Treesearch
Ultrasound Transmission Times in Biologically Deteriorated Wood
| Authors: | Christopher Adam Senalik, Robert J. Ross, Rodney DeGroot |
| Year: | 2015 |
| Type: | Paper |
| Station: | Forest Products Laboratory |
| Source: | In: Proceedings: 19th International Nondestructive Testing and Evaluation of Wood Symposium. 14 p. |
Download (PDF 377 KB): https://research.fs.usda.gov/download/treesearch/51025.pdf
Abstract
The use of a variety of stress wave transmission techniques for the in-service condition assessment of deteriorated wood is well documented. This paper summarizes results from an extensive study designed to examine the relationship between ultrasound transmission times and the deterioration of exposed wood. Two hundred seventy (270) southern pine lumber specimens were evaluated nondestructively using a through transmission ultrasound technique after field exposure for periods of up to fifty seven (57) months. Ultrasound transmission times increased with exposure time. Several statistical models of the relationship between transmission time and length of exposure were developed and are presented.