2026-03-16T00:30:09Z https://it-hiroshima.repo.nii.ac.jp/oai

oai:it-hiroshima.repo.nii.ac.jp:00000754 2023-07-25T10:40:47Z 1:18:377

打撃音法を用いた木材の弾性係数の非破壊検査測定精度の調査 Investigation of Nondestructive Measuring Accuracy of the Elastic Modulus of Timbers Using the Tapping-Tone Method 川上, 和貴 カワカミ, カズキ 岩井, 哲 イワイ, サトシ Kawakami, Kazuki Iwai, Satoshi 501.32 tapping-tone method nondestructive test elastic modulus timber application/pdf In this study, the estimation accuracy of the elastic modulus of timbers by a tapping-tone method used as a nondestructive test was examined against the real elastic modulus by the destructive test, changing section size, specimen length and kind of the timbers named Douglas fir, Chamaecyparis obtusa and Cryptomeria japonica. The elastic modulus were measured by two different types of tapping-tone method: the longitudinal vibration method and the transverse vibration method. The conclusions are as follows: it is found that the transverse vibration method predicts remarkably well the elastic modulus by the destructive test, regardless of the section size and the length of the specimen. On the other hand, the longitudinal vibration method to the small-size specimen (specimen with 480 mm length) shows, in certain cases, wrong estimation against the elastic modulus of the destructive test. 広島工業大学 2008-02-01 jpn departmental bulletin paper VoR https://it-hiroshima.repo.nii.ac.jp/records/754 http://ci.nii.ac.jp/naid/40015883265/ http://ci.nii.ac.jp/naid/40015883265/ AA11599110 13469975 広島工業大学紀要. 研究編 42 199 206 https://it-hiroshima.repo.nii.ac.jp/record/754/files/library_research42_199.pdf application/pdf 847.4 kB 2023-03-30