Relevant bibliographies by topics / Truncated Cone Model

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Truncated Cone Model'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Truncated Cone Model"

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Cojocaru, Dorian, Giuseppe Boccolato, Ionut Dinulescu, Alice Predescu, Florin Manta, and Sorin Dumitru. "3D Control for a Truncated Cone Tentacle Kinematics." Solid State Phenomena 166-167 (September 2010): 127–32. http://dx.doi.org/10.4028/www.scientific.net/ssp.166-167.127.

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This paper presents the architecture, simulation, implementation and control problem for a class of continuum manipulators – the truncated cone tentacle arm. Desired shape for a tentacle robot is obtained by bending each of the three serial connected sections of a continuous backbone. Such tentacle arm has a fixed length but it can achieve any position and orientation in 3D space. A tentacle arm prototype was designed and the practical realization is now running. For this prototype we present a finite element model, for simulation purposes, we propose a kinematic model to be used in the control structure, and we conducted a series of tests regarding the structure behavior, using both sensor and artificial vision analysis. In this paper we present the results of our work.
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Zhao, Meng, Jun Mao, and Guo Wei Yang. "Research on Compressible Flow around Cylinder and Truncated Cone with LES Method." Advanced Materials Research 919-921 (April 2014): 210–15. http://dx.doi.org/10.4028/www.scientific.net/amr.919-921.210.

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Numerical simulation with the large eddy simulation, filter function, and Smagorinsky sub-grid scale model is adopted to simulate the compressible flow around a bluff body finite length circular cylinder and truncated cone in high Reynolds number. The law of the drag coefficient, lift coefficient and pressure coefficient obtained from models with various cross-wind speeds was discussed. Process of the vortex generated, shed and dissipated was analyzed and the relationship between the press filed, velocity filed and vortex filed was also analyzed. Average value of the drag coefficient, lift coefficient and pressure coefficient of the circle cylinder in subcritical region are greater than truncated cone. Values of pressure coefficient on the windward side of all the models are consistent. However, it various widely on the leeward side, even on the end face of the cone and cylinder.
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Mao, Qianjun, Ning Liu, and Li Peng. "Numerical Investigations on Charging/Discharging Performance of a Novel Truncated Cone Thermal Energy Storage Tank on a Concentrated Solar Power System." International Journal of Photoenergy 2019 (January 27, 2019): 1–17. http://dx.doi.org/10.1155/2019/1609234.

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Developing a concentrated solar power (CSP) technology is one of the most effective methods to solve energy shortage and environmental pollution all over the world. Thermal energy storage (TES) system coupling with phase change materials (PCM) is one of the most significant methods to mitigate the intermittence of solar energy. In this paper, firstly, a 2D physical and mathematical model of a novel truncated cone shell-and-tube TES tank has been proposed based on enthalpy method. Secondly, the performance during the charging/discharging process of the truncated cone tank has been compared with the traditional cylindrical tank. Finally, the effects of inlet conditions of heat transfer fluid (HTF), and thickness of tube on the charging/discharging process, stored/released energy capacity; energy storage/release rate and heat storage efficiency have been investigated. The results show that the performance of truncated cone tank is better, and the charging/discharging time reduces 32.08% and 21.59%, respectively, compared with the cylindrical tank. The effect of wall thickness on the truncated cone TES tank can be ignored. And the inlet temperature and velocity of HTF have the significant influence on the charging/discharging performance of TES tank. And the maximum heat storage efficiency of the truncated cone TES tank can reach 93%. However, some appropriate methods should be taken for improving the thermal energy utilization rate of HTF in the future. This research will provide insights and significant reference towards geometric design and operating conditions in TES system.
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Pour, Hadi Samareh Salavati, Mojtaba Sadighi, and Abdolvahed Kami. "Optimization of the Composite Truncated Cone Structure Layers under Buckling Load." Applied Mechanics and Materials 225 (November 2012): 144–49. http://dx.doi.org/10.4028/www.scientific.net/amm.225.144.

