Young’s modulus in the longitudinal direction was measured by a longitudinal vibration (LV) test on western hemlock specimens with various length/width ratios. The effects of the configuration and orthotropy of the specimen on the measurement of Young’s modulus was investigated through subsequent finite element (FE) calculations. The experimental results suggested that Young’s modulus could not be obtained accurately when the length/width ratio of the specimen was in a certain range. The FE calculations revealed that Young’s modulus in the transverse direction and Poisson’s ratio in the length-width plane, as well as the length/width ratio, affected the Young’s modulus value. However, the results showed that when the length/width ratio of the specimen was larger than 10, Young’s modulus could be measured accurately with the LV test with a reduction in the effect of orthotropy.

中文翻译：

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试样配置和正交性对通过纵向振动测试获得的实木杨氏模量的影响

通过纵向振动（LV）测试，对具有不同长/宽比的西方铁杉样本进行纵向杨氏模量测量。通过随后的有限元（FE）计算，研究了样品的构型和正交性对杨氏模量测量的影响。实验结果表明，当试样的长宽比在一定范围内时，无法准确获得杨氏模量。有限元计算表明，横向的杨氏模量和长-宽平面中的泊松比以及长/宽比都影响了杨氏模量值。但是，结果表明，当样品的长宽比大于10时，