Measurement of local relative displacements in large structures

Angelo Tesauro, Martin Alexander Eder, Magda Nielsen

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Abstract

This paper presents a novel measurement technique to measure local relative displacements between parts of large-scale structures. The measured deformations can be of significant importance for fracture analyses in many different types of structures in general, and for adhesive connections in particular. The measurement of small local relative displacements in structures subjected to large global deformations is complex and hardly feasible with conventional measurement methods. Therefore, a Small Displacement Measurement System (SDMS) has been devised. The SDMS is based on stereo photogrammetry and capable of measuring 3D local displacements with a high degree of accuracy. In this article, the technique is used to measure local deformations in the vicinity of the adhesive trailing edge joint of a wind turbine rotor blade. The SDMS results correspond well with another independent measurement method.
Original languageEnglish
JournalJournal of Strain Analysis for Engineering Design
Volume49
Issue number5
Pages (from-to)301-314
ISSN0309-3247
DOIs
Publication statusPublished - 2014

Keywords

  • Small displacement measurement system
  • Stereo photogrammetry
  • Local relative displacement
  • Trailing edge
  • Wind turbine blade

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