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The orientation of fibers in the layers is an important factor that must be obtained in order to predict how well the finished composite product will perform under real-world working conditions. In this research, a five-layer glass-epoxy composite truncated cone structure under buckling load was considered. The simulation of the structure was done utilizing finite element method and was confirmed comparing with the published experimental results. Then the effect of different orientation of fibers on the buckling load was considered. For this, a computer programing was developed to compute the buckling load for different orientations of fibers in each layer. These orientations were produced randomly with the delicacy of 15 degrees. Finally, neural network and genetic algorithm methods were utilized to obtain the optimum orientations of fibers in each layer using the training data obtained from finite element simulation. There are many parameters such as the number of hidden layers, the number of neurons in each hidden layer, the training algorithm, the activation function and so on which must be specified properly in development of a neural network model. The number of hidden layers and number of neurons in each layer was obtained by try and error method. In this study, multilayer back-propagation (BP) neural network with the Levenberg-Marquardt training algorithm (trainlm) was used. Finally, the results showed that the truncated cone with optimum layers withstand considerably more buckling load.
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Chen, Pengcheng, Weijing Niu, Xiaopeng Yan, and Guoyun Lu. "Theoretical model for dynamic response of aluminum foam sandwich targets by truncated cone-nosed projectiles." Journal of Sandwich Structures & Materials 20, no. 2 (2016): 249–67. http://dx.doi.org/10.1177/1099636216664288.

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Based on classical dynamic cylindrical cavity expansion theory, a nine-step penetration and perforation process of aluminum foam sandwich targets by truncated cone-nosed projectiles are developed theoretically. In the theoretical model, the friction, shear strength, and the force for tearing the cells in the core at the periphery of the projectile are considered, and the resistance force and instantaneous velocity are achieved from this process. On this basis, the effects of the geometry of projectiles, core thickness, and impact velocities of projectiles on absorbed energy are also analyzed. Simple composite failure criteria will be applied in the fracture and perforation of the face sheet, core, and back sheet. It is shown that the diameter of projectile and core thickness have significant influence on the ballistic velocity of the projectile, which is important for the impact response and absorbed energy of the sandwich. Numerical simulation at various impact velocities is also performed, and there is a good agreement between the numerical predictions and the analytical measurements.
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Lv, Zhexin, Sirong Yu, Xue Zhou, Di Liu, Enyang Liu, and Yan Zhao. "Preparation of a superhydrophobic coating on 6061Al alloy substrate and its simplified truncated cone model." Journal of Coatings Technology and Research 16, no. 4 (2019): 933–48. http://dx.doi.org/10.1007/s11998-018-00168-0.

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Cruz de León, Gildardo, and José Cruz de León. "The segmental conic model for forest measurements." Madera y Bosques 12, no. 2 (2016): 91–96. http://dx.doi.org/10.21829/myb.2006.1221245.

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A close analysis of traditional geometries and volume equations in forest measurements lead us to propose the use of conic geometry by segments as an alternative method to approach the whole form of any regular tree bole, log or bolt. The model is general and applies to any solid of revolution and is supported on the truncated cone volume equation. It is called The Segmental Conic Model. The model accuracy depends on the number of segments and is exact in the limit when that number goes to infinity.
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Pătrulescu, F. O., T. Groşan, and I. Pop. "Mixed convection boundary layer flow from a vertical truncated cone in a nanofluid." International Journal of Numerical Methods for Heat & Fluid Flow 24, no. 5 (2014): 1175–90. http://dx.doi.org/10.1108/hff-11-2012-0267.

