Acoustic emission analysis of industrial plywood materials exposed to destructive tensile load
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Date
2014-05
Publication Type
Journal Article
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yes
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Abstract
Several plywood materials made from spruce wood and, for comparison, solid spruce wood were investigated focusing on the sub-macroscopic damage evolution during tensile loading of the specimens. The destructive tests were simultaneously monitored by the acoustic emission (AE) method and strain field deformation measurement using digital image correlation (DIC). The bilinear interpretation of exponential defect growth identified the start of significant nonlinear behavior at 70 % of ultimate strength for all plywood materials. However, already the preceding and more stable damage evolution at lower stress levels has indicated a variation in intensity of the source mechanisms evaluated by AE energy of the detected events. Additional information on the formation of strain field concentration, which correlates with discrete accumulation in AE events and increased spreading in the distribution of AE energy, reveals the complexity of pre-damage due to the variation in cracks’ magnitude and timescales involved. The correlation between ultimate tensile strength and damage accumulation below 70 % of ultimate strength is determined, as well as the influence of layered structures on damage size shown by the percentage distribution of AE energy.
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Publication status
published
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Book title
Journal / series
Volume
48 (3)
Pages / Article No.
611 - 631
Publisher
Springer
Event
Edition / version
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Software
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Date collected
Date created
Subject
Acoustic emission; Digital image correlation; Acoustic emission signal; Acoustic emission event; Solid wood
Organisational unit
08759 - Niemz, Peter (Tit.-Prof.)
Notes
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.