Model
Digital Document
Publisher
Florida Atlantic University
Description
Reverse bend, uniform stress beam specimens of ABS DH-32
steel were subjected to fatigue cycles of randomly generated
amplitude in a sea water environment to determine the effect
of narrow band spectrum loading on cycles to failure. The
loading spectrum was the C/12/20 spectrum, developed at the
National Engineering Laboratory in Scotland to simulate the
severe conditions of the North Sea. Some misinformation
which has been published by NEL and other& regarding ~he
C/12/20 spectrum is addressed. A number ot means for
presenting random amplitude cycles to failure data in the
form of an SN plot are discussed. A means for taking into
account fatigue test cycling rate in failure predictions is
proposed, and the results of the freely corroding specimens
of this investigation conform to the proposed technique.
The random amplitude specimens exhibited reduced fatigue
lives compared with similar specimens of an earlier constant
amplitude investigation.
steel were subjected to fatigue cycles of randomly generated
amplitude in a sea water environment to determine the effect
of narrow band spectrum loading on cycles to failure. The
loading spectrum was the C/12/20 spectrum, developed at the
National Engineering Laboratory in Scotland to simulate the
severe conditions of the North Sea. Some misinformation
which has been published by NEL and other& regarding ~he
C/12/20 spectrum is addressed. A number ot means for
presenting random amplitude cycles to failure data in the
form of an SN plot are discussed. A means for taking into
account fatigue test cycling rate in failure predictions is
proposed, and the results of the freely corroding specimens
of this investigation conform to the proposed technique.
The random amplitude specimens exhibited reduced fatigue
lives compared with similar specimens of an earlier constant
amplitude investigation.
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