SEDL / STP / STP636-EB / STP27975S

Fatigue of Composites at Cryogenic Temperatures

Kasen, MB
Staff scientists, NBS-Institute for Basic Standards, Boulder, Colo

Schramm, RE
Staff scientists, NBS-Institute for Basic Standards, Boulder, Colo

Read, DT
Staff scientists, NBS-Institute for Basic Standards, Boulder, Colo

Pages: 11    Published: Jan 1977

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Abstract

A comparison has been made between the wearout rates of [0/± 45/0] boron/epoxy and boron/aluminum composites in low-cycle fatigue at 295 and 76 K. Using degradation of modulus as the wearout criterion, these preliminary data indicate that cryogenic temperatures have a negligible effect on either tensile or compressive fatigue performance of boron/epoxy. A similar indication was obtained for boron/ aluminum in tensile fatigue. These conclusions are substantiated by high-cycle fatigue results on boron/epoxy.