Question

L2 B r3 L1 T 12 r Consider the torsion spring above. The shafts have shear moduli of Gen- ?? ksi, GAn 15,000 ksi, and consists of a solid inner shaft CB which is surrounded by and attached to a tube AB using a rigid ring at B. The ring at A can also be assumed rigid and is fixed from rotating. The geometry is given as r, 0.50 in, r, 1.0 in, r-0.8 in, and L, 12 in and La 14 in. If the allowable shear stresses for the shafts are Ta Ca 20 ksi, TA 15 ksi, and the maximum angle of twist at Cis 2.4 determinate the shear modulus Ga such that the maximum allowable external torque T is applied to the spring. Report your answer in ksi to one decimal place and place your answer in the box below.

Answer 1

o5 in Ln 12 i G1AB 15,ooo Ksi = 20 KSi aul CB Tall 15 KSi AB- 2.4 We T (4L2) attaehed voith Band e B s hatt AB at Sixud at A Shat AB is CS anned wit et e ner 2.4

-Pram relatim determina 9e 1st てAB XLAB RAB o00 x 1 .014 ad C O. O141go O. 02 h.T3 2.4- Oa NoW 0-802 -h. 58 Aain L てBe x LC Ree (12-+ 14 11 1.598 x T 180 O-5 X 3子288 .8チKSi 2 Scahne CamSo CS ila
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