General Anisotropy Identification of Paperboard with Virtual Fields Method

This work extends previous efforts in plate bending of Virtual Fields Method (VFM) parameter identification to include a general 2-D anisotropic material. Such an extension was needed for instances in which material principal directions are unknown or when specimen orientation is not aligned with ma...

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Bibliographic Details
Published inExperimental mechanics Vol. 54; no. 8; pp. 1395 - 1410
Main Authors Considine, J.M., Pierron, F., Turner, K.T., Vahey, D.W.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.10.2014
Subjects
Biomedical Engineering and Bioengineering
Characterization and Evaluation of Materials
Control
Dynamical Systems
Engineering
Lasers
Optical Devices
Optics
Photonics
Solid Mechanics
Vibration
Paperboard
Digital image correlation (DIC)
Stiffness
Anisotropy
Virtual fields method (VFM)
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Summary:This work extends previous efforts in plate bending of Virtual Fields Method (VFM) parameter identification to include a general 2-D anisotropic material. Such an extension was needed for instances in which material principal directions are unknown or when specimen orientation is not aligned with material principal directions. A new fixture with a multi-axial force configuration is introduced to provide full-field strain data for identification of the six anisotropic stiffnesses. Two paper materials were tested and their Q ij compared favorably with those determined by ultrasonic and tensile tests. Accuracy of VFM identification was also quantified by variance of stiffnesses. The load fixture and VFM provide an alternative stiffness identification tool for a wide variety of thin materials to more accurately determine Q 12 and Q 66 .
ISSN:0014-4851
1741-2765
DOI:10.1007/s11340-014-9903-1