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題 名 | 應力波檢測家具T型構件接合之強度=Detecting the Joint Strength of Furniture T-type Parts by Stress Wave Method |
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作 者 | 陳合進; 陳載永; | 書刊名 | 農林學報 |
卷 期 | 46:4 1997.12[民86.12] |
頁 次 | 頁35-48 |
分類號 | 474.3 |
關鍵詞 | 非破壞測定; 應力波; 引拔強度; 彎矩; Nondestructive test; Stress-wave; Withdrawal strength; Maximal bending moment; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究主要以應力波非破壞性測定法,檢測3種T型接合構件之接合強度,及預測 構件缺點之可行性,並比較其他與傳統破壞性檢測接合強度之相關性。試材加工前後之波速 並沒有明顯的差異,但構件組合後橫檔之波速會變慢;以打音頻譜分析系統檢測構件縱向振 動頻率時,抗彎構件中兩種針葉樹材彎曲接合構件之振動頻率平均比兩種闊葉樹材低約 30% 。4 種樹種的接合構件引拔強度以紅櫟木 (Qrercus spp.) 最大 (1552kgf),美國西部鐵杉 最小 (Tsuga heterophylla Sorg.)(577kgf); 3 種接合法之引拔強度以橢圓榫最大,方榫 次之, 木釘接合最小。 構件彎矩方面以紅櫟木最大 (5115kgf.cm), 巴杜柳桉 (Shorea spp.) (4084 kgf.cm ) 次之,2 針種葉樹材差異不顯著; 3 種接合法中以方榫之彎矩最大 ,橢圓榫次之,而木釘接合最低。構件經非破壞性測定之波速、振動頻率與破壞測定之引拔 強度或彎矩,經簡單直線迴歸分析結果,相關性並不高,到目前為止,可能此兩種非破壞性 檢測方法尚不適用於檢測家具構件之接合強度。 |
英文摘要 | The stress-wave momdestructive test (NDT) method was applies in this research to test the joint strength of T-type joint and try to predict the joint defect. The relationship of joint strength predicted by NDT and tested by traditional destructive method was compared. The vibration frequency tester showed unstable result, therefore this method was excluded in this study. The wave velocity did not have significant difference before and after the T-type parts was processing, but it showed slower velocity after the parts were assembled. While the longitudinal frequency was measured by tap tone analysis system, it was found that the value of softwood was lower than that of hardwood. The withdrawal strength showed that the best was Red oak, and the worst was American hemlock. For joint methods, it showed that the best was oval-end mortise and tenon joint, followed by square-end mortise and tenon joint, and dowel joint. For the bending moment of the T-type parts, the best was Red oak, and the second was Selangan batu with a little difference. Among the joint methods, the best was square-end mortise and tenon joint, the second was oval-end mortise and tenon joint, and the worst was dowel joint. The correlation of withdrawal strength and bending moment measured by destructive test and predicted by NDT was not significant tested by linear regression analysis. |
本系統中英文摘要資訊取自各篇刊載內容。