Evaluation of modulus of elasticity for dimension lumber by three nondestructive techniques

JIANG Jing-hui; Lü Jian-xiong; REN Hai-qing; LUO Xiu-qin; LONG Chao; GUO Wei

Volume 25 Issue 3

Jun. 2018

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Article Navigation > Journal of Zhejiang A&F University > 2008 > 25(3): 277-281

JIANG Jing-hui, Lü Jian-xiong, REN Hai-qing, LUO Xiu-qin, LONG Chao, GUO Wei. Evaluation of modulus of elasticity for dimension lumber by three nondestructive techniques[J]. Journal of Zhejiang A&F University, 2008, 25(3): 277-281.

Citation:

JIANG Jing-hui, Lü Jian-xiong, REN Hai-qing, LUO Xiu-qin, LONG Chao, GUO Wei. Evaluation of modulus of elasticity for dimension lumber by three nondestructive techniques[J]. Journal of Zhejiang A&F University, 2008, 25(3): 277-281.

Evaluation of modulus of elasticity for dimension lumber by three nondestructive techniques

1.
Key Laboratory of Wood Science and Technology of State Forestry Administration, Research Institute of Wood Industry, The Chinese Academy of Forestry, Beijing 100091, China

Received Date: 2007-05-10
Rev Recd Date: 2007-06-26
Publish Date: 2008-06-10

Abstract

Dynamic bending modulus of elasticity of Mongolia scotch pine(Pinus sylvestris var. mongolica) full dimension lumber(38 mm×89 mm×4 000 mm) and Chinese fir (Cunninghamia lanceolata) plantation dimension lumber (45 mm×90 mm×2 500 mm) were tested by three non-destructive techniques, i.e. transverse vibration method, longitudinal fundamental frequency vibration method and ultrasonic wave method. At the same time, the static modulus elasticity of the above specimens were tested according to ASTM D198-99. The results showed that the value of dynamic and static modulus of elasticity followed the sequence as the following, Eusw > Efr > Etru > Etv, the relationship between dynamic and static modulus of elasticity concerning the three methods was significant at 0.01 level, indicating that all the three nondestructive methods could be used to predict the bending properties of dimension lumber. Furthermore, considering the operation of the equipment, longitudinal fundamental frequency vibration technique was the most accurate, convenient, reliable, easy and practical method. It was also found that the coefficient of determination(R2) obtained by using the three nondestructive techniques for Chinese fir plantation full dimension lumber was lower than that of Mongolia scotch pine full dimension lumber, estimating the static modulus elasticity of Mongolia scotch pine was more accurate than that of plantation Chinese fir.
- forest engineering,
- transverse vibration,
- longitudinal fundamental frequency vibration,
- ultrasonic wave,
- modulus of elasticity,
- dimension lumber

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Evaluation of modulus of elasticity for dimension lumber by three nondestructive techniques

1. Key Laboratory of Wood Science and Technology of State Forestry Administration, Research Institute of Wood Industry, The Chinese Academy of Forestry, Beijing 100091, China

Received Date: 2007-05-10

Rev Recd Date: 2007-06-26

Publish Date: 2008-06-10

Key words:

forest engineering /
transverse vibration /
longitudinal fundamental frequency vibration /
ultrasonic wave /
modulus of elasticity /
dimension lumber

Abstract: Dynamic bending modulus of elasticity of Mongolia scotch pine(Pinus sylvestris var. mongolica) full dimension lumber(38 mm×89 mm×4 000 mm) and Chinese fir (Cunninghamia lanceolata) plantation dimension lumber (45 mm×90 mm×2 500 mm) were tested by three non-destructive techniques, i.e. transverse vibration method, longitudinal fundamental frequency vibration method and ultrasonic wave method. At the same time, the static modulus elasticity of the above specimens were tested according to ASTM D198-99. The results showed that the value of dynamic and static modulus of elasticity followed the sequence as the following, Eusw > Efr > Etru > Etv, the relationship between dynamic and static modulus of elasticity concerning the three methods was significant at 0.01 level, indicating that all the three nondestructive methods could be used to predict the bending properties of dimension lumber. Furthermore, considering the operation of the equipment, longitudinal fundamental frequency vibration technique was the most accurate, convenient, reliable, easy and practical method. It was also found that the coefficient of determination(R2) obtained by using the three nondestructive techniques for Chinese fir plantation full dimension lumber was lower than that of Mongolia scotch pine full dimension lumber, estimating the static modulus elasticity of Mongolia scotch pine was more accurate than that of plantation Chinese fir.

Evaluation of modulus of elasticity for dimension lumber by three nondestructive techniques

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Related

Proportional views