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Purpose – The purpose of this paper is to investigate the steady mixed convection boundary layer flow from a vertical frustum of a cone in water-based nanofluids. The problem is formulated to incorporate three kinds of nanoparticles: copper, alumina and titanium oxide. The working fluid is chosen as water with the Prandtl number of 6.2. The mathematical model used for the nanofluid incorporates the particle volume fraction parameter, the effective viscosity and the effective thermal diffusivity. The entire regime of the mixed convection includes the mixed convection parameter, which is positive for the assisting flow (heated surface of the frustum cone) and negative for the opposing flow (cooled surface of the frustum cone), respectively. Design/methodology/approach – The transformed non-linear partial differential equations are solved numerically for some values of the governing parameters. The derivatives with respect to? were discretized using the first order upwind finite differences and the resulting ordinary differential equations with respect to? were solved using bvp4c routine from Matlab. The absolute error tolerance in bvp4c was 1e-9. Findings – The features of the flow and heat transfer characteristics for different values of the governing parameters are analysed and discussed. The effects of the particle volume fraction parameter \phi, the mixed convection parameter \lambda and the dimensionless coordinate? on the flow and heat transfer characteristics are determined only for the Cu nanoparticles. It is found that dual solutions exist for the case of opposing flows. The range of the mixed convection parameter for which the solution exists increases in the presence of the nanofluids. Originality/value – The paper models the mixed convection from a vertical truncated cone using the boundary layer approximation. Multiple (dual) solutions for the flow reversals are obtained and the range of existence of the solutions was found. Particular cases for ?=0 (full cone), ? >>1 and (free convection limit) \lambda>>1were studied. To the authors best knowledge this problem has not been studied before and the results are new and original.
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Ahmed, Baqer Ayad, Saad Kariem Shather, and Wisam Kadhim Hamdan. "Statistical Analysis of Metal Removal during Magnetic Abrasive Finishing Process." Journal of Engineering 26, no. 8 (2020): 34–45. http://dx.doi.org/10.31026/j.eng.2020.08.03.

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This work aims to provide a statistical analysis of metal removal during the Magnetic Abrasive Finishing process (MAF) and find out the mathematical model which describes the relationship between the process parameters and metal removal, also estimate the impact of the parameters on metal removal. In this study, the single point incremental forming was used to form the truncated cone made of low carbon steel (1008-AISI) based on the Z-level tool path. Then the finishing was accomplished using a magnetic abrasive process based on the Box-Behnken design of the experiment using Minitab 17 software was used to finish the surface of the formed truncated cone. The influences of different parameters (feed rate, machining step size, coil current, and spindle speed) on metal removal were (32.948, 21.896, 10.587, and 13.907) %, respectively.
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Ma, L.-W., and J.-H. Mo. "Three-dimensional finite element method simulation of sheet metal single-point incremental forming and the deformation pattern analysis." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 222, no. 3 (2008): 373–80. http://dx.doi.org/10.1243/09544054jem957.

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Further research of the sheet metal single-point incremental forming (SPIF), which is a flexible sheet metal numerical forming method without dedicated dies, has used finite element method (FEM) simulation to analyse the forming principle and the effect of process parameters on the forming. In SPIF, the located region of the blank in contact with the forming tool is formed incrementally along the trajectory. There is no symmetric load and geometry condition, so the FEM model could not be simplified to a symmetrical model and the efficiency of simulation is bad. In this paper, brick elements are used to establish the whole three-dimensional FEM model and a simplified three-dimensional FEM model of a truncated cone and truncated pyramid. Comparison of the simulation results from the two models indicates that both models fit the simulation of SPIF but the simplified model is more efficient. Therefore, based on the simplified FEM model of a truncated pyramid, the SPIF process with different parameters was simulated to study the incremental forming principle. It was found that the deformed blank could be divided into three regions with different deformation patterns and the main character of the deformation could be conceded as a combination of bending and stretching.
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Dissertations / Theses on the topic "Truncated Cone Model"

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Utkutug, Deniz. "A Parametric Study Investigating The Inertial Soil-structure Interaction Effects On Global And Local Deformation Demands Of Multistory Steel Mrf Structures Resting On Surface Rigid Mat Foundations." Phd thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610490/index.pdf.

