Accession Number:

ADA193524

Title:

Effect of Fiber Diameter on the Reliability of Composites - Automated Laser Diffraction Implementation

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

• Kunkel, Jeffrey S.

Report Date:

1987-12-01

Pagination or Media Count:

118.0

Abstract:

Composite failures are microscopically sequential and locally redundant. As a result, a composite structure reliability and its strength dependency on geometric size is intimately dependent on the statistics of fiber filament strength. A composite reliability model is needed to utilize such inherent materials redundancy in structural design. This investigation first establishes the important role of fiber diameter measurement in the characterization of fiber filament strength statistics and the composite reliability function, and second, implements the diameter measurement by laser diffraction. This method is automated and lends itself to industrial adoption for materials development, acceptance and quality control. Keywords Stochastic processes.

Descriptors:

• *FIBERS
• *FILAMENTS
• *COMPOSITE STRUCTURES
• *STRUCTURAL ENGINEERING
• SIZES(DIMENSIONS)
• MODELS
• MATERIALS
• STATISTICS
• THESES
• LASERS
• RELIABILITY
• DIFFRACTION
• STRENGTH(GENERAL)
• QUALITY CONTROL
• GEOMETRY
• REDUNDANCY
• AUTOMATION
• STOCHASTIC PROCESSES
• MEASUREMENT
• FUNCTIONS
• DIAMETERS

Subject Categories:

• Refractory Fibers
• Laminates and Composite Materials
• Construction Equipment, Materials and Supplies

Distribution Statement:

APPROVED FOR PUBLIC RELEASE