(SKMM2123) QUESTION 3 a) b) Define the shape factor, k. (1 mark) Figure Q3 (a) shows two (2) cross-sectional areas of be

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Skmm2123 Question 3 A B Define The Shape Factor K 1 Mark Figure Q3 A Shows Two 2 Cross Sectional Areas Of Be 1 (158.43 KiB) Viewed 45 times

(SKMM2123) QUESTION 3 a) b) Define the shape factor, k. (1 mark) Figure Q3 (a) shows two (2) cross-sectional areas of beams (A and B) which are made of same material. (2 marks) i) WITHOUT ANY CALCULATION, choose the cross sections of the beam that will give a higher value of the elastic moment, Me and plastic moment, Mp. ii) Which one is desirable in the design point of view. LOW or HIGH value of shape factor and explain why? b I b (A) (B) Figure Q3 (a) A nonsymmetrical cross sectional beam is made of an elastic-perfectly plastic material with or=240MPa. The cross sectional area of the beam is shown in Figure Q3 (b). (7 marks) 1) Determine maximum elastic moment, Me and plastic moment, Mp for this beam if the moment of inertia for the beam is 4.85 (107 mm'. ii) Calculate the shape factor of the beam. iii) Sketch the distribution of stress along the cross sectional area when the flange is about to yield. Flange 100mm 1 20mm 1 100mm Web Figure Q3 (b) 20mm *20mm Scanned with CamScanner