Nondestructive Testing Technique To Quantify Deterioration From Marine Borer Attack In Sitka Spruce And Western Hemlock Logs PDF Download
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Author | : Robert Jon Ross |
Publisher | : |
Total Pages | : 8 |
Release | : 2014 |
Genre | : Marine borers |
ISBN | : |
Download Nondestructive Testing Technique to Quantify Deterioration from Marine Borer Attack in Sitka Spruce and Western Hemlock Logs Book in PDF, ePub and Kindle
Stress-wave nondestructive evaluation (NDE) techniques are used widely in the forest products industry--from the grading of wood veneer to inspection of timber structures. Inspection professionals frequently use stress-wave NDE techniques to locate internal voids and decayed or deteriorated areas in large timbers. Although these techniques have proven useful, little information exists concerning the relationship between stress-wave parameters and deterioration observed as a consequence of marine borer attack. In this pilot test, we examined the relationship between stress-wave transmission time and the quality of wood in Sitka spruce and western hemlock logs that had varying degrees of deterioration as a consequence of attack from marine borers. Stress-wave transmission time, perpendicular to grain, was measured at several locations on each log. The logs were then sawn into lumber, which was then visually evaluated. A relationship was observed between stress-wave transmission time and deterioration of the logs and the yield of lumber from the logs.
Author | : Robert Jon Ross |
Publisher | : |
Total Pages | : 8 |
Release | : 2014 |
Genre | : Marine borers |
ISBN | : |
Download Nondestructive Testing Technique to Quantify Deterioration from Marine Borer Attack in Sitka Spruce and Western Hemlock Logs Book in PDF, ePub and Kindle
Stress-wave nondestructive evaluation (NDE) techniques are used widely in the forest products industry--from the grading of wood veneer to inspection of timber structures. Inspection professionals frequently use stress-wave NDE techniques to locate internal voids and decayed or deteriorated areas in large timbers. Although these techniques have proven useful, little information exists concerning the relationship between stress-wave parameters and deterioration observed as a consequence of marine borer attack. In this pilot test, we examined the relationship between stress-wave transmission time and the quality of wood in Sitka spruce and western hemlock logs that had varying degrees of deterioration as a consequence of attack from marine borers. Stress-wave transmission time, perpendicular to grain, was measured at several locations on each log. The logs were then sawn into lumber, which was then visually evaluated. A relationship was observed between stress-wave transmission time and deterioration of the logs and the yield of lumber from the logs.
Author | : |
Publisher | : |
Total Pages | : 70 |
Release | : 2012 |
Genre | : |
ISBN | : |
Download Research Note FPL. Book in PDF, ePub and Kindle
Author | : Robert Jon Ross |
Publisher | : |
Total Pages | : 32 |
Release | : 1991 |
Genre | : Forest products |
ISBN | : |
Download Nondestructive Testing for Assessing Wood Members in Structures Book in PDF, ePub and Kindle
Author | : Joseph Kaiserlik |
Publisher | : |
Total Pages | : 60 |
Release | : 1978 |
Genre | : Wood |
ISBN | : |
Download Nondestructive Testing Methods to Predict Effect of Degradation on Wood Book in PDF, ePub and Kindle
Author | : Keith R. Shea |
Publisher | : |
Total Pages | : 12 |
Release | : 1960 |
Genre | : |
ISBN | : |
Download Decay in Logging Scars in Western Hemlock and Sitka Spruce Book in PDF, ePub and Kindle
Author | : C. A. Keeney |
Publisher | : |
Total Pages | : 68 |
Release | : 1984 |
Genre | : Tomography |
ISBN | : |
Download Evaluation of Nondestructive Underwater Timber Inspection Techniques Book in PDF, ePub and Kindle
Author | : Kristin C. Schad |
Publisher | : |
Total Pages | : 16 |
Release | : 1996 |
Genre | : Nondestructive testing |
ISBN | : |
Download Nondestructive Methods for Detecting Defects in Softwood Logs Book in PDF, ePub and Kindle
Wood degradation and defects, such as voids and knots, affect the quality and processing time of lumber. The ability to detect internal defects in the log can save mills time and processing costs. In this study, we investigated three nondestructive evaluation techniques for detecting internal wood defects. Sound wave transmission, x-ray computed tomography, and impulse radar were used to examine white spruce and balsam fir logs. Computed tomography resulted in the highest resolution for voids, knots, and high moisture content areas, but at a very high price. Both sound wave transmission and impulse radar were able to detect large voids and areas of degradation, and these techniques showed some sensitivity to very knotty logs. None of the methods was able to detect small pockets of decay. The use of radar requires an experienced operator because of the difficulty of interpreting the data.
Author | : Michael James Chapman |
Publisher | : |
Total Pages | : |
Release | : 2001 |
Genre | : |
ISBN | : |
Download Experimental Determination of In-situ Serviceability of Sitka Spruce Timber by Ultrasonic Non-destructive Testing Book in PDF, ePub and Kindle
Author | : J. D. Bletchly |
Publisher | : |
Total Pages | : 96 |
Release | : 1967 |
Genre | : Insect pests |
ISBN | : |
Download Insect and Marine Borer Damage to Timber and Woodwork Book in PDF, ePub and Kindle