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Fatigue strength reduction factor

Example 2.21 A rod of plastic is subjected to a steady axial pull of 50 N and superimposed on this is an alternating axial load of 100 N. If the fatigue limit for the material is 13 MN/m and the creep rupture strength at the equivalent time is 40 MN/m, estimate a suitable diameter for the rod. Thermal effects may be ignored and a fatigue strength reduction factor of 1.5 with a safety factor of 2.5 should be used. [Pg.144]

So applying the fatigue strength reduction factor and the factor of safety... [Pg.145]

Kf = Fatigue strength reduction factor Kgjc = Fatigue penalty factor ASpjc = Effective equivalent stress range... [Pg.22]

The effect of temperature on the notch effect of the weldment is shown in Fig. 15. In this figure the fatigue strength reduction factor is shown as a function of cycle life for both bead-on and bead-off conditions for the two test temperatures, 75 and -300 F. (This ratio assumes the plate to be the unnotched condition and the bead-on, bead-off to be the notched condition.) The factor/if ... [Pg.601]

Fig. 15. Fatigue strength reduction factor, Iff, butt welded 5083-H113 3/8 In. — plate at... Fig. 15. Fatigue strength reduction factor, Iff, butt welded 5083-H113 3/8 In. — plate at...
The fatigue evaluation procedure is outlined in Chapter 8 in which it was mentioned how the alternating stress intensity is calculated for the general multiaxial stress state in a pressure vessel component. In addition, the effects of the so-called local structural discontinuities must be evaluated using stress concentration factors determined from theoretical, numerical or numerical techniques. These are referred to as the fatigue strength reduction factors, which generally should not exceed a value of 5. [Pg.167]

Cummings, H.N., Stulen, F.B., Schulte, W.C. Tentative fatigue strength reduction factors for silicate-type inclusions in high-strength steels. Proc. ASTM. 58, 505 (1958)... [Pg.189]

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