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Strength Analysis and Investigation about Laminated Structures Based on Numerical Method

Author: RenTao
Tutor: HuangShuHong；LiRenFu
School: Huazhong University of Science and Technology
Course: Thermal Power Engineering
Keywords: Layered structure Honeycomb Core Tablet Finite Element Nonlinear High-end center ITER The first wall of the cladding
CLC: O342
Type: Master's thesis
Year: 2011
Downloads: 22
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Abstract

Layered composite structure because of its unique performance advantages, more and more extensive applications in the energy and other industries. Accurately predict and evaluate the structural deformation by mechanical and thermal loads and stress characteristics related to the safety and economy of the whole structure running conducive to its structural optimization design to provide a reference. The particularity of the structure of the layered composite structure, there is hope in the strength analysis to complex three-dimensional problems effectively reduced to a two-dimensional problem to deal with. Shell theory for laminated composite plates have this three-dimensional structure of the laminated composite plate problem simplified two-dimensional or quasi-two-dimensional problem to deal with, but because many of the assumptions of this theory take does not apply to all layered structure, for example, similar to the International Thermonuclear Experimental Reactor (ITER) shielding the first wall of the cladding layer so that the layered composite structure, there are large differences in the structural characteristics and the lamina, is currently only used or full Test Method three-dimensional numerical simulation to study the characteristics of the deformation and stress in the high heat load. This article is based on the theory of nonlinear high-end center, hope to solve this problem through the establishment of the new finite element model. The honeycomb sandwich layered composite structure developed from the higher order nonlinear center theory, the deformation of the different layers of the layered composite structure of the honeycomb sandwich using a different higher order displacement mode, considering the compressibility and deformation of the center sandwich non-linear, and has been validated for different aspect ratio of the honeycomb sandwich plate has a very good applicability. In this article, the first honeycomb sandwich structure, the application of the finite element analysis method on a different aspect ratio honeycomb sandwich layered composite plate, three-dimensional elastic analysis under different load conditions to verify the force-deformation performance advantages, static and dynamic load under deformation characteristics. And then based on the theory of nonlinear high-end center of honeycomb sandwich layered tablet, the establishment of a new finite element model, the three-dimensional problem is reduced to a two-dimensional honeycomb sandwich structure problem, and before The three-dimensional elastic solution were compared to verify the accuracy of the model. In addition, in this article by the value of some other classic examples to further verify the effectiveness of the finite element model of the nonlinear higher order center. Preliminary attempt to expand the application of the finite element model of the nonlinear higher order center ITER shield cladding wall layered structure calculation and design thermal load and the temperature of the maximum heat load conditions structure, stress and thermal strain analysis to verify the basis for the future expansion of higher order nonlinear theory application.

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