Page 431 - Mechanical Behavior of Materials
P. 431

432                     Chapter 9  Fatigue of Materials: Introduction and Stress-Based Approach
































            Figure 9.10 Loads for one flight of a fixed-wing aircraft (a), and a simplified version of this
            loading (b). Working loads occur due to takeoffs, maneuvers, and landings, and there are
            vibratory loads due to runway roughness and air turbulence, as well as wind gust loads
            in storms. (From [Waisman 59]; used with permission.)





















            Figure 9.11 Rotating cantilever beam fatigue testing machine used by W¨ohler. D,drive
            pulley; C, arbor; T, tapered specimen butt; S, specimen; a, moment arm; G, loading bearing;
            P, loading spring. (From [Hartmann 59]; used with permission.)
   426   427   428   429   430   431   432   433   434   435   436