Готові списки джерел за темами / Conical shells

Добірка наукової літератури з теми "Conical shells"

Автор: Grafiati
Опубліковано: 27 липня 2024
Оновлено: 29 липня 2024

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

Оберіть тип джерела:

Зміст

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Conical shells".

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

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

Статті в журналах з теми "Conical shells"

1

Hien, Vu Quoc, Tran Ich Thinh, Nguyen Manh Cuong, and Pham Ngoc Thanh. "FREE VIBRATION ANALYSIS OF JOINED COMPOSITE CONICAL-CONICAL-CONICAL SHELLS CONTAINING FLUID." Vietnam Journal of Science and Technology 54, no. 5 (October 19, 2016): 650. http://dx.doi.org/10.15625/0866-708x/54/5/7684.

Повний текст джерела
Анотація:
ABSTRACT A new continuous element (CE) formulation has been presented in this paper for the vibration analysis of three joined cross-ply composite conical shells containing fluid. The three joined cross-ply composite conical shells containing fluid can be considered as the general case for joined conical-cylindrical-conical, joined cylindrical-conical-cylindrical, joined cylindrical-conical-conical and joined conical-conical-cylindrical shells containing fluid. Governing equations are obtained using thick shell theory of Midlin, taking into account the shear deflection effects. The velocity potential, Bernoulli’s equation and impermeability condition have been applied to the shell-fluid interface to obtain an explicit expression for fuild pressure. The dynamic stiffness matrix has been built from which natural frequencies have been calculated. The appropriate expressions among stress resultants and deformations are extracted as continuity conditions at the joining section. A matlab program is written using the CE formulation in order to validate our model. Numerical results on natural frequencies are compared to those obtained by the finite element method (FEM) and validated with the available results in other investigations. This paper emphasizes advantages of CE model and the effects of the fluid level, semi-vertex angles and lamination sequences on the natural frequencies of joined composite conical-conical-conical shells.
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Y, Meish, and Meish V. "POSTULATION AND BUILDING OF A NUMERICAL ALGORITHM FOR SOLVING THE PROBLEMS OF THE DYNAMICS OF THE THEORY OF CONICAL SHELLS IN NONORTHOGONAL COORDINATE SYSTEM." National Transport University Bulletin 1, no. 46 (2020): 211–17. http://dx.doi.org/10.33744/2308-6645-2020-1-46-211-217.

Повний текст джерела
Анотація:
The paper presents the formulation and numerical algorithm for solving problems of the dynamics of the theory of conical shells in a non-orthogonal coordinate system. The object of the study are conical shells, the equations of which are represented in non-orthogonal coordinate system. Purpose of the work is to formulate and construct a numerical algorithm for solving the problems of the dynamics of conical shells in a non-orthogonal coordinate system. The methods of research include the basic principles of the theory of shells to Tymoshenko's type and numerical methods. The formulation of problems and a numerical algorithm for studying the dynamic behavior of conical shells in a non-orthogonal coordinate system are considered. The results obtained in the work can be used in the design of elements of shell structures in the rocket, aircraft and shipbuilding industries. KEYWORDS: CONIC SHELL, DYNAMIC PROCESSES, NON-ORTHOGONAL COORDINATE SYSTEM, NUMERICAL METHODS
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Vinh, Le Quang, and Nguyen Manh Cuong. "Dynamic analysis of FG stepped truncated conical shells surrounded by Pasternak elastic foundations." Vietnam Journal of Mechanics 42, no. 2 (June 29, 2020): 133–52. http://dx.doi.org/10.15625/0866-7136/14749.

Повний текст джерела
Анотація:
This research presents a continuous element model for solving vibration problems of FG stepped truncated conical shells having various material properties and surrounded by Pasternak foundations. Based on the First Order Shear Deformation Theory (FSDT) and the equations of the FGM conical shells, the dynamic stiffness matrix is obtained for each segment of the shell having constant thickness. The interesting assembly procedure of continuous element method (CEM) is employed for joining those segments in order to analyze the dynamic behavior of the FG stepped truncated conical shells an assembly procedure of continuous element method (CEM) is employed for joining those segments. Free vibrations of different configurations of FG stepped truncated conical shells on elastic foundations are examined. Effects of structural parameters, stepped thickness and elastic foundations on the free vibration of FG stepped truncated conical shells are also presented.
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Pang, Fuzhen, Chuang Wu, Hongbao Song, and Haichao Li. "The free vibration characteristics of isotropic coupled conical-cylindrical shells based on the precise integration transfer matrix method." Curved and Layered Structures 4, no. 1 (November 27, 2017): 272–87. http://dx.doi.org/10.1515/cls-2017-0018.

