An investigation of residual stresses in simulated wing panels of 7075-T6 aluminum.

The advent of onboard aircraft microprocessor fatigue monitoring systems will establish the opportunity to fully exploit residual stresses at stress-critical areas, including their effects on fatigue predictions. An experimental investigation was undertaken to more fully understand them by making photoelastic measurements of residual stresses at notches in simulated wing panels of 7075-T6 aluminum and to establish the relationships between the local stresses, residual stresses, and the far-field or applied stress. The stress concentration factors were found to decrease with increased plastic deformation while the strain concentration factors were found to remain constant. The residual stress levels were found to be immutable despite changes in fatigue loading conditions, notch geometry, or test duration.

Department dc:contributor.department

Aeronautics

Grantor dc:publisher

Monterey, California. Naval Postgraduate School

Year dc:date.issued

1979

Author dc:creator

• Engle, Edward C.

Advisor dc:contributor.advisor

• Lindsey, G. H.

Statement dc: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.

Language dc:language.iso

en_US

Handle dc:identifier.uri

https://hdl.handle.net/10945/18772

OAI identifier oai:identifier

oai:calhoun.nps.edu:10945/18772