Stresses in Bonded Repair to Cylindrically Curved Shell Structures

Abstract

Adhesive bonding bas been used to join or repair metallic and composite structural components to achieve or restore their designated structural stiffness and strengths. However, current analysis methods and empirical databases for composite bonded joint design and for composite bonded patch repair are limited to flat plate and/or flat laminate geometries, and the effect of curvature on the performance and durability of composite bonded joints and repairs is not known. This report presents a novel finite element formulation for developing adhesive elements for conducting 2.5-D quick stress analysis of bonded repairs to curved structures. Both large deflections of the parent structures and nonlinear adhesive behavior are incorporated in the formulation. An in-house software called BPATCH has been developed. A variety of examples are presented to illustrate the effect of curvature, large deflection and adhesive nonlinear behavior on stresses in adhesive layer. Illustrative examples also indicate the effect of patch location, i.e., internal and external patches, patch size and patch thickness.

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Document Details

Document Type
Technical Report
Publication Date
Aug 18, 2000
Accession Number
ADA381105

Entities

People

  • Liyong Tong
  • Xiannian Sun

Organizations

  • University of Sydney

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Adhesives
  • Boundaries
  • Climate Change
  • Composite Materials
  • Coordinate Systems
  • Curvature
  • Finite Element Analysis
  • Geometry
  • Internal Pressure
  • Materials
  • Modulus Of Elasticity
  • Shape
  • Stress Analysis
  • Stress Strain Relations
  • Stresses
  • Thickness
  • Three Dimensional

Readers

  • Structural Dynamics.
  • Structural Health Monitoring of Composite Structures.