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題名 | 纖維飽和點以上含水率對萌櫱林與實生林杉木之超音波速及動彈性係數之影響=Effects of Moisture Content above Fiber Saturation Point on Ultrasonic Wave Velocity and Dynamic Elastic Modulus in China-fir Established from Sprouting and Seedling |
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作者 | 林昱廷; 陳勁豪; 王松永; Lin, Li-ting; Chen, Jin-hau; Wang, Song-yung; |
期刊 | 國立臺灣大學農學院實驗林研究報告 |
出版日期 | 20020900 |
卷期 | 16:3=237 2002.09[民91.09] |
頁次 | 頁179-185 |
分類號 | 436.187 |
語文 | chi |
關鍵詞 | 有效密度; 超音波速; 杉木; 含水率; Effective density; Ultrasonic wave velocity; China-fir; Moisture content; |
中文摘要 | 利用超音波法量測實生及萌櫱的杉木在不同含水率的超音波速,並且加以靜曲實驗,以了解超音波速在不同含水率,尤其是纖維飽和點以上跟以下的變化情形及與木材物理性質的關係,並作自由水的運動效率k值校正以推得木材的有效密度peff,得出自由水對超音波傳播速度的影響情形。 |
英文摘要 | The purpose of this study was to use ultrasonic wave method to measure ultrasonic velocity of China-fir under different moisture contents. In addition, the static bending test was conducted to understand the wood properties under various moisture contents, especially that above fiber saturation point. The result can be used to induce the effective density of wood and the impact of the free water on ultrasonic wave velocity |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。