Degradation of fiber-reinforced composite materials at cryogenic temperature. Part I uniaxial tensile and pure torsional fatigue

Journal Article · Fri Jan 01 00:00:00 EST 1982 · Adv. Cryog. Eng.; (United States)

DOI:https://doi.org/10.1007/978-1-4613-3542-9_18· OSTI ID:6267040

Wang, S S; Chim, E S.M.

Fatigue degradation of G-10 grade glass-fiber-reinforced composite laminates subjected to cyclic uniaxial tensile and pure torsional loading at cryogenic temperatures is studied. Specimens made from NEMA/ASTM G-10 grade composite laminates have a fiber content in the fill direction of about 75% by volume of that in the warp direction. Test procedures are given. Stress-strain curves and micrographs of various fatigue cycles are presented. Basic mechanical properties are listed. Conclusions based on the results are that 1) fatigue degradation at cryogenic temperatures can be described by changes in material stiffness; 2) stiffness reduction decreases monotonically on the number of loading cycles; 3) the surface condition is of great importance in controlling fatigue damage initiation, growth and cumulation; and 4) for the (t45) composite under tensile fatigue and the (0/90) lominate under torsional fatigue, matrix-dominated damage by interface debonding, matrix cracking, and both fiber and fabric buckling prevails throughout the material.

• Research Organization: University of Illinois, Urbana IL
• OSTI ID: 6267040
• Journal Information: Adv. Cryog. Eng.; (United States), Vol. 28
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
FATIGUE
REINFORCED MATERIALS
CRYOGENICS
ENERGY LOSSES
FIBERS
LOW TEMPERATURE
MATERIALS TESTING
MECHANICAL PROPERTIES
STABILITY
LOSSES
MATERIALS
TESTING
360303* - Composite Materials- Mechanical Properties- (-1987)