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In reality, dynamic response of a structure supported on a compliant soil may vary significantly from the response of same structure when supported on a rigid base. A parametric study is conducted for the analysis of the variation in the global and the local deformation demands caused by the inertial soil-structure interaction effects. For the purposes of the study, nonlinear dynamic analyses are performed on 7 steel moment-resisting frame models, which are prepared by the virtue of fixed-base and flexible-base (interacting) conditions. Foundation is modeled with the Truncated Cone Model (Wolf, 1994) with the frequency independent coefficients. Free-field earthquake acceleration records are selected to conform to NEHRP equivalent Site Classes C and D. The study is limited to the structures founded on surface rigid mat foundations subjected to vertically propagating horizontally polarized coherent shear waves. Statistical analysis based on multiple linear regression procedure is performed to represent the variation in the response. Within the scope of the study, the wave parameter and the aspect ratio are observed to be directly proportional to the variation in the response, as a general trend. Maximum beneficial contribution of the SSI is found to be 6% in both global and local deformation demands. In addition, the contribution of inertial interaction effects is found to be in a decreasing trend for the increasing levels of ductility demands. Finally, upper limits of wave parameter for H/R=0.5, 1, 2 and 3 are calculated where the variation in the demands are capped at 1.0.
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Spies, Helena [Verfasser], Robert [Akademischer Betreuer] Roth, and Jens [Akademischer Betreuer] Braun. "Importance-Truncated No-Core Shell Model for Fermionic Many-Body Systems / Helena Spies ; Robert Roth, Jens Braun." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2017. http://d-nb.info/1127729225/34.

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Anoop, K. P. "Truncated Data Problems In Helical Cone-Beam Tomography." Thesis, 2008. http://hdl.handle.net/2005/766.

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This report delves into two of the major truncated data problems in helical cone-beam tomography: Axial truncation and Lateral truncation. The problem of axial truncation, also classically known as the Long Object problem, was a major challenge in the development of helical scan tomography. Generalization of the Feldkamp method (FDK) for circular scan to the helical scan trajectory was known to give reasonable solutions to the problem. The FDK methods are approximate in nature and hence provide only approximate solution to the long object problem. Recently, many methods which provide exact solution to this problem have been developed the major breakthrough being the Katsevich’s algorithm which is exact, efficient and also requires lesser detector area compared to Feldkamp methods. The first part of the report deals with the implementation strategies for methods capable of handling axial truncation. Here, we specifically look at the exact and efficient Katsevich’s solution to long object problem and the class of approximate solutions provided by the generalized FDK formulae. The later half of the report looks at the lateral truncation problem and suggests new methods to handle such truncation in helical scan CT. Simulation results for reconstruction with laterally truncated projection data, assuming it to be complete, gives severe artifacts which even penetrates into the field of view (FOV). A row-by-row data completion approach using Linear Prediction is introduced for helical scan truncated data. An extension/improvement of this technique known as Windowed Linear Prediction approach is introduced. Efficacy of both these techniques are shown using simulation with standard phantoms. Various image quality measures for the resulting reconstructed images are used to evaluate the performance of the proposed methods against an already existing technique. Motivated by a study of the autocorrelation and partial autocorrelation functions of the projection data the use of a non-stationary linear model, the ARIMA model, is proposed for data completion. The new model is first validated in the 2D truncated data situation. Also a method of incorporating the parallel beam data consistency condition into this new method is considered. Performance evaluation of the new method with consistency condition shows that it can outperform the existing techniques. Simulation experiments show the efficacy of the ARIMA model for data completion in 2D as well as 3D truncated data scenario. The model is shown to work well for the laterally truncated helical cone-beam case.
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Spies, Helena. "Importance-Truncated No-Core Shell Model for Fermionic Many-Body Systems." Phd thesis, 2017. http://tuprints.ulb.tu-darmstadt.de/5973/1/diss_mit_danksagung_und_widmung.pdf.

