The influence of load level on the damages and strength properties of finger-jointed lumber
| Project/Area Number |
24580253
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Wood science
|
|---|
| Research Institution | Forestry and Forest Products Research Institute |
|---|
Principal Investigator |
HIRAMATSU YASUSHI 独立行政法人森林総合研究所, 複合材料研究領域, 室長 (80353829)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
UKYO Seiichiro 独立行政法人森林総合研究所, 構造利用研究領域, 主任研究員 (70455260)
MIYATAKE Atsushi 独立行政法人森林総合研究所, 複合材料研究領域, チーム長 (20353873)
|
|---|
| Project Period (FY) |
2012-04-01 – 2015-03-31
|
| Project Status |
Completed (Fiscal Year 2014)
|
| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
|
|---|
| Keywords | フィンガージョイント / たて継ぎ / アコースティックエミッション / AE / デジタル画像相関法 / 集成材 / ラミナ / 保証荷重 |
|---|
| Outline of Final Research Achievements |
In order to investigate the influence of load on the strength properties of finger-jointed (FJ) sugi (Cryptomeria japonica) lumber, monotonic and cyclic tensile loading tests were conducted. In the tests, simultaneous observation of acoustic emission (AE) and two-dimensional strain distribution were conducted. Location of AE was monitored using 1-dimensional source localization technique. AEs were mainly at FJs, and total events of AE increased as the load increased. It was considered that damages were occurred in the FJ and progressed with the increase of load. The tensile strength of monotonic loading tests and cyclic loading tests showed little difference. So, it was considered that the damages of FJ lumber by applying cyclic load had no effect on the tensile strength.
|
Report
(4 results)
Research Products
(3 results)
