Infrared thermographic evaluation of large composite grid parts subjected to axial loading

V. P. Vavilov, O. N. Budadin, A. A. Kulkov

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Many composite parts, such as laminated panels and grid-like shells, operate under high mechanical loading. Evaluation of their structural integrity is crucial to ensure the long-lasting operation of critical components. Since testing a structure under full or "proof" load might be dangerous for personnel, it would be preferable to use a remote, rapid inspection technique. This paper describes a practical application of IR thermography to the inspection of large composite parts used in the aerospace industry. This work has used just one cycle of increasing load from zero load to failure, and this was done for both for tensile and compressive loads. It is shown that, during the formation of micro-defects in polymeric composites, about 40 % of the total dissipated energy is expended for material heating, while about 60 % is related to material damage accompanied by an increase in the defect concentration. Non-uniform composite deformation causes temperature anomalies, whose amplitude may reach 1.5-2.5 °C at a load of about 50-60 % of the limit load.

Original languageEnglish
Pages (from-to)55-62
Number of pages8
JournalPolymer Testing
Volume41
DOIs
Publication statusPublished - 1 Jan 2015

Fingerprint

Infrared radiation
Composite materials
Inspection
Defects
Aerospace industry
Structural integrity
Load limits
Personnel
Heating
Testing
Temperature

Keywords

  • Composite grid parts
  • Fracture
  • Infrared thermography
  • Nondestructive testing
  • Tensile and compressive loads

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry

Cite this

Infrared thermographic evaluation of large composite grid parts subjected to axial loading. / Vavilov, V. P.; Budadin, O. N.; Kulkov, A. A.

In: Polymer Testing, Vol. 41, 01.01.2015, p. 55-62.

Research output: Contribution to journalArticle

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