FUNDAMENTAL STUDY ON SMART STRUCTURE APPROACH TO MARINE STRUCTURE. PART 1, NOVEL METHODS FOR FIBRE-OPTIC MEASUREMENT OF DISPLACEMENT AND DAMAGE

The applicability of a smart structure concept to marine structures is discussed. A fibre-optic sensor has been developed based on the Laser-Doppler effect. The novel method has some advantages for a marine structure, e.g. long gage length, temperature independent output and excellent dynamic response, which are not achieved in conventional interferometric fibre-optic sensors. Deformation of tensile specimens under cyclic load, vibration of cantilever beam specimens were measured with the fibre-optic velocity sensor, and the results were compared with those of strain gauges. The fibre-optic sensor demonstrated a good performance. An Optical Time Domain Relectometer (OTDR) has been applied to detect damage in the specimens. A tensile test of single optical fibre embedded in a resin, tensile and flexure tests of glass fibre reinforced composite specimens were carried out, and the damages of an embedded optical fibre were detected by OTDR. Relations between reflection response with OTDR and applied strain in the resin and composite specimens were examined experimentally, and the effects of materials and stacking sequence of laminates and loading conditions on OTDR response were investigated.

  • Supplemental Notes:
    • J Soc Naval Arch Japan, v 178, Dec 1995, p 583 [9 p, 11 ref, 1 tab, 19 fig]
  • Authors:
    • Kageyama, K
    • Kimpara, I
  • Publication Date: 1995

Language

  • Japanese

Subject/Index Terms

Filing Info

  • Accession Number: 00728314
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Nov 4 1996 12:00AM