Stress analysis on main landing gear for small aircraft

Main landing gear is important part in aircraft, its help the aircraft to takeoff,landing, and taxing in the ground .This part subject to high stress at landing due toimpact, there are two important force act on landing gear during touch, Normal forceand a spin-up back force .Normal Force is a great force that act on landing gear and itsgenerate due to Normal impact and its cause to bend landing gear to up , this force canbe calculated form Newton second law, and the spin-up back force generated at touchwhen the tire not rotate causing the landing gear leg to bend to backward the value ofthis value can be assumed equals to 0.5 from the normal force. In this study this forcestype are considered to make stress analysis of the landing gear for Cessna 152 duringtouchdown time, after that three model are considered to reduce value of stress on thislanding gear by keeping the dimension and material as on original model and makingpositive curves on the landing gear leg, and shown that when making the positive curvethis will reduce the value of the stress and deflection on the landing gear depending onthe principle of bending moment in the beams.