Data acquisition and control for multiple composite life tests
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Authors
Emery, James W.
Subjects
life test
stress rupture
bundle testing
composite material
stress rupture
bundle testing
composite material
Advisors
Wu, Edward M.
Date of Issue
1988-06
Date
June 1988
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Strength durability of composite materials has many current Navy applications including rocket motor cases, pressure vessel for submarine flasks, energy storage for space applications and for pilot ejection seats. The primary effect of composite aging can be characterized by the fiber filament life under constant stress (stress rupture). This thesis develops experimental facilities for parallel testing of fiber filaments in the form of a bundle. A fast data acquisition system records the filaments breakage during load application. The filaments within a bundle sample are maintained at a constant strain level which is automatically adjusted for creep by digital feedback signal from the load of a control sample. A slow speed data acquisition system records filament breakage during long elapse time (days to years). This thesis establishes a nationally unique capability at the Naval Postgraduate School to quantitatively characterize the reliability of composite material.
Type
Thesis
Description
Series/Report No
Department
Aeronautics and Astronautics
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.