Accession Number : ADA176835


Title :   Composite Service Life Prediction via Fiber Bundle Testing. Evaluation of Testing Equipment and Data Acquisition System


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Petridis, Dimitrios M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a176835.pdf


Report Date : Dec 1986


Pagination or Media Count : 179


Abstract : The objective of this thesis is to investigate the problem of the safe service life prediction of graphite composite structures such as pressure vessels used in the pilot ejection seats, rocket motor cases and space shuttle energy storage compartments. The basic data required for life prediction is the stress-rupture life, i.e., the composite life under constant load and it has to be recognized that extensive testing over long periods of time is required to produce statistically meaningful data. The contribution of this investigation is focused on identifying the characterization methodology for efficient data generation (to minimize cost and time), the appropriate theoretical models for correlation of the data (to translate data to applications) and in evaluating the limitations of the available testing (lower bound response speed) and data acquisition equipment (upper bound recording rate) thereby enhancing future experimental planning and testing. Keywords: Fiber, filament, Weibull model, response speed.


Descriptors :   *COMPOSITE MATERIALS , *COMPOSITE STRUCTURES , *DATA ACQUISITION , *EJECTION SEATS , *GRAPHITED MATERIALS , *LIFE EXPECTANCY(SERVICE LIFE) , *PRESSURE VESSELS , *ROCKET ENGINE CASES , *WEIBULL DENSITY FUNCTIONS , BUNDLES , CORRELATION , DATA PROCESSING EQUIPMENT , FIBER OPTICS , LONG RANGE(TIME) , LOW VELOCITY , MODELS , PILOT SEATS , RECORDING SYSTEMS , RESPONSE , TEST METHODS


Subject Categories : Laminates and Composite Materials


Distribution Statement : APPROVED FOR PUBLIC RELEASE