This investigation was undertaken to evaluate the damage tolerance of typical graphite/epoxy structure to service damage AS/3501 graphite/epoxy I-stifflened panels and honeycomb panels were fabricated and its tolerance to lowvelocity impacts was measured. Three impact treats were investigated; runway stones, a blunt impactor with a tip radius of 0.64 cm (1/4 inch), and a blunt impactor with a tip radius of 2.54 cm (1 inch). Impact parameters were selected that would just cause visual damage. This worked well for the runway stones, but for the tests of the one-inch penetrator on the honeycomb panels visual damage was not easily observed. C-scan damage was, however, easily detectable. Residual strength specimens were cut from the damaged panels and tested. The specimens contained damage at levels of 70, 100, 130 % of the level to cause visual (or C-scan) damage. (DePo)
Investigation of damage tolerance of graphite/epoxy structures and related design implications
Untersuchung der Schadenstoleranz von Graphit-Expoxidharz-Verbundwerkstoffen
US Government Reports ; 1-72
1976
72 Seiten
Report
Englisch
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