SEDL / STP / STP521-EB / STP36491S

Some Important Aspects in Testing High-Modulus Fiber Composite Tubes in Axial Tension

Sullivan, TL
Aerospace technologists, Lewis Research Center, National Aeronautics and Space Administration, Cleveland, Ohio

Chamis, CC
Aerospace technologists, Lewis Research Center, National Aeronautics and Space Administration, Cleveland, Ohio

Pages: 16    Published: Jan 1973

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Abstract

Tubular specimens were potted in metal grips to determine the feasibility of this gripping method in applying multiaxial loads. Strain gage rosettes were used to assess grip transitional strains, through thickness strain variation and strain variations along the tube length and circumference. The investigation was limited to loading 0, 45, ±45, and 90-deg graphite/epoxy and glass/epoxy tubes in axial tension. Results include modifications made to the grips to reduce transitional strains, illustrations of the tube failure modes, and some material properties. The gripping concept shows promise as a satisfactory technique for applying multiaxial loads to high-strength, high-modulus fiber composite tubes.