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The exact solution of quantum mechanical many-body problems is only possible for few particles. Therefore, numerical methods were developed in the fields of quantum physics and quantum chemistry for larger particle numbers. Configuration Interaction (CI) methods or the No-Core Shell Model (NCSM) allow ab initio calculations for light and intermediate-mass nuclei, without resorting to phenomenology. An extension of the NCSM is the Importance-Truncated No-Core Shell Model, which uses an a priori selection of the most important basis states. The importance truncation was first developed and applied in quantum chemistry in the 1970s and latter successfully applied to models of light and intermediate mass nuclei. Other numerical methods for calculations for ultra-cold fermionic many-body systems are the Fixed-Node Diffusion Monte Carlo method (FN-DMC) and the stochastic variational approach with Correlated Gaussian basis functions (CG). There are also such method as the Coupled-Cluster method, Green’s Function Monte Carlo (GFMC) method, et cetera, used for calculation of many-body systems. In this thesis, we adopt the IT-NCSM for the calculation of ultra-cold Fermi gases at unitarity. Ultracold gases are dilute, strongly correlated systems, in which the average interparticle distance is much larger than the range of the interaction. Therefore, the detailed radial dependence of the potential is not resolved, and the potential can be replaced by an effective contact interaction. At low energy, s-wave scattering dominates and the interaction can be described by the s-wave scattering length. If the scattering length is small and negative, Cooper-pairs are formed in the Bardeen-Cooper-Schrieffer (BCS) regime. If the scattering length is small and positive, these Cooper-pairs become strongly bound molecules in a Bose-Einstein-Condensate (BEC). In between (for large scattering lengths) is the unitary limit with universal properties. Calculations of the energy spectra (ground-state and first excited-state) have so far only been performed for up to five particles using CI or NCSM methods or for up to six particles using the CG method. Calculations with larger particle numbers have only been performed with Monte Carlo methods and only for the ground state of up to 30 particles. We extend ab initio calculations of the energy spectra of ultra-cold Fermi gases at unitarity for up to 20 particle using the IT-NCSM. For our calculations we use different interactions: an effective interaction introduced by Alhassid, Bertsch and Fang and an interaction constructed using an effective field theory (EFT) approach. Furthermore, we use a Gauss-shaped potential as it is also used for the calculations of ultra-cold Fermi gases at unitarity using CG or FN-DMC methods. Although more effort must be invested to make the Gauss-shaped potential suitable for IT-NCSM calculations of ultra-cold Fermi gases, calculations with the other two interactions yield ground-state energies which agree excellently with the results obtained using the FN-DMC method. The IT-NCSM extends the range of the NCSM and permits the calculation of energy spectra (ground-state and excited-state energies) of fermionic systems with large particle numbers for which previously only the ground states could be calculated using Monte Carlo methods.
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"Data disaggregation with ecological inference: implementation of models based in the truncated normal and on the binomial-beta via em algorithm." Tese, MAXWELL, 2000. http://www.maxwell.lambda.ele.puc-rio.br/cgi-bin/db2www/PRG_0991.D2W/SHOW?Cont=1347:pt&Mat=&Sys=&Nr=&Fun=&CdLinPrg=pt.

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Book chapters on the topic "Truncated Cone Model"

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Karmanov, V. A. "Non-perturbative Renormalization in Truncated Yukawa Model." In Light Cone 2015. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50699-9_18.

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Huang, Guangqin, Yajiao Liu, Xiaofeng Yang, and Chunlong Zhuang. "Heat Transfer of Helix Energy Pile: Part 2—Novel Truncated Cone Helix Energy Pile." In Heat Transfer - Models, Methods and Applications. InTech, 2018. http://dx.doi.org/10.5772/intechopen.76821.

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Conference papers on the topic "Truncated Cone Model"

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Shen, Zejun, Peng Zuo, and Jiansheng Yuan. "Calculation of the shrinking contact resistance by truncated cone model to simulate the contact of armature and rails." In 2012 16th International Symposium on Electromagnetic Launch Technology (EML). IEEE, 2012. http://dx.doi.org/10.1109/eml.2012.6325121.

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Wang, Jiyuan, Longqiu Li, Xiaocong Chang, Tianlong Li, Wenping Song, and Guangyu Zhang. "The Effect of Geometry on the Velocity and Drag Force of Catalytic Micro/Nano-Rockets." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46881.

