" iron rivets, "Burden's best," machine-driven. Punched holes: Punch, ".695 diameter; die, ".752 diameter. Sheared the rivets; all rivets appeared to shear at same time. Fractured slightly two rivets under upper heads. Fractured all the rivets Square inches 2.45 1.57 .882 1.92 under the lower heads. No fractures started in the steel plates. Average elongation of holes in the plate, ".07. Under plate, 10"x".247. " iron rivets, "Burden's best," machine-driven. Punched holes: Punch, ".695 diameter; die, ".752 diameter. After the ultimate load was passed and the pressure running down gradually the rivets sheared not simultaneously, as appeared to be the case with A., but one rivet snapped first, quickly followed by the second and third; the two remaining rivets sounded as one when they parted. Maximum loads on joints. Tensile strain on gross section of plate Compressive strain on bearing surface of rivets Pounds per sq. inch. 29, 430 46, 010 81,780 37,860 " steel rivets, machine driven. Punched holes: Punch, ".69 diameter; die, ".75 diameter. Ultimate failure occurred by shearing the upper plate through the metal, as shown by the lines in the sketch. The first fracture which Square inches. 2.45 1.57 .882 1.92 appeared in sight was at the end section at A. Holes in the under plate elongated about " each. Appearance of fractures: Silvery scale not disturbed on the body of the specimen. Lap ends of plate bent about 120. Punched holes: Punch, ".69 diameter; die, ".75 diameter. 10" × 247 1:08 2.10 2.pitch. 1:02 Calked joint. 10" x .247 Joint failed similar to A A. by shearing plate, fractures beginning at the rivet holes. Test discontinued before the fractures were all developed, the first fracture appearing at the second rivet from side of plate. Maximum loads on joint. Tensile strain on gross section of plate.. Compressive strain on bearing surface of rivets Pounds per sq. inch. 37,895 59, 240 105, 290 48, 750 |