Question

4. An Am1004-T61 magnesium tube is bonded to a central A36 steel rod. Sketch and label the shear stress distribution across the entire radius of the composite member when a torque of 4.8 kN-m is applied. Sketch the corresponding shear strain distribution. 900 mm 80 mimA 40 mm 80 mm4 40 mm 5. For the composite member of Problem 4, assume that both materials are perfectly plastic once they yield. Furthermore, assume that the shear yield stress of the magnesium is 88 MPa and the shear yield stress of A36 is 140 MPa. What is the plastic torque for the composite member, i.e. the torque when the entire cross section has yielded?

Answer 1

I tomm 900 mm Torgue Reansted by steel Rod torzue Resisted magnesun tubeTm TTm 79.3 C Pa n Paralel Connecton 79.3 X N/mm2 So 75 XIO N/mm Tm L Sometimes t9kon y J 4 J 0)25/327.4 nmt m Tm 61x37699- 2. 75X10251327- 4 32 37 69911-2 mmt T-3 6Tm- o 2 _ SJnm eg votion O and Lsaeel a KE 20 mm) TS 3 7 5 6.5 N 3756.5 x2o 3 N/mm2 251327-4 Tm=o4& . 4¢ N nt20mmo4348 376 9911.2 X 20 O055 NIM»2 Steel o055 Strain yoriatHon Stress distriootion