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The hydrodynamic behavior of synthetic self-propelled catalytic micro/nano-rocket moving in low Reynolds number flow is studied theoretically. The inclination angle of the bubble departed from the micro/nano-rocket is related to the radius of the micro/nano-rocket. A unified formula of the drag force for cylindrical, cone-frustum and double truncated cone shapes micro/nano-rocket have been derived. The effect of geometric shapes on the velocity and the drag force is identified by comparing with three circular cross-sectional types of micro/nano-rocket. The average velocity is found to be strongly dependent on semi-cone angle, length, radius of the micro/nano-rocket, the H2O2 concentration and the drag force. This model provides a proficient explanation for propulsion mechanism of a catalytic micro/nano-rocket. This work can be used to optimize catalytic micro/nano-rockets design, which may have potential applications in biomedical and environmental engineering.
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Wang, Yongjun, Weichao Wu, Ying Huang, N. Venkata Reddy, and Jian Cao. "Experimental and Numerical Analysis of Double Sided Incremental Forming." In ASME 2009 International Manufacturing Science and Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/msec2009-84275.

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This paper presents a new rapid prototyping process of a thin sheet metal, Double Sided Incremental Forming of a cylindrical part without a die or a clamping device around the periphery of the sheet. The effects of process parameters on part shape, such as gap between two tool heads and feed rate, are examined experimentally with a special device mounted on a general lathe and numerically with a commercial finite element software package, Abaqus. Depending on the process parameter, a truncated cone shape part can be successfully fabricated with two tool heads pressing and moving along the radial direction of the sheet, which is held by lathe spindle at its center. A simple mathematic model to predict the cone angle is proposed and compared well with experimental data.
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He, Kai, Jiuhua Li, Shuguo Wei, and Ruxu Du. "The Experimental Study on Forming Accuracy for Water Jet Incremental Sheet Metal Forming." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62892.

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This paper aimed to present the methods to improve the forming accuracy for water jet incremental sheet metal forming. The study focuses on the process parameters and the forming accuracy based on the experiments. Firstly, some experiments was carried out to evaluate the deformation effect of sheet metal in water jet incremental sheet metal forming process with respect to some key parameters, such as water jet pressure and feed velocity. Then, the influence of layer on deformation was analyzed, and the theoretical model of forming accuracy and two methods to improve the forming accuracy were presented. Finally, the circular truncated cone parts formed with different methods and the profiles were measured with a coordinate measuring machine. Compared with the designed model geometry, the experimental results showed that an achievable forming accuracy could be obtained by the presented two methods.
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Błachut, J. "Buckling of Truncated Cones With Localized Imperfections." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78374.

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The paper shows that both the inward and outward bulge-type axisymmetric shape imperfections can significantly lower the buckling strength of steel conical shells. The FE results are provided for: (i) axial compression, (ii) external pressure, and (iii) combined action of both loads. Sensitivity of buckling loads to outward bulges has not been generally known or expected. It is shown that the sensitivity of buckling load depends not only on the shape, amplitude but also on the position of the imperfection along the slant. Geometry of recently tested cones was also used in order to assess the influence of measured shape deviations on the buckling strength. The amplitudes of imperfections in these machined models were small (up to 5 % of wall thickness). As a result their influence on the buckling strength was found to be negligible.
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Friedlander, F., A. Karp, B. Gaiser, J. Gaiser, and B. Goplen. "Transient analysis of beam interaction with antisymmetric mode in truncated periodic structure using 3-dimensional computer code "SOS"." In 1985 International Electron Devices Meeting. IRE, 1985. http://dx.doi.org/10.1109/iedm.1985.190923.

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Liu, Yumin, Zhongyuan Yu, and Xiaomin Ren. "The Electronic Structure of Truncated-Conical Shaped InAs/GaAs Quantum Dot With Wetting Layers." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21539.