Повний текст джерела
Анотація:
Abstract Based on the transfer matrix theory and precise integration method, the precise integration transfer matrix method (PITMM) is implemented to investigate the free vibration characteristics of isotropic coupled conicalcylindrical shells. The influence on the boundary conditions, the shell thickness and the semi-vertex conical angle on the vibration characteristics are discussed. Based on the Flügge thin shell theory and the transfer matrix method, the field transfer matrix of cylindrical and conical shells is obtained. Taking continuity conditions at the junction of the coupled conical-cylindrical shell into consideration, the field transfer matrix of the coupled shell is constructed. According to the boundary conditions at the ends of the coupled shell, the natural frequencies of the coupled shell are solved by the precise integration method. An approach for studying the free vibration characteristics of isotropic coupled conical-cylindrical shells is obtained. Comparison of the natural frequencies obtained using the present method with those from literature confirms the validity of the proposed approach. The effects of the boundary conditions, the shell thickness and the semivertex conical angle on vibration characteristics are presented.
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Zannon, Mohammad, and Hussam Alrabaiah. "Mathematical Formulation of Laminated Composite Thick Conical Shells." Journal of Mathematics Research 8, no. 4 (July 25, 2016): 166. http://dx.doi.org/10.5539/jmr.v8n4p166.

Повний текст джерела
Анотація:
<span lang="EN-US">The </span><span lang="EN-US">mathematical formulation</span><span lang="EN-US">of thick conical shells using third order shear deformation of thick shell theory are presented. The equations of motion are obtained using Hamilton’s principle. For present analysis, we consider shell's system transverse normal stress, rotary inertia and shear deformation.</span>
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Kamaloo, Abbas, Mohsen Jabbari, Mehdi Yarmohammad Tooski, and Mehrdad Javadi. "Nonlinear Free Vibrations Analysis of Delaminated Composite Conical Shells." International Journal of Structural Stability and Dynamics 20, no. 01 (November 29, 2019): 2050010. http://dx.doi.org/10.1142/s0219455420500108.

Повний текст джерела
Анотація:
This paper examines the nonlinear free vibration of laminated composite conical shells throughout the circumferential delamination. First, based on the energy method, the governing equation of motion for the shell was derived. To simplify the analysis, the nonlinear partial differential equations were reduced into a system of coupled ordinary differential equations using Galerkin’s method. Consequently, the results were obtained by the numerical methods. Finally, the effects of delamination, variations in the delamination length, conical shells characteristics, materials property and circumferential wave number on the nonlinear response of delaminated composite conical shells were examined. The results show that the presence of delamination leads to increase in the amplitude of oscillations for the shells. Besides, the increase in the delamination length and decrease of the circumferential wave number, number of layers, and half vertex angle of the cone and orthotropy bring about a decrease in the nonlinearity of delaminated composite conical shells. However, an increase of the middle surface radius of the shell leads to a reduction of the nonlinearity as well as an increase of the amplitude.
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Khadem, Siamak E., and Reza Nezamoleslami. "Investigation of the Free Vibrations of Composite Anisogrid Lattice Conical Shells Formed by Geodesically Spiral and Circumferential Ribs." International Journal of Applied Mechanics 09, no. 04 (May 16, 2017): 1750047. http://dx.doi.org/10.1142/s1758825117500478.

Повний текст джерела
Анотація:
This paper focuses on the dynamic behavior of composite anisogrid lattice conical shells. Lattice composite conical shell consists of composite helical and circumferential ribs and thin outer skin. The free vibration analysis of anisogrid composite lattice conical shell is presented. A smeared method is employed to calculate the variable coefficients of stiffness of conical shell and more close to the realistic applications. The lattice part of conical shell is modeled as a beam, so in addition to the axial loads, ribs endure shear loads and bending moments. The first-order shear deformation shell theory is used to account for the effects of transverse shear deformations and rotary inertia. The current results are verified with 3D finite element model of conical shell by ANSYS Software and those reported in the literature. Some special cases as influences of geometric parameters of lattice part of shell, effects of boundary conditions and circumferential wave number on natural frequencies of the shell are discussed. It was concluded that employment of the smear method could be recommended for determining the coefficients of stiffness of the composite lattice conical shells with outer skin. Also increasing the vertex angle of cone increases the natural frequencies of conical shell.
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Alcaraz, Guillermina, Brenda Toledo, and Luis M. Burciaga. "The energetic costs of living in the surf and impacts on zonation of shells occupied by hermit crabs." Journal of Experimental Biology 223, no. 16 (July 9, 2020): jeb222703. http://dx.doi.org/10.1242/jeb.222703.

