Characterization of material properties using strain mapping and reverse engineering

Lin Lianshan, Li Haiyan, Alex S L Fok

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

For simplicity, the material properties used in engineering analysis are often assumed to be linear elastic, Isotropic and homogeneous. These simplifications may lead to erroneous stress and failure predictions if the materials involved are highly nonlinear, anisotropic and inhomogeneous. Based on the techniques of strain mapping and reverse engineering, a simple finite-element-based method has been devised with the aim of characterizing the properties of such materials under load. The method has been implemented into the commercial finite element code ABAQUS, via its User Material Subroutine (UMAT), to allow material characterization to be performed easily. Verification of the method has been carried out using simulated examples and the results showed rapid convergence of the method with good accuracy. The method has also been applied successfully to actual mechanical testing of graphite.

Original languageEnglish (US)
Title of host publicationProceedings of 8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA 2006
StatePublished - Dec 1 2006
Event8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006 - Torino, Italy
Duration: Jul 4 2006Jul 7 2006

Publication series

NameProceedings of 8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006
Volume2006

Other

Other8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006
CountryItaly
CityTorino
Period7/4/067/7/06

Keywords

  • Elastic constants
  • Finite elements
  • Inverse problems
  • Material characterization

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