entities identified project objectives and monitoring parameters through a series of mediated workshops and then developed a conceptual model to articulate those parameters and the linkages between them. This monitoring and adaptive management plan (MAMP) documents those monitoring parameters and procedures and can serve as an example for other scales, regions, and research questions. Documenting research and monitoring efforts may help to foster widespread acceptance of nature-based solutions such as islands.
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Johra, Hicham. Description of the Guarded Hot Plate Method for Thermal Conductivity Measurement with the EP500. Department of the Built Environment, Aalborg University, December 2019. http://dx.doi.org/10.54337/aau317020205.

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The aim of this lecture note is to detail the methodology of the Guarded Hot Plate method for the measurement of thermal conductivity of medium-size test samples. Such measurements can be conducted with the Guarded Hot Plate apparatus EP500 (Lambda-Messtechnik GmbH Dresden) at the Building Material Characterization Laboratory of Aalborg University - Department of Civil Engineering.
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Enscore, Susan, Adam Smith, and Megan Tooker. Historic landscape inventory for Knoxville National Cemetery. Engineer Research and Development Center (U.S.), April 2021. http://dx.doi.org/10.21079/11681/40179.

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This project was undertaken to provide the U.S. Department of Veterans Affairs National Cemetery Administration with a cultural landscape survey of Knoxville National Cemetery. The 9.8-acre cemetery is located within the city limits of Knoxville, Tennessee, and contains more than 9,000 buri-als. Knoxville National Cemetery was placed on the National Register of Historic Places on 12 September 1996, as part of a multiple-property submission for Civil War Era National Cemeteries. The National Cemetery Administration tasked the U.S. Army Engineer Re-search and Development Center-Construction Engineering Research Laboratory (ERDC-CERL) to inventory and assess the cultural landscape at Knoxville National Cemetery through creation of a landscape development context, a description of current conditions, and an analysis of changes over time to the cultural landscape. All landscape features were included in the survey because according to federal policy on National Cemeteries, all national cemetery landscape features are considered to be contributing elements.
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Ahmed Badran, Ahmed Badran. Improving the CO2 Capture Efficiency of Plants Through Enzyme Engineering. Experiment, October 2023. http://dx.doi.org/10.18258/56427.

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Mizrach, Amos, Michal Mazor, Amots Hetzroni, Joseph Grinshpun, Richard Mankin, Dennis Shuman, Nancy Epsky, and Robert Heath. Male Song as a Tool for Trapping Female Medflies. United States Department of Agriculture, December 2002. http://dx.doi.org/10.32747/2002.7586535.bard.

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This interdisciplinaray work combines expertise in engineering and entomology in Israel and the US, to develop an acoustic trap for mate-seeking female medflies. Medflies are among the world's most economically harmful pests, and monitoring and control efforts cost about $800 million each year in Israel and the US. Efficient traps are vitally important tools for medfly quarantine and pest management activities; they are needed for early detection, for predicting dispersal patterns and for estimating medfly abundance within infested regions. Early detection facilitates rapid response to invasions, in order to contain them. Prediction of dispersal patterns facilitates preemptive action, and estimates of the pests' abundance lead to quantification of medfly infestations and control efforts. Although olfactory attractants and traps exist for capturing male and mated female medflies, there are still no satisfactorily efficient means to attract and trap virgin and remating females (a significant and dangerous segment of the population). We proposed to explore the largely ignored mechanism of female attraction to male song that the flies use in courtship. The potential of such an approach is indicated by studies under this project. Our research involved the identification, isolation, and augmentation of the most attractive components of male medfly songs and the use of these components in the design and testing of traps incorporating acoustic lures. The project combined expertise in acoustic engineering and instrumentation, fruit fly behavior, and integrated pest management. The BARD support was provided for 1 year to enable proof-of-concept studies, aimed to determine: 1) whether mate-seeking female medflies are attracted to male songs; and 2) over what distance such attraction works. Male medfly calling song was recorded during courtship. Multiple acoustic components of male song were examined and tested for synergism with substrate vibrations produced by various surfaces, plates and loudspeakers, with natural and artificial sound playbacks. A speaker-funnel system was developed that focused the playback signal to reproduce as closely as possible the near-field spatial characteristics of the sounds produced by individual males. In initial studies, the system was tasted by observing the behavior of females while the speaker system played songs at various intensities. Through morning and early afternoon periods of peak sexual activity, virgin female medflies landed on a sheet of filter paper at the funnel outlet and stayed longer during broadcasting than during the silent part of the cycle. In later studies, females were captured on sticky paper at the funnel outlet. The mean capture rates were 67 and 44%, respectively, during sound emission and silent control periods. The findings confirmed that female trapping was improved if a male calling song was played. The second stage of the research focused on estimating the trapping range. Initial results indicated that the range possibly extended to 70 cm, but additional, verification tests remain to be conducted. Further studies are planned also to consider effects of combining acoustic and pheromonal cues.
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Strand, Stuart E. Genetic Engineering of Plants to Improve Phytoremediation of Chlorinated Hydrocarbons in Groundwater. Office of Scientific and Technical Information (OSTI), December 2004. http://dx.doi.org/10.2172/850327.

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Reddy, Anireddy S. Metabolic Engineering of Plants to Produce Precursors (Phloroglucinol and 1,2,4-butanetriol) of Energetic Materials. Fort Belvoir, VA: Defense Technical Information Center, January 2009. http://dx.doi.org/10.21236/ada548873.

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Reddy, Anireddy S. Metabolic Engineering of Plants to Produce Precursors (Phloroglucinol and 1,2,4-butanetriol) of Energetic Materials. Fort Belvoir, VA: Defense Technical Information Center, January 2010. http://dx.doi.org/10.21236/ada548908.

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Reddy, Anireddy S. Metabolic Engineering of Plants to Produce Precursors (Phloroglucinol and 1,2,4-butanetriol) of Energetic Materials. Fort Belvoir, VA: Defense Technical Information Center, January 2015. http://dx.doi.org/10.21236/ada615593.

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