Question

Name: Section: Problem 6 Three materials are used to make a composite beam with a rectangular cross section. Select the transformed section if materials 1 and 3 are transformed into material 2. E, = 10 ksi, Ez = 20 ksi, Ez = 30 ksi Drawn to scale a) b) c) d) e) None of the above MI M2 M3 Problem 7 Determine the polar moment of inertia for the hollow tube. a) 2,789.7 in b) 44,635.7 in c) 25.1 in d) 3,771.5 int e) None of the above 14 in 10 in Problem 8 The shear diagram is provided for the loaded beam. Which moment diagram is correct? 10 kips 2 k/ft 3 k/ft 1.35 kip-ft 4 ft. 1 ft. 3 ft. 3 ft. 4.8 kips 2 ft. 16.25 kips 1.45 kips Shear Moment (b) c)

Answer 1

Answers

6....c

7....a

8....b

Explanations provided below

Problem 6 while trous forming bnews EL x bold Ez Transform a to I 20 bei= bx 20 - 2 lol & Transform - by OE bi TE 3 (d)

Problemt Polar Moment Inoatia I nown T Ja 32 ode 1 1 *(0,"-d:") th x 32 ñ Cray-10") ll 32% - 2 789.finu (a)

Problem 8 dua v dn a Area of Difference in ence in Moment diagram shoor dig, Alpo slope of moment diagram is of the characteristic of phoon diagram. So obtion (b) is correct as there is a end. slight moment ak