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Semiconductor quantum dots have been of major interest in recent years. This has largely been simulated by progress in quantum dot growth technology, whereby self-organized quantum dots array can be achieved using Stranski-Krastanow growth mode. Quantum does material has achieved broad applications in optoelectronic devices and quantum information fields because of the unique 3-D electron confinement. Based on the 1-band effective-mass theory, a finite element technique is developed to calculate the electronic structure of conical shaped InAs/GaAs quantum dot, including the wetting layer. Using the axis-symmetry model, the 3-D effective-mass Schro¨dinger equation with step potential barrier can be reduced to a 2-D problem by separating variable, which greatly reduced the calculation cost. Based on the result, we found, compared without wetting layer, the wetting layer can influence the electron level. This may attribute to the increase of the confining potential width rather than the potential height. The presented finite element code can be further used to analysis the transverse or vertical coupled quantum dot molecule.
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Markuš, Š., and T. Nánási. "Estimation of Response and Loss Factor of Damped Sandwich Beam." In ASME 1991 Design Technical Conferences. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/detc1991-0257.

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Abstract Classical governing equations of a three-layered sandwich beam are generalized with the aim to avoid the necessity of identical arrangement of both face layers at the end of the beam. In this way more shear deformations in the core are allowed for. This may significantly contribute to the increased dissipation of vibratory energy. Estimation of the response of the damped sandwich beam and the loss factor are based on truncated integral modal transformation in which the base functions are the modal data from the associated undamped system. Simple formula expressing the modal loss factor in terms of the portion of strain energy due to shear deformations in the core is developed. Presented approach is in fact a reinterpretation of the concept of damped normal modes in such a way that numerical computations are to be carried out only in the real domain while the previous formulation required numerical treatment in the complex domain.
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Blachut, J., and O. Ifayefunmi. "Plastic Buckling of Conical Shells." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79219.

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The buckling of unstiffened truncated conical shells subjected to axial compression and/or to external pressure is discussed. This work is both experimental and theoretical/numerical. Results of tests on four laboratory scale cones and the associated numerical estimations of buckling loads are provided. The models were machined from mild steel and they had integral top and bottom flanges in them. The bottom and top diameters of the cones were about 200 mm and 100 mm, respectively. Semi-vertex angle was about 27°, whilst the nominal wall thickness was 3mm. The numerical results are based on the finite element analyses.
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Blachut, J., and O. Ifayefunmi. "Buckling of Unstiffened Steel Cones Subjected to Axial Compression and External Pressure." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20518.

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The paper considers buckling of unstiffened truncated conical shells under simultaneously acting quasi-static axial compression and an independent external hydrostatic pressure. This is both numerical and experimental study. Domains of combined stability were obtained using the finite element method for a range of geometrical parameters. Cones are clamped at one end and free to move axially at the other end, where all the other degrees of freedom remain constrained. Shells are assumed to be from mild steel and the material is modeled as elastic perfectly plastic. The FE results indicate that the static stability domains remain convex. The failure mechanisms, i.e., asymmetric bifurcation and axisymmetric collapse are discussed together with the spread of plastic strains through the wall thickness. Also, the combined stability domains are examined for regions of purely elastic behavior and for regions where plastic straining exists. The latter is not convex and repercussions of that are discussed. The spread of the latter is computed for a range of the (radius-to-wall-thickness)-ratios. Experimental results are based on laboratory scale models. Here, a single geometry was chosen for validation of numerically predicted static stability domain. Parameters of this geometry were assumed as follows: the ratio of bigger radius, r2, to smaller radius, r1, was taken as (r2/r1) = 2.02; the ratio of radius-to-wall-thickness, (r2/t), was 33.0, and the cone semi-angle was 26.56°, whilst the axial length-to-radius ratio was, (h/r2) = 1.01. Shells were CNC-machined from 252mm diameter solid steel billet. They had heavy integral flanges at both ends and models were not stress relieved prior to testing. Details about the test arrangements are provided in the paper. In particular, the development details and experience of the test rig for independent/combined loading of cones are given. The current contribution complements Ref. [1].
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