Material Selection:          
Upper Links       Lower Links    
Outside Diameter 1.500 in   Outside Diameter 2.000 in
Wall Thickness 0.125 in   Wall Thickness 0.250 in
Material Used Mild Steel (1018)   Material Used Mild Steel (1018)  
Rod End Rated Load 55,000 lb   Rod End Rated Load 55,000 lb
Modulus of Elasticity 29,000,000 psi   Modulus of Elasticity 29,000,000 psi
Yield Strength 50,000 psi   Yield Strength 50,000 psi
Density 0.2840 lbm/in^3   Density 0.2840 lbm/in^3
Moment of Inertia 0.129 in^4   Moment of Inertia 0.537 in^4
Area 0.540 in^2   Area 1.374 in^2
Pyield 26,998 lb   Pyield 68,722 lb
Pbuckling 46,468 lb   Pbuckling 122,002 lb
Pbending 1,219 lb   Pbending 3,026 lb
Link Length 28.1514 in   Link Length 35.4903 in
Link Weight 4.32 lb   Link Weight 13.85 lb
Link Force 7,129 lb ("+" because link is in tension) Link Force 7,129 lb ("-" because link is in compression)
F.S. Yield 3.79 (This is your link stretching)   F.S. Yield -9.64 (This is your link compressing)
F.S. Buckling 6.52 (This is your link buckling under braking) F.S. Buckling -17.11 (This is your link buckling under acceleration)
FS Bending  0.47 (This calculation is somewhat irrelevant for an UPPER link) F.S. Bending 1.16 (This is your link bending over a rock w/ 1/2 the weight of your truck on it)
F.S. Rod End 7.71 (This is your rod end breaking) F.S. Rod End -7.71 (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 29,000,000 50,000 0.2840
Lower Link Material 29,000,000 50,000 0.2840