Degradation of Fiber-Reinforced Composite Materials at Cryogenic Temperatures, Part II—Multiaxial Fatigue

摘要: In an associated paper,1 cryogenic fatigue fracture of glass-fiber-reinforced composites subjected to in-phase, biaxial cyclic stresses has been studied. Both the life and failure mechanisms in have examined. It discussed2 that many engineering applications fiber-reinforced composites, consideration alone is not adequate for a reliable design other parameters measuring progressive damage material may be needed also. Since composite devices structures, which are usually under complex pulsating state electromagnetic mechanical stresses, designed on basis stiffness and/or stability considerations, naturally, degradation or modulus stress critical importance. Furthermore, stringent requirements maintaining proper temperature level achieve optimum performance (for example, superconductivity) led hysteresis energy dissipation internal damping during loading.