Повний текст джерела
Анотація:
ABSTRACTCrashing waves create a hydrodynamic gradient in which the most challenging effects occur at the wave breaking zone and decrease towards the upper protected tide pools. Hydrodynamic forces depend on the shape of the submerged body; streamlined shapes decrease drag forces compared with bluff or globose bodies. Unlike other animals, hermit crabs can choose their shell shape to cope with the effects of water flow. Hermit crabs occupy larger and heavier shells (conical shape) in wave-exposed sites than those used in protected areas (globose shape). First, we investigated whether a behavioral choice could explain the shells used in sites with different wave action. Then, we experimentally tested whether the shells most frequently used in sites with different wave action reduce the energetic cost of coping with water flow. Metabolic rate was measured using a respirometric system fitted with propellers in opposite walls to generate bidirectional water flow. The choice of shell size when a large array of sizes are available was consistent with the shell size used in different intertidal sites; hermit crabs chose heavier conical shells in water flow conditions than in still water, and the use of heavy conical shells reduced the energetic cost of coping with water motion. In contrast to conical shells, small globose shells imposed lower energy costs of withstanding water flow than large globose shells. The size and type of shells used in different zones of the rocky shore were consistent with an adaptive response to reduce the energetic costs of withstanding wave action.
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Yan, Yi Xia, Wei Fang Xu, Xi Cheng Huang, Gang Chen, and Zhi Ming Hao. "Numerical Simulation on Drop Test of the Conical Shell." Applied Mechanics and Materials 44-47 (December 2010): 2341–45. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2341.

Повний текст джерела
Анотація:
The drop test for the thin 2A12 conical shells was developed on a drop hammer. The dynamical responses, typical deformation histories and failure mode of the shells were presented. The drop impact response of the thin conical shells were numerically simulated and analyzed in detail by using the explicit, nonlinear transient dynamic code, LS-DYNA. In the calculation, the material plastic behavior of the conical shells was described by Johnson-Cook constitutive relationship, which includes the effects of the strain rate, strains harden and temperatures soften. The deformation and failure model of the conical shell obtained from the numerical simulation were consistent well with the experiment. It was shown that the calculation method, material model and the failure criterion were available. The test and numerical simulation results were all shown that the failure mode was different because of the different drop height.
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Hagihara, Seiya, and Noriyuki Miyazaki. "Bifurcation Buckling Analysis of Conical Roof Shell Subjected to Dynamic Internal Pressure by the Finite Element Method." Journal of Pressure Vessel Technology 125, no. 1 (January 31, 2003): 78–84. http://dx.doi.org/10.1115/1.1533801.

Повний текст джерела
Анотація:
Cylindrical tanks with conical roof shells are utilized as oil storage tanks and for some containment vessels. It is known that conical roof shells and torispherical shells subjected to static internal pressure buckle into a displaced shape with circumferential waves caused by an instability condition commonly called bifurcation buckling. It can be important to obtain the dynamic bifurcation buckling load in designing conical roof shells. In this paper, the bifurcation buckling pressure is calculated for dynamic pressure during accident conditions as characterized by step pressure loading, ramp pressure loading and pulse pressure loading. The minimum bifurcation buckling pressure is shown to be a linear function of radius-to-thickness ratio R/h of the shell in a linear fashion on a logarithmic scale. The minimum bifurcation buckling pressure is minimum for conical roof shells subjected to the step loading. The minimum dynamic bifurcation buckling pressure for step loading is about half of the static bifurcation buckling pressure.
Стилі APA, Harvard, Vancouver, ISO та ін.
Більше джерел

Дисертації з теми "Conical shells"

1

Sadr-Hashemi, Farshid. "Buckling of conical shells." Thesis, University College London (University of London), 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.685403.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Ifayefunmi, Olawale Friday. "Combined stability of conical shells." Thesis, University of Liverpool, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.569897.

Повний текст джерела
Анотація:
This thesis is concerned with the study of the elastic-plastic buckling of short and relatively thick conical shells subjected to combined loading, i.e., axial compression and external pressure acting simultaneously. This is both numerical and experimental study. Within the context of numerical study, a nonlinear finite element calculations were carried out in order to obtain: (i) the failure loads of cones under axial compression only, external pressure only and under combined loading, (ii) the spread of plastic strain and the effect of strain hardening of the material on failure loads, and (iii) the sensitivity of buckling loads to initial geometric imperfections or to structural defects under various loading conditions. The thesis provides results of extensive FE calculations. An experimental programme involved tests on thirteen conical specimens CNC machined with integral top and bottom flanges from 252mm diameter steel billet. The specimens were made from mild steel material with average yield stress of 230.6 MPa, Young's modulus of 21 0490 MPa and Poisson' s ratio of 0.28l. Prior to tests, the existing test rig had to be significantly modified and instrumented in order to accommodate independent/combined loadings. The test procedure has been developed and successfully implemented. Two models were subjected to axial compression, with further two subjected to external pressure. The remaining nine cones were subjected to combined action of axial compression and external pressure. Experimental results were compared with predictions of failure loads obtained from the existing design codes. For the case of axial compression an extension of the design rules is outlined in order to widen the range of applicability. For the case of external pressure, the test data compared well with the theoretical work by Esslinger and Van Impe, [40]. At the same time the test data highlighted how inadequate estimates of the load carrying capacity are given by the design codes. The case of combined loading, i.e., axial compression and external pressure is only covered by ASME code case 2286-2, [157], and experimental data does not exist. The current study provides the first and much needed test data. The thesis also looks into the concept of equivalent cylinder. Numerical results point out to the fact that this approach is unsuitable for combined stability scenario (axial compression and external pressure). Experimental data is also compared with predictions given by the Finite Element calculations. Details about various approaches to modeling material properties, shape, wall thickness distribution, and boundary conditions are discussed. The quality of FE models is assessed by comparing the FE predictions of the load carrying capacity with the test data.
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Caresta, Mauro Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "Structural and acoustic responses of a submerged vessel." Publisher:University of New South Wales. Mechanical & Manufacturing Engineering, 2009. http://handle.unsw.edu.au/1959.4/44404.

