対称4点曲げと非対称4点曲げによる木材のヤング率とせん断弾性係数の測定

吉原 浩, 吉延 匡弘, 丸田 誠

doi:10.2472/jsms.69.429

対称4点曲げと非対称4点曲げによる木材のヤング率とせん断弾性係数の測定

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吉原浩

島根大学総合理工学部
吉延匡弘

島根大学総合理工学部
丸田誠

静岡理工科大学理工学部

書誌事項

タイトル別名

Determination of the Young’s Modulus and Shear Modulus of Solid Wood by the Symmetric and Asymmetric Four-Point Bending Tests
タイショウ 4テンマゲトヒタイショウ 4テンマゲニヨルモクザイノヤングリツトセンダンダンセイケイスウノソクテイ

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抄録

<p>The Young’s modulus and shear modulus of solid wood (Sitka spruce) in the longitudinal-radial (LR) and longitudinal-tangential (LT) planes were obtained from the symmetric four-point bending and asymmetric four-point bending tests under various span/depth ratios. Independently from the bending tests, the Young’s modulus and shear modulus were measured from the tension and Iosipescu shear tests, respectively, and the validity of the bending tests was examined by comparing the results of these various tests. The Young’s modulus and shear modulus could be determined accurately when using both the four-point testing data obtained in the appropriate range of span/depth ratios, which was approximately from 25 to 30.</p>