Title page for ETD etd-10192005-113320
|Type of Document
||Ifju, Peter G.
||The shear gage and compact shear specimen for shear property measurements of composite materials
||Materials Engineering Science
|Hyer, Michael W.
|Kander, Ronald C.
|Morris, Don H.
|Reifsnider, Kenneth L.
- Composite materials
- Moiré method
- Strains and stresses
|Date of Defense
Techniques for shear property measurements for composite and isotropic
materials were investigated. A new strain gage called the shear gage was
conceived, designed, and tested for routine shear characterization on notched
shear specimens. The shear gage integrates the shear strain in the entire test
section of the losipescu and compact shear specimens. The result was
consistent and accurate determination of the shear stress/strain response of
materials. Prior knowledge of material properties or shear strain distributions
were not required. Deficiencies in the losipescu shear test were automatically
compensated when shear gages were placed on the two faces of the specimen.
The shear gages were tested on composite and isotropic materials and produced
higher accuracy and consistency than could be produced using current
technology. Moiré interferometry was used to evaluate the ability of the shear
gage to measure the average shear strains. The results from the evaluation
program confirmed the attributes of the concept.
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