Journal article Open Access

An optical method for rapid examination of check development in decorative plywood panels

Burnard, Michael David; Muzynski, Lech; Leavengood, Scott; Ganio, Lisa


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    "doi": "10.1007/s00107-018-1327-7", 
    "description": "<p>Common methods for assessment of surface checking in decorative plywood panels rely on manual handling and visual inspection of specimens, a laborious procedure practically limiting the number of materials and variables that may be considered within one project. In this study, a new automated optical method for detection and measurement of checks has been developed. This method was based on the digital image correlation principle, which allowed identification of checks as small as 0.2&nbsp;mm wide and 1&nbsp;mm long. Continuous measurement allowed reliable check counts, and measurement of check dimensions as they develop during exposure to drying conditions. A check severity index has been proposed. The method has been validated in exposure tests conducted in harsh but realistic conditions, to increase the likelihood of checking and reduce the test duration to 4&nbsp;h. In addition, an innovative test setup allowed near simultaneous monitoring of check development in up to 48 panel specimens sized 30&thinsp;&times;&thinsp;30&nbsp;cm. The efficiency of the method allows studies to examine an unprecedented number of treatments and replicates.</p>", 
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    "title": "An optical method for rapid examination of check development in decorative plywood panels", 
    "language": "eng", 
    "journal": {
      "title": "European Journal of Wood and Wood Products"
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        "title": "Renewable materials and healthy environments research and innovation centre of excellence", 
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    "keywords": [
      "Digital Image Correlation, optical methods, crack assessment, maple, veneer, plywood"
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    "publication_date": "2018-06-15", 
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        "orcid": "0000-0001-9357-0819", 
        "affiliation": "InnoRenew CoE & University of Primorska, Andrej Maru\u0161i\u010d Institute", 
        "name": "Burnard, Michael David"
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        "affiliation": "Oregon State University, College of Forestry, Department of Wood Science and Engineering", 
        "name": "Muzynski, Lech"
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        "orcid": "0000-0002-2938-2220", 
        "affiliation": "Oregon State University, College of Forestry, Department of Wood Science and Engineering", 
        "name": "Leavengood, Scott"
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        "affiliation": "Oregon State University, College of Forestry, Department of Forest Ecosystems and Society", 
        "name": "Ganio, Lisa"
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