| Issue |
E3S Web Conf.
Volume 187, 2020
The 13th Thai Society of Agricultural Engineering International Conference (TSAE 2020)
|
|
|---|---|---|
| Article Number | 06003 | |
| Number of page(s) | 8 | |
| Section | Soil and Water Engineering | |
| DOI | https://doi.org/10.1051/e3sconf/202018706003 | |
| Published online | 08 September 2020 | |
Design of horizontal shear strain instrument for co-estimation of soil stress-strain
King Mongkut’s Institute of Technology Ladkrabang, Prince of Chumphon, Department of Engineering, Chumphon, Thailand
* Corresponding author: dithaporn.th@kmitl.ac.th
This study aimed to design and fabricate the horizontal shear strain transducer (HST) for measuring the soil strain under the agricultural machinery traffic by using a rotary potentiometer which was an angular strain change detector. The angular movable mechanism was calibrated and evaluated the characteristics of the instrument in the laboratory, and found that the non-linearity and the hysteresis were 4.56 and 4.42%, respectively. Furthermore, the strain measurement device was buried in the field to compare the shear strain at varying tractor velocities (5, 6.5 and 8 km/h). For all vehicle speed at the first passage, the shear strain and soil bulk density obviously increased, whereas the final moisture content decreased; as a result, the lower velocity caused higher shear strain.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.