Повний текст джерела
Анотація:
Excitation of the low frequency vibrational modes of a submerged vessel can generate significant radiated noise levels. Vibrational modes of a submarine hull are excited from the transmission of fluctuating forces through the shaft and thrust bearings due to the propeller rotating in an unsteady fluid. The focus of this work is to investigate the structural and acoustic responses of a submarine hull under axial excitation. The submarine hull is modelled as a cylindrical shell with internal bulkheads and ring stiffeners. The cylindrical shell is closed by truncated conical shells, which in turn are closed at each end using circular plates. The entire structure is submerged in a heavy fluid medium. The structural responses of the submerged vessel are calculated by solving the cylindrical shell equations of motion using a wave approach and the conical shell equations with a power series solution. The displacement normal to the surface of the structure in contact with the fluid medium was calculated by assembling the boundary/continuity matrix. The far field radiated sound pressure was then calculated by means of the Helmholtz integral. Results from the analytical model are compared with computational results from a fully coupled finite element/boundary element model. The individual and combined effects of the various influencing factors, corresponding to the ring stiffeners, bulkheads, conical end closures and fluid loading, on the structural and acoustic responses are characterised by examining the contribution by the circumferential modes. It is shown that equally spaced internal bulkheads generate a periodic structure thus creating a grouping effect for the higher circumferential modes, but do not have strong influence on the sound radiation. Stiffeners are found to have an important effect on both the dynamic and acoustic responses of the hull. The contribution of the conical end closures on the radiated sound pressure for the lowest circumferential mode numbers is also clearly observed. This work shows the importance of the bending modes when evaluating the sound pressure radiated by a submarine under harmonic excitation from the propulsion system.
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Spagnoli, Andrea. "Buckling behaviour and design of stiffened conical shells under axial compression." Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/8821.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Steyn, Brett Kenneth. "The effect of weld-induced imperfections on the buckling behaviour of spherical and conical shells." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/4999.

Повний текст джерела
Анотація:
Includes bibliographical references.
The early research was on general imperfections most commonly in the form of the lowest buckling modes. The use of steel pates to fabricate silos in a regular pattern led to the civil engineering interest in the weld-induced imperfection. This imperfection was found to be in the circumferential direction and the dominant cause for the reduction of the classical buckling load. As previous research was conducted on cylindrical shells the current thesis focused on studying two different shell geometries.
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Low, Hwee Min Charles. "Computation of acoustic scattering from elastic conical shells with endcaps using the hybrid finite element/ virtual source approach." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/33421.

Повний текст джерела
Анотація:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2004.
Includes bibliographical references (p. 101-102).
Studying and understanding acoustic scattering pattern from underwater targets has been of interest to various communities such as the archeologists and the navy for several reasons and applications. The present state-of-the-art technique in this area involves such methods as analytical approach and FEM/BEM numerical technique. This thesis aims to study and demonstrate the power of using the hybrid virtual source/FE approach where the physical presence of a target is replaced by virtual sources placed in the vicinity of the target and in a manner where the pressure/displacement relationship on the target surface is satisfied by the virtual sources when the target is being insonified. Accurate results for the far-field radiation of the target can be obtained by superposition of the point source Green's function of each virtual source. The hybrid virtual source/FE approach shows potential to be a computationally efficient method for computing acoustic scattering. The derivation of the dynamic flexibility matrix for an elastic conical shell with endcaps will be illustrated in this thesis. It will be shown that the dynamic flexibility matrix corresponds to the acoustic admittance matrix in the virtual source approach where the scattering functions are computed in the MIT's program OASES/SCATT.
(cont.) Moreover, the benchmarking and validation of the approach will be conducted with the hybrid analytical/ virtual source approach. Firstly, the approach predicts natural frequencies close to the theoretical analysis for higher order modes with more than 2 circumferential transverse vibration lobes. Secondly, it produces displacement profile that conforms to analytical results. The scattering functions are also in agreement those computed by the hybrid analytical/ virtual source approach, with discrepancies observed at lower frequencies. In exact terms, discrepancies start to appear for frequency in the range of 1000 to 2000 Hz for a 0.01m thick, 2 m long, 0.3m radius steel cylinder without endcaps. The scattering functions will be compared with the SCATT/OASES virtual source approach for pressure release and rigid cylinders and cones. For the hybrid FE/virtual source approach, the structural sound speed and density approach zero and infinity for pressure-release and rigid target respectively. On the other hand, in the SCATT/OASES virtual source approach, the pressure and displacement are required to vanish on the target surface respectively. It will be shown that the two approaches agree with each other.
(cont.) Moreover, scattering functions over steel cones and cylinders for various frequencies have also been derived in this research. The results will be interpreted physically and theoretically in this thesis. The importance of including structural damping in the finite element formulation of the target so as to reflect the effect of resonance on scattering will be illustrated. Other issues, such as effect of target orientations on scattering, will also be investigated in this thesis. The code has shown good potential for adaptation to compute scattering over other axisymmteric shapes using conical shells and circular plates as building blocks and the hybrid FE/ virtual source approach.
by Hwee Min Charles Low.
S.M.
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Rossetti, Luigi <1978&gt. "Static analysis of functionally graded cylindrical and conical shells or panels using the generalized unconstrained third order theory coupled with the stress recovery." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5749/1/Rossetti_Luigi_tesi.pdf.

Повний текст джерела
Анотація:
A 2D Unconstrained Third Order Shear Deformation Theory (UTSDT) is presented for the evaluation of tangential and normal stresses in moderately thick functionally graded conical and cylindrical shells subjected to mechanical loadings. Several types of graded materials are investigated. The functionally graded material consists of ceramic and metallic constituents. A four parameter power law function is used. The UTSDT allows the presence of a finite transverse shear stress at the top and bottom surfaces of the graded shell. In addition, the initial curvature effect included in the formulation leads to the generalization of the present theory (GUTSDT). The Generalized Differential Quadrature (GDQ) method is used to discretize the derivatives in the governing equations, the external boundary conditions and the compatibility conditions. Transverse and normal stresses are also calculated by integrating the three dimensional equations of equilibrium in the thickness direction. In this way, the six components of the stress tensor at a point of the conical or cylindrical shell or panel can be given. The initial curvature effect and the role of the power law functions are shown for a wide range of functionally conical and cylindrical shells under various loading and boundary conditions. Finally, numerical examples of the available literature are worked out.
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Rossetti, Luigi <1978&gt. "Static analysis of functionally graded cylindrical and conical shells or panels using the generalized unconstrained third order theory coupled with the stress recovery." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5749/.

Повний текст джерела
Анотація:
A 2D Unconstrained Third Order Shear Deformation Theory (UTSDT) is presented for the evaluation of tangential and normal stresses in moderately thick functionally graded conical and cylindrical shells subjected to mechanical loadings. Several types of graded materials are investigated. The functionally graded material consists of ceramic and metallic constituents. A four parameter power law function is used. The UTSDT allows the presence of a finite transverse shear stress at the top and bottom surfaces of the graded shell. In addition, the initial curvature effect included in the formulation leads to the generalization of the present theory (GUTSDT). The Generalized Differential Quadrature (GDQ) method is used to discretize the derivatives in the governing equations, the external boundary conditions and the compatibility conditions. Transverse and normal stresses are also calculated by integrating the three dimensional equations of equilibrium in the thickness direction. In this way, the six components of the stress tensor at a point of the conical or cylindrical shell or panel can be given. The initial curvature effect and the role of the power law functions are shown for a wide range of functionally conical and cylindrical shells under various loading and boundary conditions. Finally, numerical examples of the available literature are worked out.
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Castro, Paullo Giovani Pereira [Verfasser]. "Semi-analytical tools for the analysis of laminated composite cylindrical and conical imperfect shells under various loading and boundary conditions / Paullo Giovani Pereira Castro." Clausthal-Zellerfeld : Universitätsbibliothek Clausthal, 2015. http://d-nb.info/1066715157/34.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Dapic, Ignacio. "Numerical Model for the Lateral Compression Response of a Plastic Cup." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/34750.

