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A simply-supported beam has a circular cross section with a diameter of 25.0mm , and length of 400mm . The center of the beam contains
A simply-supported beam has a circular cross section with a diameter of
25.0mm
, and length of
400mm
. The center of the beam contains a weld that fatigues with a Basquin's law given by
\\\\sigma _(ar)N_(f)^(0.14)=800MPa
. The weld has a yield stress of
200MPa
and a tensile strength of
400MPa
.\ a) If a fully-reversed point load of amplitude
4.0kN
is applied
100mm
from one end of the beam, what is the life-time of the weld?\ cycles
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