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Cheng-Jung Lin, Ming-Jer Tsai, Chia-Ju Lee, Song-Yung Wang, Lang-Dong Lin

Effects of ring characteristics on the compressive strength and dynamic modulus of elasticity of seven softwood species

Keywords: compressive strength, dynamic modulus of elasticity, ring characteristics

The effects of ring characteristics on the compressive strength and dynamic modulus of elasticity of seven softwood species in Taiwan were examined. The results revealed good correlation between compressive strength and dynamic modulus of elasticity obtained using an ultrasonic wave technique (correlation coefficient r=0.77–0.86). Overall, compressive strength increased with decreasing ring width parameters and increasing ring density parameters. Ring density was related to compressive strength, but was not the sole factor affecting the wood strength. According to our statistical analysis, compressive strength was affected by various ring characteristics. Relationships between ring characteristics and compressive strength are influenced by the anatomic direction. Results revealed that earlywood density and minimum density in a ring are equally important variables for evaluating the compressive strength of wood.

Holzforschung, Walter de Gruyter

Print ISSN: 0018-3830
Volume: 61, 06/2007
Pages: 414 - 418

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