Abstract

Propagating bending waves are studied in three different composite tubes by holographic interferometry. A conical mirror is placed axially inside the tubes. Axial illumination and observation directions make it possible to view the circumference of the tube, with a high sensitivity to radial deformation. It is shown how the deformation field can be numerically evaluated using a phase stepping and unwrapping technique. Transient bending waves in the tubes are both generated and recorded by the same pulsed laser, which makes the experiments easy to perform. Finite element simulations of the impacted tubes are compared to corresponding experiments. Both the geometry and the material properties of the tubes affect the wave propagation. For unidirectional composite tubes, the 0-deg and 90-deg directions have different dynamic behavior. The proposed method could be used in nondestructive testing of tubes.

Published in

Experimental Mechanics
1996, Volume: 36, number: 3, pages: 224-231
Publisher: SOC EXPERIMENTAL MECHANICS

SLU Authors

• Olofsson, Kenneth

  • Swedish Pulp and Paper Research Institute (STFI)

UKÄ Subject classification

Applied Mechanics


Publication Identifiers

DOI: https://doi.org/10.1007/BF02318011

Permanent link to this page (URI)

https://res.slu.se/id/publ/52714