Ultrasound to estimate the physical-mechanical properties of tropical wood species grown in an agroforestry system

Author:

Mascarenhas Adriano Reis Prazeres1ORCID,Melo Rafael Rodolfo de2ORCID,Santos Pimenta Alexandre3ORCID,Stangerlin Diego Martins4ORCID,Corrêa Fernando Luiz de Oliveira5ORCID,Sccoti Marta Silvana Volpato1ORCID,Paula Edgley Alves de Oliveira6ORCID

Affiliation:

1. Department of Forest Engineering , Federal University of Rondônia – UNIR , Av. Norte Sul , Nova Morada , Rolim de Moura , RO , CEP 76940-000 , Brazil

2. Agricultural Sciences Center , Federal University of the Semiarid – UFERSA , Av. Francisco Mota, 572 , Costa e Silva , Mossoró , RN , CEP 59625-900 , Brazil

3. Forest Engineering Department , Agricultural Sciences Academic Unit, Federal University of Rio Grande do Norte – UFRN , RN-160, Km 03, District of Jundiaí , Macaíba , RN , CEP 59280-000 , Brazil

4. Institute of Agricultural and Environmental Sciences, Federal University of Mato Grosso – UFMT , Av. Alexandre Ferronato, Industrial Sector , Sinop , MT , CEP 78557-267 , Brazil

5. Office for Development of the Cocoa Region of the State of Rondônia, Executive Commission for the Cocoa Crop Plan – CEPLAC , BR – 364, km 325 , Ouro Preto do Oeste , RO , CEP 35400-000 , Brazil

6. Graduate Program in Materials Science and Engineering , Federal University of the Semiarid – UFERSA , Av. Francisco Mota, 572, Costa e Silva , Mossoró , RN , CEP 59625-900 , Brazil

Abstract

Abstract The great diversity of tropical wood species makes it difficult to obtain information about their technological properties. The present work employed ultrasound to estimate the physical and mechanical properties of four wood species: African mahogany (Khaya senegalensis), ‘freijó’ (Cordia goeldiana), ‘paricá’ (Schizolobium amazonicum), and teak (Tectona grandis). Nineteen-year-old adult trees were selected and harvested from an agroforestry system (AFS) located in the Brazilian Amazon. From the harvested trees, 1.5 m logs were sawn and test specimens were obtained for physical-mechanical assays. The ultrasound propagation speed (V 0) and the dynamic modulus of elasticity (E d ) were obtained from applying ultrasound longitudinally in wood samples. Values of V 0 decreased from the lightest wood (paricá) to the heaviest (African mahogany), and E d presented the opposite behavior. For the physical properties, the coefficient of determination (R 2) ranged from 12 to 35% and the best linear regression models were fitted for the basic density, having V 0 and E d as independent variables. For the mechanical properties, the values of R 2 varied from 18 to 63% and higher correlations were found between parallel-to-grain compression strength and E d , and rigidity, static bending and Ed. Ultrasound presented the potential to estimate the properties of tropical wood species from the ASF.

Publisher

Walter de Gruyter GmbH

Subject

Biomaterials

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3