Experimental Mechanics, Tool to Verify Continuum Mechanics Predictions

Author ORCID Identifier

Holly Jones:https://orcid.org/0000-0002-5512-9958

Publication Title

Conference Proceedings of the Society for Experimental Mechanics Series

ISSN

21915644

E-ISSN

21915652

ISBN

9783030300081

Document Type

Conference Proceeding

Abstract

This paper is devoted to the experimental verification of a very fundamental concept in the mechanics of materials, the representative volume element (RVE). This concept is a bridge between the theoretical concept of the continuum and the actual discontinuous structure of matter. We begin with reviewing the pertinent concepts of the kinematics of the continuum, the mathematical functions that relate displacement vectorial fields, the recording of these fields by a sensor as scalar fields of gray levels. The derivative field tensors corresponding to the Eulerian description are then connected to the deformation of the continuum. The differential geometry that provides the deformation of an element of area is introduced. From this differential geometry of an element of area, the Euler-Almansi tensor is extracted. Properties of the Euler-Almansi tensor are derived. The next step is the analysis of the relationship between kinematic and dynamic variables: that is, the connection between strains and stresses in the Eulerian description between the Euler-Almansi tensor with the Cauchy stress tensor. In the experimental part of the paper, some relationships between components of the Euler-Almansi tensor are verified. An example of an experimental verification of the concept of RVE is given. Finally, the verification for the fact that the Euler-Almansi and Cauchy stress sensor tensors are conjugate tensors in the Hill-Mandel sense is presented.

First Page

13

Last Page

32

Publication Date

1-1-2020

DOI

10.1007/978-3-030-30009-8_3

Keywords

Cauchy stress tensor, Derivatives of displacements, Euler-Almansi strain tensor, Kinematical variables, Representative volume element (RVE), Statistical volume element (SVE)

Department

Department of Mechanical Engineering

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