声-超声技术评价兴安落叶松规格材的抗弯性质

doi:10.11707/j.1001-7488.20141013

Abstract

Abstract:

Acousto-ultrasonic(AU)technology was used to evaluate bending properties of air-dried dimension lumber of Chinese larch(Larix gmelinii). Some AU parameters including wave velocity, peak voltage, time -centroid and frequency-centroid were measured. The air-dried density and bending properties of static modulus of elasticity(MOE)and modulus of rupture(MOR)were also measured. The relationships between AU parameters and density and MOE, MOR were analyzed and the prediction regression equations of bending properties based on AU parameters and air-dried density were built. The results showed that the relationships between all the AU parameters and air-dried density and MOE, as well as the relationships between peak voltage, frequency-centroid and air-dried density and MOR were significant at 0.01 level. Better regression results for MOE and MOR prediction can be achieved with air-dried density, peak voltage and wave velocity as independent variables with r²=0.83 and r²=0.66 respectively, compared with traditional ultrasonic technique with dynamic modulus of elasticity(DMOE)as independent variable with r²=0.80 and r²=0.34 respectively. The study indicated that acousto-ultrasonic technology can be used to predict the bending mechanical properties of larch dimension lumber better than ultrasonic wave technology especially modulus of rupture.

Key words: Chinese larch(Larix gmelinii), acousto-ultrasonic(AU) parameters, air-dried density, dynamic modulus of elasticity, bending modulus of elasticity, bending modulus of rupture

CLC Number:

S781

Zhang Xunya, Jiang Xiaomei, Lü Bin, Yin Yafang. Evaluation of Bending Properties of Larch Dimension Lumber with Acousto-Ultrasonic Technique[J]. Scientia Silvae Sinicae, 2014, 50(10): 94-98.

References

艾春安,刘瑜,蔡堃. 2009. 固体火箭发动机壳体/绝热层界面缺陷的声-超声检测.固体火箭技术,32(1):114-118.
(Ai C A, Liu Y, Cai K. 2009. Acousto-ultrasonic detection for interface defect between case and insulation of SRM. Journal of Solid Rocket Technology,32(1):114-118. [in Chinese] )
车飞,彭伟. 2007. 薄板声-超声检测信号的时频分析研究.南昌航空大学学报,21(3): 36-40.
(Che F, Peng W. 2007. Study on time-frequency analysis for acousto-ultrasonic testing signal in thin plates. Journal of Nanchang Hang Kong University: Natural Science,21(3): 36-40. [in Chinese] )
邓明晰.2005. 复合结构界面粘接强度的声-超声评价研究.应用声学,24(5): 292-299.
(Deng M X. 2005. Nondestructive evaluation of adhesive strength of composite structures using an acousto-ultrasonic approach. Applied Acoustics,24(5): 292-299. [in Chinese] )
嵇伟兵,马灵飞. 2006. 利用超声波检测杉木抗弯弹性模量.浙江林业科技,26(3): 21-24.
(Ji W B, Ma L F. 2006. Study on modulus of elasticity in static bending of Cunninghamia lanceolata by ultrasonic. Journal of Zhejiang Forestry Science and Technology,26(3): 21-24. [in Chinese] )
林兰英,傅峰. 2007. 三种无损检测方法预测四种桉树木材弹性模量的对比研究.木材加工机械,(3):24-29.
(Lin L Y, Fu F. 2007. Comparative study of MOE on three methods of nondestructive test forecasting four kinds of lumber. Wood Processing Machinery,(3):24-29. [in Chinese] )
宁志威,孙良新.2001. 声-超声技术在碳-碳复合材料薄板损伤检测中的应用. 振动、测试与诊断,21(1): 15-20.
(Ning Z W, Sun L X. 2001. Application of acousto-ultrasonic technique to damage detection of carbon-carbon composite thin plate. Journal of Vibration,Measurement & Diagnosis,21(1): 15-20. [in Chinese] )
张训亚,殷亚方,姜笑梅. 2010a.两种无损检测方法评估人工林杉木抗弯性质. 建筑材料学报,13(6): 836-840.
(Zhang X Y, Yin Y F, Jiang X M. 2010a. Evaluation of bending properties of Chinese fir plantation by two nondestructive testing methods. Journal of Building Materials,13(6): 836-840. [in Chinese] )
张训亚,殷亚方,罗彬. 2010b. 超声波预测落叶松规格材的抗弯性能. 木材工业,24(3): 1-3.
(Zhang X Y, Yin Y F, Luo B. 2010b. Predicting bending performance of larch dimensional lumber by an ultrasonic technique. China Wood Industry,24(3): 1-3. [in Chinese] )
Ilic J. 2001. Relationship among the dynamic and dtatic elastic properties of air-dry Eucalyptus delegatensis R. Baker. European Journal of Wood and Wood Products, 59(3): 169-175.
Kawamoto S, Kiguchi M, Kataoka Y, et al. 2010. Propagation of acoustic emission and acousto-ultrasonic waves in wood materials. EWGAE 2010 Vienna, 8th to 10th September.
Kawamoto S, William S. 2002. Acoustic emission and acousto-ultrasonic techniques for wood and wood-based composites: a review. US Department of Agriculture, Forest Service, Forest Products Laboratory.
Liu Z Q, Huang R. 2000. Experimental analysis of acousto-ultrasonic wave propagation mode in thin plate.Chinese Journal of Acoustics, 19(3): 277-284.
Oliveira F G R, Campos J A O, Sales A. 2002. Ultrasonic measurements in Brazilian hardwood. Materials Reasearch, 5(1): 51-55.
Romer J. 2013. Predicting mechanical properties of southern pine lumber with nondestructive measurements. State University of New York, Master Thesis.
Saadat-Nia M, Brancheriau L, Gallet P, et al. 2011. Ultrasonic wave parameter changes during propagation through poplar and spruce reaction wood. BioResources, 6(2): 1172-1185.
Sandoz J, Benoit Y, Demay L. 2000. Wood testing using acousto-ultrasonic. Proceedings of the 12th International Symposium on Nondestructive Testing of Wood, Sopron, Hungary,97-104.

[1]	Yu Huaqiang;Fei Benhua;Ren Haiqing;Jiang Zehui;Liu Xing'e. Variation in Tensile Properties and Relationship between Tensile Properties and Air-Dried Density for Moso Bamboo [J]. Scientia Silvae Sinicae, 2006, 42(03): 72-76.
[2]	Liu Zhenbo;Liu Yixing;Yu Haipeng;Yuan Junqi. Research on the Dynamic Modulus of Elasticity Measurement of Lumber [J]. Scientia Silvae Sinicae, 2005, 41(6): 126-131.

Evaluation of Bending Properties of Larch Dimension Lumber with Acousto-Ultrasonic Technique

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 2

Recommended Articles

Metrics

Comments