Fig. 12.49 Reversed bending cyclic crack initiation behavior for (a) HS-110 and (b) HS-130 hot-pressed silicon nitride at 30 Hz for various temperatures. Source: Ref 12. 16 More

Fig. 2 Schematic of R.R. Moore reversed bending fatigue machine. Source: Ref 2 More

Fig. 8.32 Effect of peening, honing, and polishing on the reversed bending fatigue strength of a carburized alloy steel. Source: Ref 35 More

Fig. 8.35 Shot peening improves endurance limits of ground parts. Reversed bending fatigue of flat bars of 45 HRC. Source: Ref 42 More

Fig. 3.25 Fatigue fracture from reversed bending load. In this example, rubbing has obliterated the early stages of fatigue cracking, but ratchet marks are present to indicate locations of crack initiation. The material is 1046 steel with a hardness of approximately 30 HRC. Source: Ref 3.15 More

Fig. 26 Reversed bending fatigue of a 1.6-in.-diam shaft of 1046 steel with a hardness of approximately 30 HRC. Note the symmetrical fatigue pattern of beach marks on each side, with the final rupture on the diameter. This indicates that each side of the shaft was subjected to the same maximum More

Fig. 27 Reversed bending fatigue of an alloy-steel steering knuckle at a hardness level of 30 HRC with nonuniform application of stresses. The multiple-origin fatigue at the bottom was caused by the tendency of normal wheel loading to bend the spindle (lower right) of the knuckle upward More

Fig. 28 Reversed bending fatigue of a flat ¼-in. plate of a high-strength low-alloy steel test specimen, designed with tapered edges to prevent fatigue origin at the corners. Note the many separate origins on each side and the very thin final rupture region separating the two fatigue areas More

Fig. 14.2 Schematic of R.R. Moore reversed-bending fatigue machine. Source: Ref 1 More

Fig. 6.17 Effect of various machining processes on reversed-bending fatigue strength of Ti-5Al-25Sn alloy More

Fig. 16 Effect of cryogenic temperature on reversed bending fatigue ( R = 1) of transverse double-V butt welds in 5083-H113 0.375 in. More

Fig. 9.14 Comparison of rotating-beam (reversed bending, R = –1) fatigue data for two aluminum alloys in various product forms: (a) 2024-T4 and (b) 7075-T6. Source: Ref 9.10 More

Fig. 4-32. A l⅛-in. shaft next to thread relief. Slight reversed bending under rotational load; high stress concentration; very low overstress. More

Fig. 4-33. A 4-in.-diameter keyed shaft. Reversed bending; rotational load; high stress concentration; high over-stress. More

Fig. 4-34. A 5-in.-diameter taper splined shaft. Reversed bending; rotational load; very high stress concentration; high overstress. More

Fig. 11.31 Effect of tensile strength level and processing treatments on reversed bending high-cycle fatigue strength at 10 7 cycles-to-failure of aluminum alloys and steels. Source: Ref 11.37 More

Fig. 11.61 The effect of grinding and peening on reverse-bending fatigue strengths of flat steel bars (hardness 45 HRC, or 421 HB). Source: Ref 11.70 More

Fig. 5 Bolt of a self-service elevator that failed as a result of reverse-bending fatigue. Source: Ref 13 More

Fig. 36 Results of reverse bending fatigue tests showing the effect of surface treatments on fatigue life of welded and nonwelded aluminum alloys Coated Chromate etch primer plus a two-component aluminum-pigmented epoxy top coat Peened Brush shot peened to Almen 6 level Air More