This is used in conjunction with the Goodman and Gerber lines when yielding is a criterion of failure. Yield A line from yield strength on the y-axis to yield strength on the x-axis. ![]() Any point to the left of both the Gerber line and the yield line is the safe region. Gerber A parabolic line from fatigue limit on the y-axis to ultimate strength on the x-axis. Any point to the left of both the Goodman line and the yield line is the safe region. Goodman A line from fatigue limit on the y-axis to the ultimate strength on the x-axis. Any point to the left of the line is the safe region. ![]() ![]() Soderberg A line from fatigue limit on the y-axis to the yield strength on the x-axis. Each failure criterion is drawn according to:
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