Journal
EXPERIMENTAL MECHANICS
Volume 41, Issue 3, Pages 260-269Publisher
SAGE PUBLICATIONS INC
DOI: 10.1007/BF02323143
Keywords
woven composite reinforcements; constitutive model of fabrics; biaxial tests; cross-shaped specimen; fabric shaping; process simulations
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This paper presents experimental studies on the mechanical behavior of fiber fabrics using a biaxial tensile device based on two deformable parallelograms. The cross-shaped specimens are well adapted to fabrics because of their lack of shear stiffness. Tension versus deformation curves, for different strain ratios, are obtained in the case of composite woven reinforcements used in aeronautic applications. It is shown that the tensile behavior of the fabric is strongly nonlinear due to the weaving undulations and the yarn contraction, and that the phenomenon is clearly biaxial. A constitutive model is described and identified from the experimental data. The essential role played by the yarn crushing will be pointed out.
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