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Data acquisition and control for multiple composite life tests

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Author
Emery, James W.
Date
1988-06
Advisor
Wu, Edward M.
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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.
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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.
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http://hdl.handle.net/10945/23001
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  • 1. Thesis and Dissertation Collection, all items

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    An investigation of initial yield surfaces for unidirectional reinforced composites. 

    Ericson, Walter Alfred. (Monterey, California. Naval Postgraduate School, 1972-03);
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    ORIENTATION DEPENDENT MECHANICAL PROPERTIES OF 3D PRINTED POLYMER MATRIX COMPOSITES 

    Hodgkins, Charles L. (Monterey, CA; Naval Postgraduate School, 2021-06);
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    Failure site location by acoustic emission for composites reliability assurance 

    Gish, Donald A. (Monterey, California. Naval Postgraduate School, 1995-09);
    The failure of fiber filaments in a composite subjected to load produces a stress wave which can be detected using acoustic emission techniques. The spatial clustering of multiple fiber failure sites is known to cause ...
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