ESDU 75016:2013

ESDU 75016 shows graphically data taken from a wide range of
sources in the literature for the endurance under axial load at
various constant amplitude stress levels. Cruciform and cover plate
load carrying and non-load carrying joints are considered. The
fatigue strength of full penetration cruciform joints is
established and, using these curves as a base, the reduction in
fatigue strength due to inadequate weld leg length or penetration
is shown for all joint types. Also shown is the effect on failure
location of weld leg length and penetration. These data were all
for zero mean stress; however, for two materials in each case, data
show the effect of mean stress on fatigue strength of both load
carrying cruciform and non-load carrying cover plate joints. In the
former case, the effect of weld penetration is also considered on
both fatigue strength and location of failure. The various factors
affecting the fatigue strength are discussed.