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The Microstructure Topology Optimization Of Silicate Nanocomposites

Posted on:2014-12-12Degree:MasterType:Thesis
Country:ChinaCandidate:Q YanFull Text:PDF
GTID:2251330401490124Subject:General and Fundamental Mechanics
Abstract/Summary:PDF Full Text Request
Layered Silicate Nanocomposites refers silicate wafer gap which is inserted into the polymer chain, using the appropriate the monomer insertion silicate gap and then polymerization, the polymer chain is inserted directly from a solutionthe silicate layers gap melt intercalation method Layered silicate Nanocomposites.Layered silicate mainly from natural montmorillonite, also known as polymer/clay nanocomposites, today most scholars of concern for the composites of a polymer nanocomposites. Discuss random non-homogeneous material performance is often applied to the basic idea of "homogenized". Taking into account throughput control the microscopic structure of the components and their distribution, to enable the performance of the material is improved. Changes in the structure caused by changes in the chemical and mechanical properties. The main work is as follows:1, The material space randomness force people to re-examine the basic concepts of various types of continuous solid mechanics. Representative volume element (RVE) to discuss the Dirichlet and Neumann boundary value problem,calculation of the effective performance of the obtained composite material. Composite micro-stress field is given to predict the size of the RVE impact on overall performance.2, Silicate nanocomposites as the research object, and are completely stripped, In this paper, a means of regulating the distribution of the microstructure of the material to its performance has been improved. Based on the the progressive homogenization method and the ANSYS Parametric Design Language periodic boundary conditions, four different micro-structure topology optimization design model, using the finite element method to calculate the equivalent representative volume element in a certain elastic deformation under stress, strain, with The APDL write result handler of the finite element calculations to solve the effective elastic moduli (Polymer Nanocomposites). Progressive uniform method as the theoretical basis to calculate the equivalent cell characteristics.3,Based on the progressive homogenization method and ANSYS Parametric Design Language periodic boundary conditions. While rotating the the monolithic microstructure, the unit cell was solved using ANSYS finite element program. Summarize and contrast the case of finite element method to calculate the different angles of the stress-strain relationship, summarize the effective elastic modulus distribution law.
Keywords/Search Tags:Polymer-nanoparticle composites, Topology optimization, Theequivalent continuum micromechanics, RVE, Asymptotic homogenization theory, Modulus of elasticity
PDF Full Text Request
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