Повний текст джерела
Анотація:
A numerical analysis based on the finite element method is developed to simulate the mechanical response of a typical sixteen-ounce plastic drink cup subjected to a lateral compressive load. The aim of the analysis is to simulate a test in which the cup is supported horizontally in a fixture on a testing machine platen, and a loading nose attached to the actuator is displaced downward into the cup. The numerical model is developed using the software packages MSC.Patran, ABAQUS/CAE, and ABAQUS/Standard. The high impact polystyrene material of the cup is modeled as linear elastic, considering isotropic and orthotropic material behavior. The structural model of the cup is a truncated conical shell including a ring at the open end of the cup and circumferential stiffening ribs. The analysis is based on small strain, large rotation shell kinematics, and the loading apparatus of the test is simulated with a rigid, circular cylinder contacting the cup. Coupons cut from the wall of a cup are subjected to tension to determine the ranges of the meridional and circumferential moduli of elasticity. Rings cut from the open end of the cup were tested in diametrical tension to aid in validating the finite element modeling. Reasonable correlation of the simulation to available cup compression test data is achieved. Parametric studies are conducted for several meridional thickness distributions of the cup wall, and for a range of orthotropic material properties.
Master of Science
Стилі APA, Harvard, Vancouver, ISO та ін.
Більше джерел

Книги з теми "Conical shells"

1

Zhang, Guo-qi. Stability analysis of anisotropic conical shells. Delft: Delft University Press, 1993.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Petsios, Mikhalis. Buckling of thin truncated conical shells (Frusta) under quasi-static and dynamic axial load. Manchester: UMIST, 1993.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Seeto, Johnson. An update on the living and fossil Cone Shells (Gastropoda : Conidae) of Fiji. Suva, Fiji: The University of the South Pacific, 1998.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Chang, Chin Hao. Mechanics of Elastic Structures with Inclined Members: Analysis of Vibration, Buckling and Bending of X-Braced Frames and Conical Shells. Springer, 2010.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Mechanics of Elastic Structures with Inclined Members: Analysis of Vibration, Buckling and Bending of X-Braced Frames and Conical Shells (Lecture Notes in Applied and Computational Mechanics). Springer, 2005.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Karp, Samuel N., and Ellis J. Rich. Virtual Mass of a Finite Conical Shell. Creative Media Partners, LLC, 2018.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.

Частини книг з теми "Conical shells"

1

Jin, Guoyong, Tiangui Ye, and Zhu Su. "Conical Shells." In Structural Vibration, 199–233. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-46364-2_6.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Vinson, Jack R. "Conical Shells." In The Behavior of Shells Composed of Isotropic and Composite Materials, 101–27. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-8141-7_5.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Vinson, Jack R. "Composite Conical Shells." In The Behavior of Shells Composed of Isotropic and Composite Materials, 358–76. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-8141-7_16.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Eslami, M. Reza. "Buckling of Conical Shells." In Buckling and Postbuckling of Beams, Plates, and Shells, 539–88. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62368-9_8.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Farkas, József, and Károly Jármai. "Cylindrical and Conical Shells." In Optimum Design of Steel Structures, 211–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36868-4_8.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Gerstle, Kurt H., Richard Lance, and E. T. Onat. "Plastic Behavior of Conical Shells." In Developments in Theoretical and Applied Mechanics, 398–409. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-5696-5_27.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Nagendranath, A., Sanjay A. Khalane, R. K. Gupta, and C. Lakshmana Rao. "Delamination Buckling of Composite Conical Shells." In Recent Advances in Applied Mechanics, 653–62. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9539-1_48.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Precup, Radu. "Compression–Expansion Critical Point Theorems in Conical Shells." In Nonlinear Analysis and Variational Problems, 135–45. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-1-4419-0158-3_12.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Torabi, Jalal, and Mohammad Reza Eslami. "Linear Thermal Buckling of Truncated FGM Conical Shells." In Encyclopedia of Thermal Stresses, 2772–78. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_494.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Vinson, Jack R., and Howard S. Kliger. "On the Behavior of Conical Shells Composed of Quasi-isotropic Composite Shells." In Composite Structures 4, 275–93. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3455-9_21.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "Conical shells"

1

Tzou, H. S., W. K. Chai, and D. W. Wang. "Modal Voltages and Distributed Signal Analysis of Conical Shells of Revolution." 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-21544.

Повний текст джерела
Анотація:
Abstract Conical shells and components are widely used as nozzles, injectors, rocket fairings, turbine blades, etc. Dynamic and vibration characteristics of conical shells have been investigated over the years. In this paper, electromechanics and distributed sensing phenomena of a generic double-curvature shell and a conical shell are discussed, and governing sensing signal-displacement equations are derived. Spatially distributed modal voltages and signal generations of conical shells laminated with distributed piezoelectric sensor layers or neurons are investigated based on the Donnel-Mushtari-Valsov theory. Distributed modal voltages and their various signal components of conical shell models reveal that the dominating signal component among the four contributing signal components is the circumferential membrane component. This dominance is even more significant for lower shell modes and/or deep shells. In general, high strain regions result in high signal magnitudes. Accordingly, the spatially distributed signal patterns — the modal voltages — clearly represent the modal dynamic and strain characteristics of conical shells.
Стилі APA, Harvard, Vancouver, ISO та ін.
2

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.

Повний текст джерела
Анотація:
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.
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Tzou, H. S., D. W. Wang, and W. K. Chai. "Control of Conical Shells Laminated With Full and Diagonal Actuators." 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/cie-21272.

