Accession Number:

ADA390997

Title:

Structural Health Monitoring: Numerical Damage Predictor for Composite Structures

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

2001-03-01

Pagination or Media Count:

72.0

Abstract:

The use of composite materials in both civil and military applications is increasing as composites potentially offer many advantages over traditional structural materials. Composites typically provide superior strength to weight ratio, better resistance to corrosion, and especially for military applications, greater ballistic protection. Wide use of composites is found in aircraft, armored vehicles, ships and civil structures This present research demonstrates the ability to numerically detect damage in a composite sandwich structure using a robust non-linear finite element model FEM. FEM techniques are used to directly represent damage and the models response is investigated. Changes in elemental strain and strain frequency, through a Fast Fourier Transform FFT, is evaluated. Both a cantilevered beam and a simply supported plate are studied.

Subject Categories:

  • Laminates and Composite Materials
  • Structural Engineering and Building Technology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE