STRESSES IN AND GENERAL INSTABILITY OF MONOCOQUE CYLINDERS WITH CUTOUTS VII - EXPERIMENTAL INVESTIGATION OF CYLINDERS HAVING EITHER LONG BOTTOM CUTOUTS OR SERIES OF SIDE CUTOUTS

摘要

Eight 24S-T1 Alclad cylinders 20 inches in diameter and 0.012 inch in sheet thickness were tested in. pure tending. They were between 57.87 and 77.16 inches long and were reinforced with 16 stringers and from Ik to 29 rings of various cross-sectional areas and spacings. Of these, five had a 1*5° cutout on the compression side extending over 33.44, 34.72, or 51.44 inches in the axial direction. The remaining three had a series of five 1*5° cutouts on each side.nAll but one cylinder failed in general instability. The one that did not show the general-instability pattern failed in tension.