Strathprints logo
Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

The micropolar elastic behaviour of model macroscopically heterogeneous materials

Beveridge, Andrew James and Wheel, Marcus and Nash, David (2013) The micropolar elastic behaviour of model macroscopically heterogeneous materials. International Journal of Solids and Structures, 50 (1). 246–255. ISSN 0020-7683

[img] Microsoft Word
Wheel_MA_Pure_Micropolar_elastic_behaviour_of_model_macroscopically_heterogeneous_matrials_Oct_2012.doc - Draft Version

Download (5MB)

Abstract

This paper describes the design, manufacture, testing and analysis of two model heterogeneous materials that exhibit non classical elastic behaviour when loaded. In particular both materials demonstrate a size effect in which stiffness increases as test sample size reduces; an effect that is unrecognized by classical elasticity but predicted by more generalized elasticity theories that are thought to describe the behaviour of heterogeneous materials more fully. The size effect has been observed by both experimental testing and finite element analysis that fully incorporates the details of the underlying heterogeneity designed into each material. The size effect has been quantified thus enabling both the modulus and also the characteristic length, an additional constitutive parameter present within micropolar and other generalized elasticity theories, to be determined for each material. These characteristic length values are extraordinarily similar to the length scales associated with the structure of the materials. An additional constitutive parameter present within plane micropolar elasticity theory that quantifies shear stress asymmetry has also been determined for one of the materials by using an iterative process that seeks to minimize the differences between numerical predictions and test results.

Item type: Article
ID code: 41348
Keywords: heterogeneous material , micropolar elasticity, size effect, Mechanical engineering and machinery, Mechanics of Materials, Modelling and Simulation, Materials Science(all), Mechanical Engineering, Applied Mathematics, Condensed Matter Physics
Subjects: Technology > Mechanical engineering and machinery
Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Depositing user: Pure Administrator
Date Deposited: 08 Oct 2012 09:59
Last modified: 27 Mar 2014 10:33
URI: http://strathprints.strath.ac.uk/id/eprint/41348

Actions (login required)

View Item View Item