Fatigue monitoring of 70-30 copper-nickel.
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Authors
Lash, Franklin Bruce
Subjects
fatigue
70-30 copper-nickel
S/N fatigue life gage
70-30 copper-nickel
S/N fatigue life gage
Advisors
Brock, John E.
Date of Issue
1970-06
Date
June 1970
Publisher
Monterey, California ; Naval Postgraduate School
Language
en_US
Abstract
Recent tests by G. L. Rowe indicated the possibility of
monitoring fatigue damage of 70-30 copper-nickel by use of a
commercial fatigue life gage. The work reported herein, however,
which includes tests at cyclic strain levels considerably
higher and lower than those used by Rowe , suggests that much
more study and development will be required before in-service
monitoring will be useful or reliable. Fatigue failure,
using initial surface crack formation as a criterion, takes
place at low cyclic strain levels with appreciably smaller
gage indication than does failure at medium or high cyclic
strain levels. It is further noted that ability to detect
surface cracks depends greatly upon the expertise of the
observer so that a less subjective criterion of failure should
be developed.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funding
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.