期刊
WOOD MATERIAL SCIENCE & ENGINEERING
卷 17, 期 6, 页码 937-953出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17480272.2021.1978107
关键词
Mounting system of displacement transducer; mechanical test of timber samples; LVDT for timber test; photogrammetry method
资金
- Royal Academy of Engineering-Visiting Professor [VP2021\7\12]
- Royal Academy of Engineering-Industrial Fellowship [IF\192023]
- Scottish Funding Council-Innovation Voucher: Bamboo-Timber Composite Materials for Structural Use, National Nature Science Foundation of China [51768008]
- British Council, China
- UK-China-BRI Countries Education Partnership Initiative
- Lawrence Ho Research fund
- China Postdoctoral Science Foundation [2017M613273XB]
- Nature Science Foundation of Guangxi Zhuang Autonomous Region [2019JJA160137]
- Liuzhou Scientific Research and Technology Development Plan [2017BC40202]
- Ministry of Education, China
The mounting system of LVDT has a significant impact on mechanical property tests of timber materials. It should be carefully designed and validated before the actual test. The displacement distribution is not uniform across the timber sample, which should be considered when selecting mounting points for LVDTs.
This paper presents a unique study to reveal the effect of the mounting system of the linear variable differential transformer (LVDT) on the mechanical property tests of timber materials. This effect has been overlooked in the past but proven to be significant enough that will distort the measurements completely if the displacement is relatively small. The reason for causing this error is because the LVDT is not directly measuring targeting points on a sample, instead, the LVDT is measuring the distance between one point on the stop-end (where the tip rested on) and the holder. The wrong common sense hopes that this point on the stop-end and holder reliably following the movement of the sample points. But this study reveals that it is not always the case with the aid from the photogrammetry method. The messages of this paper are simple but alertly useful and, important: (1) the mounting system and the method of installation of the LVDTs have a significant impact on the actual displacement measurement in a mechanical properties test of timber materials. It should be carefully designed and validated before the actual test; (2) the displacement distribution is not uniform across the timber sample. This should be taken into account when selecting the mounting points of the LVDTs. Testing standards should consider this effect when recommending displacement transducers to be used in a timber-related test.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据