Повний текст джерела
Анотація:
Abstract Nozzles, rocket fairings and many engineering structures/components are often made of conical shells. This report focuses on the finite element modeling, analysis, and control of conical shells laminated with distributed actuators. Electromechanical constitutive equations and governing equations of a generic piezo(electric)elastic continuum are defined first, followed by strain-displacement relations and electric field-potential relations of laminated shell composites. Finite element formulation of a piezoelastic shell element with non-constant Lamé parameters is briefly reviewed; element and system matrix equations of the piezoelastic shell sensor/actuator/structure laminate are derived. The system equation reveals the coupling of mechanical and electric fields, in which the electric force vector is often used in distributed control of shells. Finite element eigenvalue solutions of conical shells are compared with published numerical results first. Distributed control of the conical shell laminated with piezoelectric shell actuators is investigated and control effects of three actuator configurations are evaluated.
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Li, H., S. D. Hu, and H. S. Tzou. "Energy Harvesting Characteristics of Conical Shells." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48143.

Повний текст джерела
Анотація:
Piezoelectric energy harvesting has experienced significant growth over the past few years. Various harvesting structures have been proposed to convert ambient vibration energies to electrical energy. However, these harvester’s base structures are mostly beams and some plates. Shells have great potential to harvest more energy. This study aims to evaluate a piezoelectric coupled conical shell based energy harvester system. Piezoelectric patches are laminated on the conical shell surface to convert vibration energy to electric energy. An open-circuit output voltage of the conical energy harvester is derived based on the thin-shell theory and the Donnel-Mushtari-Valsov theory. The open-circuit voltage and its derived energy consists of four components respectively resulting from the meridional and circular membrane strains, as well as the meridional and circular bending strains. Reducing the surface of the harvester to infinite small gives the spatial energy distribution on the shell surface. Then, the distributed modal energy harvesting characteristics of the proposed PVDF/conical shell harvester are evaluated in case studies. The results show that, for each mode with unit modal amplitude, the distribution depends on the mode shape, harvester location, and geometric parameters. The regions with high strain outputs yield higher modal energies. Accordingly, optimal locations for the PVDF harvester can be defined. Also, when modal amplitudes are specified, the overall energy of the conical shell harvester can be calculated.
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Liepins, Atis A., and Javier Arnez. "Lateral Influence Coefficients for a Thin Conical Shell Frustum." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45298.

Повний текст джерела
Анотація:
Thin conical shell components are often used in vertical process vessels, bins, and water storage tanks. When exposed to the elements, such structures may be subjected to lateral wind forces and seismic accelerations. For calculations of lateral response of such structures with simplified models, in the form of vertical beams, lateral influence coefficients for thin conical frustum shells are useful. To compute lateral influence coefficient for conical frusta, asymmetric solutions of shell equations for cones are needed. The literature on asymmetric solutions for conical shells is sparse. Hoff [1] derived equations suitable over a limited range of parameters for asymmetric response of conical shells and indicated possible solutions using Fourier and power series. In his discussion of Hoff’s work, Pohle [2] indicated that an asymptotic solution of the equations is useless because of its validity over an impractical range of parameters. Seide [3] derived equations that removed the limitations of Hoff’s equations. Wilson [4] proposed solutions by separation of variables and power series. The slowly converging power series were summed using a computer for a conical panel under distributed loading. Chandrashekhar and Karekar solved the equations for a conical frustum under wind loading by expanding the solution in Fourier series in the circumferential direction, and applying finite differences in the meridional direction. The difference equations were solved using a computer. Derived here are closed-form expressions for thin conical shell frusta based on the membrane theory of shells. These influence coefficients are compared with finite element results for a conical shell, with specific geometry and material properties, for which wall bending is included.
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Chai, W. K., P. Smithmaitrie, and H. S. Tzou. "Micro-Signals and Modal Potentials of Nonlinear Deep and Shallow Conical Shells." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33940.

Повний текст джерела
Анотація:
Conventional sensors, such as proximeters and accelerometers, are add-on devices usually adding additional weights to structures and machines. Health monitoring of flexible structures by electroactive smart materials has been investigated over the years. Thin-film piezoelectric material, e.g., polyvinylidene fluoride (PVDF) polymeric material, is a lightweight and dynamic sensitive material appearing to be a perfect candidate in monitoring structure’s dynamic state and health status of flexible shell structures with complex geometries. The complexity of shell structures has thwarted the progress in studying the distributed sensing of shell structures. Linear distributed sensing of various structures have been studied, like beam, plate, cylindrical shell, conical shell, spherical shell, paraboloidal shell and toroidal shell. However, distributed sensing control of nonlinear shell structures has not been carried out rigorously. This study is to present the microscopic signals, modal voltages and distributed micro-sensing components of truncated nonlinear conical shells laminated with distributed infinitesimal piezoelectric neurons. Signal generation of distributed neuron sensors laminated on conical shells is defined first. The dynamic signal of truncated nonlinear conical shell consists of microscopic linear and nonlinear membrane strain components and linear bending strain component based on the von Karman geometric nonlinearity. Micro-signals, modal voltages and distributed sensing components of two different truncated nonlinear conical shells are investigated and their sensitivities discussed.
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Adibi-Asl, R. "Plastic Instability Pressure of Conical Shells." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57888.

