A center-cracked plate made of ASTM A470-8 (Cr-MoV) steel has given width b = 42 mm and thickness := 4 mm and is subject

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A Center Cracked Plate Made Of Astm A470 8 Cr Mov Steel Has Given Width B 42 Mm And Thickness 4 Mm And Is Subject 1 (55.88 KiB) Viewed 27 times

A center-cracked plate made of ASTM A470-8 (Cr-MoV) steel has given width b = 42 mm and thickness := 4 mm and is subjected to a given tensile force P= 80 kN. a) For a crack length a=6 mm, determine the safety factors against brittle fracture and fully plastic yielding. Xk and X'. (20 points). b) Repeat for a=23 mm (20 points) c) Assume that this plate is an engineering component and comment on its safety for the two different crack lengths (answer (a) and (b)). (10 points). * $ 100 620 Table 8.1 Fracture Toughness and corresponding Tensile Properties for Representative Metals at Room Temperature Toughness Yield Ultimate Elong Red. Area Material KN 100 SRA MPavm MP MP (isiin ksi) (a) Steel AISI 11:44 66 530 840 7 (122) ASTM A470- 60 780 17 45 Cr-Mo V) (55) (90) (113) ASTM A517-4 187 700 8:30 20 (170) (110) (121) AISI 4130 110 1020 1150 49 (100) (158) (167) 18. Ni managing 123 1310 1350 12 34 air melted (112) (190) (196) 18. Ni maraging 176 1345 15 acum mclied (160) (187) (195) 300M 152 1070 1190 56 6509Cemper (138) (156) (172) WOM 17:40 2010 WC temper (59) (252) (291) 14 04 TO *=112873 k=1 18 Expresswalk 12 48 1-05 GEST -