Development of an Apparatus for Biaxial and Shear Stress-Strain Testing of Fabrics and Films
Final rept. Oct 1975-Sep 1979
ARMY NATICK RESEARCH AND DEVELOPMENT CENTER MA
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This report describes the design, construction and evaluation of an apparatus for the measurement of the behavior of fabrics under biaxial tensile and shear forces. The instrument was evaluated by the testing of fabrics ranging in weight from 34 gm to 486 gm, corresponding to material applications ranging from lightweight parachute fabrics to heavyweight ballistic fabrics. The testwork demonstrates that the instrument, within the limitations of the testing techniques developed to date, can be used to provide the information necessary for the design of structural fabrics, the drafting of improved procurement specifications for fabrics and qualification of new fabrics for military applications. Technical problems and limitations of the instrument and of the testing techniques which require further study are discussed.