Influence of parameter variations on the fatigue behavior of magnet insulation systems

Fatigue behavior of an insulation system for the ITER magnets in the load and strain controlled mode

“…ref. [17]), the present fatigue investigations were performed along the lines of the ASTM D 3479 standard as well, but under sinusoidal strain control at R-ratios of 0.3 and 0.5. In order to obtain strain-lifetime diagrams (ε/N curves), various strain levels ranging from 80 to 40% of the breaking strain were chosen and investigated up to 10 6 cycles to failure.…”

“…In an earlier paper [17], we reported on the influence of the R-ratio and of the test frequency on the tension-tension stress-lifetime diagrams of a glassfiber/epoxy pre-preg in the load controlled mode. For increasing R-ratios from 0.1 to 0.5 and at a certain number of cycles, the results indicated an enhancement in the residual strength data by about 10%.…”

Strength characterization of woven glass/epoxy composites under tensile fatigue loading at cryogenic temperatures using open hole specimens

“…For example, Reed and Golda 9 reviewed the static and fatigue properties of various composites at cryogenic temperatures. Bittner-Rohrhofer et al 10 discussed the influence of the fatigue test parameters on the cryogenic composite behavior under cyclic load. Prokopec et al 11 examined the cryogenic mechanical properties of irradiated GFRP composites.…”