Material Selection:          
Upper Links       Lower Links    
Outside Diameter 1.375 in   Outside Diameter 2.500 in
Wall Thickness 0.090 in   Wall Thickness 0.188 in
Material Used Titanium 6Al-4V   Material Used Mild Steel (1018)  
Rod End Rated Load 55,000 lb   Rod End Rated Load 55,000 lb
Modulus of Elasticity 16,500,000 psi   Modulus of Elasticity 29,000,000 psi
Yield Strength 128,000 psi   Yield Strength 50,000 psi
Density 0.1600 lbm/in^3   Density 0.2840 lbm/in^3
Moment of Inertia 0.075 in^4   Moment of Inertia 0.918 in^4
Area 0.363 in^2   Area 1.366 in^2
Pyield 46,506 lb   Pyield 68,276 lb
Pbuckling 10,405 lb   Pbuckling 143,000 lb
Pbending 1,634 lb   Pbending 3,427 lb
Link Length 34.3438 in   Link Length 42.8748 in
Link Weight 2.00 lb   Link Weight 16.63 lb
Link Force 5,412 lb ("+" because link is in tension) Link Force 5,412 lb ("-" because link is in compression)
F.S. Yield 8.59 (This is your link stretching)   F.S. Yield -12.62 (This is your link compressing)
F.S. Buckling 1.92 (This is your link buckling under braking) F.S. Buckling -26.42 (This is your link buckling under acceleration)
FS Bending  0.63 (This calculation is somewhat irrelevant for an UPPER link) F.S. Bending 1.32 (This is your link bending over a rock w/ 1/2 the weight of your truck on it)
F.S. Rod End 10.16 (This is your rod end breaking) F.S. Rod End -10.16 (This is your rod end breaking)
Material Specifications:
Elastic Modulus Yield Density
(psi) Strength (Lbs/in^3)
Mild Steel (1018)         29,000,000                          50,000 0.2840 Cold Drawn
Chromoly (4130)N         29,700,000                          63,100 0.2840 Normalized
Chromoly (4130)T         29,700,000                        110,000 0.2840 Water Quenched and Tempered
4340N         29,700,000                        114,000 0.2840 Normalized
4340T         29,700,000                        160,000 0.2840 Oil Quenched & Tempered
Alum 7075-T6         10,400,000                          73,200 0.1020
Alum 2024-T6         10,500,000                          50,000 0.1000
Titanium 6Al-4V         16,500,000                        128,000 0.1600 6% Aluminum, 4% Vanadium
Alum 6061-T6         10,000,000                          39,900 0.0975
Mild Steel 30,000,000 63,250
Titanium 40,000,000 64,500
Aluminum 50,000,000 65,750
300M 60,000,000 67,750
Elastic Modulus Yield   Density
(psi) Strength (psi)   (Lbs/in^3)
Mild Steel (1018) 29000000 50000 0.2840
Chromoly (4130)N 29700000 63100 0.2840
Chromoly (4130)T 29700000 110000 0.2840
4340N 29700000 114000 0.2840
4340T 29700000 160000 0.2840
Alum 7075-T6 10400000 73200 0.1020
Alum 2024-T6 10500000 50000 0.1000
Titanium 6Al-4V 16500000 128000 0.1600
0 0 0.0000
0 0 0.0000
0 0 0.0000
0 0 0.0000
0 0 0.0000
Alum 6061-T6 10000000 39900 0.0975
         
Upper Link Material 16,500,000 128,000 0.1600
Lower Link Material 29,000,000 50,000 0.2840