Search Results

There has been a flurry of actlvity lately to revlse the specifications that control the processlnq of parts subject to fatigue and corrosion fatigue failures. Our aginq Commercial, Mllitary and Civll airplane fleets, coupled wlth the costs of replacement, have caused great pressures to extend component operating life. Stress cycling of both englne and airframe hardware often is sufficient to cause fatigue damage. Shot peening has been proven to increase the ability of these parts to withstand significant increases in stress cycling. Other factors (corrosion, fretting and foreign object damage, to name a few) cause stress concentrations which are often initiation points for fatigue damage. Shot peening is used to encapsulate those stress concentrations in layers of residual compression thereby offsetting the conditions for fatigue damage.