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Engineering · Mechanical Engineering
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SULIT (ENT242) Question B2 Soalan B2 (a) The bar is made of a metal alloy having a stress-strain diagram, which is approximated as shown in Figure 7. Determine the elongation of the square hollow bar when it is subjected to the axial force P 120 kN. The load is removed before being reload with force P 360 kN and then released, estimate the final elongation of the bar Bar adalah diper buat daripada logam aloi yang mempunyai diagram tegasan-terikan yang dianggarkan seperti di dalam Gambarajah 7, Tentukan pemaniangan yang berlalu kepada bar bergeronggang segiempat sama apabla dilkenakan daya mendar P120 NJika sekirarya daa memdalar ii ditingkatkan kepada P- 360 kN, ramalkan pemanjangan abhir barersebuj (14 Marks/Markak) o(MPa) 500 600 mm 250 50 mm 5 mm 00125 0.05 e (mm/mm) 50 mm Figure 7 Gambarajah7 (b) Would a round tube with a diameter of 50 mm and thickness of 5 mm out-perform the above square hollow bar if it is made from the same material? Why? Adakah satu tiub bulat berdiameter 50 mom and berketebalan 5 mm akan mengatasi bar berongga segiempat di atas jika iarva dibuat daripada bahan yang sama? Kenapa?] (6 Marks /Markah) -00000- SULIT icetak oieh Unit Peperiknaan dan Pengjiazahan, Bahagian Pengunsan Akademik Jabatan Pendaflar

mechanic of materials (soild)

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