Tube comprising composite layers with different modulii of elasticity
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United States of America Patent
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Mar 19, 1996
Issued Date -
N/A
app pub date -
May 11, 1995
filing date -
Mar 2, 1988
priority date (Note) -
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Abstract
A composite material tube, withstanding the internal pressure, and comprising at least two layers of pressure reinforcement fibers, or pressure resistant layers, wound at an angle at least equal in absolute value to 70.degree., with respect to the center axis of the tube. The two layers both undergo radial expansion under an effect of the pressure, with one of these two layers being inside the other. A circumferential modulus of elasticity of the external layer is greater than the circumferential modulus of elasticity of the internal layer.
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