Grain effect on the accuracy of defect detection in wood structure by using acoustic-laser technique

Qiwen Qiu; Denvid Lau

doi:10.1117/12.2514285

1 April 2019 Grain effect on the accuracy of defect detection in wood structure by using acoustic-laser technique

Qiwen Qiu, Denvid Lau

Proceedings Volume 10971, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIII; 109710X (2019) https://doi.org/10.1117/12.2514285
Event: SPIE Smart Structures + Nondestructive Evaluation, 2019, Denver, Colorado, United States

Abstract

Wood structures have been recently considered as one of the important building styles due to their green use of natural resource, low energy consumption, and less waste emission. But wood structures are vulnerable to near surface material deterioration over long duration, as the result of mechanical impact, chemical corrosion and fungi attack. In order to maintain such natural structure in designed mechanical performance, it is necessary to detect the near surface wood defect with non-destructive evaluation (NDE) methods on a regular basis. Among the existing NDE methods, acoustic-laser technique has been demonstrated for detecting near surface detect in a variety of structures. When using this technique in wood structure detection, the measurement accuracy may be affected by the wood grain. Taking into account this issue, the present research work aims to understand the wood grain on the dynamic behavior of near surface layer in wood structure under acoustic excitation and assess the grain effect on the defect detection via acoustic-laser technique. In this study, artificial defects are fabricated in two wood beams, with the transverse and parallel directions to the grain respectively. Vibration characteristics measured by acoustic-laser technique for the two grain cases are compared and discussed. This paper also provides the suggestions of practical application of the technique in detecting wood structure in considering the grain effect.

Citation Download Citation

Qiwen Qiu and Denvid Lau "Grain effect on the accuracy of defect detection in wood structure by using acoustic-laser technique", Proc. SPIE 10971, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIII, 109710X (1 April 2019); https://doi.org/10.1117/12.2514285

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available