Повний текст джерела
Анотація:
There several failure modes that are considered in the available codes and standards in field of pressure vessel and piping. One of these failure modes is plastic instability. This failure mode is defined as the pressure for which the components/structures approach dimensional instability (large deformation), i.e. unbounded displacement for a small increment in the applied load. In order to find this pressure both large deformation and strain hardening curve are considered. When the slope of numerically generated load-deformation curve approaching zero the corresponding applied load is considered as plastic instability load. Unlike cylindrical and spherical pressure vessels, available theoretical solution in range of plastic instability load for conical shells are very limited. Hence, it would be very useful to predict the behavior of these components with acceptable accuracy for design purposes. Analytical expressions are derived to determined plastic instability load of s conical shell subjected to internal pressure and when it is subjected to hydrostatic pressure (i.e., storage tanks). The geometrical changes can be estimated using the proposed solutions when considering the material strain hardening curve.
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Tzou, H. S. "Distributed Piezoelectric Neurons and Muscles for Shell Continua." In ASME 1991 Design Technical Conferences. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/detc1991-0178.

Повний текст джерела
Анотація:
Abstract Conventional shell continua are passive, which do not possess any sensation and action/reaction capabilities. In this paper, distributed piezoelectric layers coupled with conventional elastic shell distributed systems are used as distributed “neurons” (sensors) and “muscles” (actuators) for structural monitoring and actuation of shells. New theories on distributed “neural” sensation and actuation of shells are developed based on a generic shell continuum coupled with piezoelectric neurons and muscles. Open and closed loop system dynamic equations are also derived. The system equations are further transferred to state equations. The derived theories can be directly simplified to a broad class of geometries, cylindrical shells, spherical shells, conical shels, zero-curvature shells (i.e., plates: rectangular, circular, etc.), beams, etc. Applications of the theories to a cylindrical shell using four system parameters, two Lame’s parameters and two radii of curvature, are demonstrated.
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Li, H., S. D. Hu, and H. S. Tzou. "A Diagonal Piezoelectric Energy Harvester on Clamped-Free Conical Shells." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63030.

Повний текст джерела
Анотація:
Thin shells are common engineering structures and they have great potentials to harvest more energy from ambient vibrations. The conical shells are forced to vibrate due to the external excitation, and this kinetic energy can be extracted using piezoelectric materials. Recent sensing analyses indicate that a straight piezoelectric patch may output no voltage due to the axisymmetric of conical shells. This study is to address this issue and to overcome the zero output problems. A diagonal piezoelectric patch is proposed for conical energy transduction and harvesting. The diagonal harvester patch shows no symmetry in the longitudinal or circumferential direction for all shell modes. This configuration guarantees the energy output for all natural modes. A mathematic model of the diagonal piezoelectric harvester is given and an open-circuit output voltage of the diagonal energy harvester is derived based on the thin-shell theory and the Donnel-Mushtari-Valsov theory. Then, the distributed modal energy harvesting characteristics of the proposed diagonal piezoelectric conical shell harvester are evaluated in case studies. Numerical results prove that the proposed diagonal piezoelectric energy harvester outputs energy for all known modes. The energy amplitudes vary with the modal shapes. Next the diagonal stripe is divided into several small patches, each patch has separate electrodes. Therefore the output energy amplitudes indicate the energy distribution over the conical harvester surface. The results show that, for each mode with unit modal amplitude, the distribution depends on the mode shape, harvester location, and geometric parameters. The regions with high strain outputs yield higher modal energies.
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Karimi Mahabadi, Rayehe, and Firooz Bakhtiari-Nejad. "Optimization of Joined Conical Shells Based on Free Vibration." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65612.

Повний текст джерела
Анотація:
This work aims at utilizing genetic algorithm (GA) to pursue the optimization of joined conical shells based on free vibration. Semi-vertex angles of cones and fibre orientation of the laminated composite are considered as design variables. First, the model is simulated in ABAQUS, the model is validated by comparing its results to other obtained from the literature. Then the first non-zero natural frequency of isotropic joined conical shell is maximized by changing the two semi-vertex angles of cones. Last the fibre orientation of laminated joined shells are optimized to achieve the maximum natural frequency.
Стилі APA, Harvard, Vancouver, ISO та ін.
Також вас можуть зацікавити розширені добірки на тему "Conical shells" для конкретних типів джерел:
Статті в журналах Дисертації
Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!

До бібліографії