Accession Number:

ADA052674

Title:

Computer Aided Optical Nondestructive Flaw Detection System for Composite Materials.

Descriptive Note:

Final technical rept.,

Corporate Author:

AUBURN UNIV ALA

Report Date:

1977-09-26

Pagination or Media Count:

182.0

Abstract:

This study concerns the nondestructive detection and quantification of flaws and voids in thin, cylindrical, fiber reinforced, composite structures. Three different types of flaws were investigated using double exposure optical holography shearing speckle interferometry and Youngs Fringe methods. The theory for each technique and photographs of the fringe patterns are presented. The fringe density plots were made by manual and computer methods, and the flaw sizes were determined. The displacements and strains were computed. The results show that flaws in their fiber reinforced composite structures can be detected and the size determined either by optical holographic, shearing speckle, or single beam speckle interferometric techniques. A complete nondestructive testing system to detect, locate, size, and quantify flaws in fiber reinforced composite missile launch tubes and motor cases was designed including the hardware and software. The system was assembled, interfaced, checked, and the data from it validated. Complete documentation on the system components are presented or referenced.

Subject Categories:

  • Laminates and Composite Materials
  • Textiles
  • Computer Programming and Software
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE