Question

An alumnum lloy has dastie modulus 70,000 MPa idd stength 15o MP, teutile shesgth 2 3Bo M and no Elengalz25 A bay of ths alley has unstressed dimensous suu Itu aiven a teusile streas sholo yoo Find the tewssle stress in Mra). FIHOON SFind the leyth of the bar under sthess ppore yw ncveuse tha foree E Atwhat for will the bar beone plastic

Answer 1

in aluminium alloy has following properties elastic modulus (E)- 70,000 MPa Vield strength (%) = 150 MPa. Iloma loom] Tensile strength Cours)- 230 MRa Elongation = 25%. length = 400m Diameter 4 om 2 4x10 m fore applied- 14000 ay Tensile stress(z)= -743xronto 1400x106. 2. 7 x8 $ -155.MPa] I F-1400N (6) let Al be the elongation . Thesi by Hook's low n En Stress S strain length stress s a 400 of bour Ə E = Sx400 230 MAH 3.45 B 5*407 - 01318m A length of the lo bar = (400+ 0.318) - 400.318m. (c) a Plastic behaviour After crossing the yield strength the plastie as estasts. . So, after 150 MPa stress plasticity generates stress. Il Felastic 257. elongating F='sx A = 150x24YN beharious TE=3769. 9N3769190 strain ISOM