In general, this of the following methods yields the most conservative fatigue strength proof (a) saderberg method (b)-goodman method (c)-gerber line (d)-the asme elliptic curve.

a). Soderberg method

Explanation:

A straight line joining the endurance limit, on the ordinate and to the yield strength,  on the abscissa is know as Soderberg line.

   The Soderberg line is the most conservative failure criteria and in this there is no need to consider yielding point in this case.

The equation for Soderberg is given by

where is mean stress

            is amplitude stress

oil flow is a highly convective flow compared to water flow at normal temperature and pressure.

answer:

d. attempt to find the owner, then leave your information if you cannot find them.

explanation:

d. represents both (b) and (c).

more logical as well.

b and c are to complicated.

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