4.73 and 4.74 A beam of the cross section shown is made of a steel that is assumed to be elastoplastic with E = 200 GPa

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4 73 And 4 74 A Beam Of The Cross Section Shown Is Made Of A Steel That Is Assumed To Be Elastoplastic With E 200 Gpa 1 (23.95 KiB) Viewed 16 times

4.73 and 4.74 A beam of the cross section shown is made of a steel that is assumed to be elastoplastic with E = 200 GPa and oy = 240 MPa. For bending about the z axis, determine the bending moment at which (a) yield first occurs, (b) the plastic zones at the top and bot- tom of the bar are 30 mm thick. 30 mm 30 mm 2 90 mm 30 mm 15 mm 15 mm - 60 mm 30 mm Fig. P4.73 Fig. P4.74