The modulus of rigidity defines a linear relationship

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The modulus of rigidity defines a linear relationship between shear stress and strain. = F A Shear: F F F = applied force A = cross section area = shear stress = G = shearing strain G = modulus of rigidity F F
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13 MAE 2 Material Properties Material Aircraft Steel 260 220 240 155 30 11 Stainless Steel 185 150 158 120 29 11 Aluminum 61 45 37 37 11 4 Titanium 160 145 154 100 16 6 Inconel 155 100 100 100 31 11 10 3 lb / inch 2 10 6 lb / inch 2 tu ty cy su E G Strain Stress tu = ultimatetensile stress ty = yield tensile stress cy = yield compressive stress su = ultimate shear stress Yield stress Ultimate stress Fracture Proportional limit Inelastic Elastic
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14 MAE 2 Component Weights (lbs) Citation 500 DC-9 L-1011 747 Wing 1,020 11,391 47,401 88,741 Tail 288 2,790 8,570 11,958 Fuselage 1,724 19,712 82,261 116,459 Landing Gear 425 4,182 19,923 32,220 Nacelles 241 1,462 8,916 10,830 Propulsion 1,342 8,350 38,325 45,305 Systems 1,337 7,986 23,618 28,722 Empty Weight 6,377 55,873 229,014 334,235 Takeoff Weight 11,650 108,000 430,000 775,000
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