Question

Question Completion Status: Question 2 1 points Save Arwe 1. The following is a one-layer truss structure fabricated from aluminum tubing with outside diameter and wall thickness as 0.4 inch and 0.05 inch, respectively. The Young's modulus and Poisson's ratio for aluminum are E-10 x 10°psi, v=0.33, respectively. The applied food is 60tb. = 60 B Ra Rb L The internal force for member AC is: O 30 lb 34.6 lb O 34,6 lb 30 lb

Answer 1

☺ Selection - Güven's Tube Outside Diameter (DC) = 0.4 inch Tube' kell Thicknes (t) = 0.05 ines E = 10x10 opsi = 0.33 zu P load (P) = 60 lb GO ABC ex equilateral Triangle Because of Equal Angle between these side it Two side And O266 Go B A E IRB 'RA Internal force for member Ac? At Equilibrium Joint a Horizontal force Z FA zo FAC Sinbo = fac singo с FAC = foc 30 FAC 1 30 FBc. Vertical force E Fvzo AC Cas. 30 of F&C Casso =P (FAC + fec) Cars Bo =P 2 FAC Casso = p = 60 FACZ 33.67lb lead in Compression in Member AC Because FAC Push the pointe

FAC= - 33.67 lb 2 strers is determined .FAC Anc nc Strain (s) = smes.co Young Modulus CE) Stran (Ex) en x-direction .u الدب 87. Ex= X eg E E E u EX+02 since hence ar ey = @za ou [647] stress in yt z direction if zero but does Not zero ex = Ey = 4 = - u op Calculation of strais is in x-direction uses only young modules. But in y.fz derection Needs both young modules. f poission ration So Need to Use both E and ll (1)