|
Abstract
|
|
|---|---|
| After the success achieved by using non-destructive methods in previous research projects, to estimate physical and mechanical aging of particle and fiberboards, the study of the relationships between aging, physical and mechanical changes, and nondestructive measures on particle boards with an exterior fiber coating (Superpan), are proposed in this paper. A total number of 96 pieces of Superpan were tested to analyze its real physical and mechanical properties, and the same properties estimated using non-destructive methods (screw withdrawal and ultrasonic and stress wave velocity), during a physical laboratory aging test. Measurements of the propagation wave velocity with the sensors in parallel, end to end, and forming an angle of 45 degrees, with both sensors in the face of the board, in order to contrast different layers, have been recorded. After the results of statistical analysis, it can be concluded that there is a strong relationship between the non-destructive measurements carried out, and the decline in physical and mechanical properties of the panels due to aging. It has been also found that the Superpan ages better than standard particle board, and similarly or even better than the standard fibreboard. Authors propose several models to estimate board¿s physical and mechanical properties and aging degree, with coefficients of determination R2 over 0.9. The best results are obtained with the stress wave method (R2= 0.98), although ultrasonic method results are highly representative as well (R2= 0.97). | |
|
International
|
Si |
|
Congress
|
18th International Nondestructive Testing and Evaluation of Wood Symposium |
|
|
960 |
|
Place
|
Madison, Wisconsin, EEUU |
|
Reviewers
|
Si |
|
ISBN/ISSN
|
00-0000-000-0 |
|
|
|
|
Start Date
|
24/09/2013 |
|
End Date
|
27/09/2013 |
|
From page
|
710 |
|
To page
|
710 |
|
|
Proceedings 18th International Nondestructive Testing and Evaluation of Wood Symposium. General Technical Report FPL-GTR-226. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory |