Abstract

Pulsed holographic interferometry was used to examine the mechanical properties of paper and corrugated board. For determinations using bending wave propagation, the wave was generated by the impact of a small pendulum. The wave propagation pattern and the disturbances of the pattern were analyzed to detect anisotropy principal directions, and local variations and defects in paper and corrugated board. Experiments show that the local dynamic behavior of the corrugated board is different from what can be expected based on static tests. It is also possible to identify mechanical defects. A box of corrugated board received impact, and the wave propagation was visualized. The support of interconnecting sides of the box acts like a pinned joint.

Keywords

ANISOTROPY; CHEMICAL ANALYSIS; CHEMICAL TESTS; CROSS DIRECTION; HOLOGRAPHY; INTERFEROMETRY; MACHINE DIRECTION; MEASUREMENT; OPTICAL MEASUREMENT; PAPER; VARIATIONS

Published in

Tappi Journal
1992, volume: 75, number: 10, pages: 86-93
Publisher: TECH ASSN PULP PAPER IND INC

Authors' information