A comprehensive characterization of a linear deformation sensor for applications in triaxial compression tests

Ekawita, Riska; Khairurrijal, Khairurrijal; Munir, Muhammad Miftahul; Suprijadi,; Nawir, Hasbullah

doi:10.1109/ic3ina.2013.6819172

Cited by 3 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be observed that this relationship was inversely proportional, where a greater deformation of the LDT resulted in a smaller resistance of the strain gauge. This result has been highlighted in a previous study by Ekawita, et al [26].…”

Section: Calibrationsupporting

confidence: 80%

Axial and Lateral Small Strain Measurement of Soils in Compression Test using Local Deformation Transducer

Nawir

Apoji

Ekawita

et al. 2018

J. Eng. Technol. Sci.

Self Cite

View full text Add to dashboard Cite

This paper presents the development of a method using local deformation transducers (LDTs) to locally and sensitively measure small axial and lateral strains in soil in a compression test. A local strain measurement system comprising of axial and lateral LDTs was developed referring to the original LDT system and the cantilever LDT system, respectively. The LDTs were calibrated both in air and under water. Their insensitivity to pressurized water was confirmed. The calibration factors for the axial and lateral LDTs were found to be 1.695 mm/volt and 1.001 mm/volt, respectively. The performance in terms of repeatability and stability of the LDT system was evaluated. The repeatability test showed that the average standard deviation of the lateral LDT was 0.015 volt, while the stability test showed that the average standard error of the axial and lateral LDT were 3.13 × 10-5 volt and 2.65 × 10-5 volt, respectively. Unconfined compression tests were conducted on three reconstituted clay samples to examine the proposed axial and lateral LDT system. The stress-strain relationship indicates a nonlinear relationship between the axial and lateral strain of soil instead of the conventionally assumed constant relationship. The results demonstrate this nonlinear behavior even at small strain levels, which were successfully measured using a domestically built axial and lateral LDT system.

show abstract

Section: Calibrationsupporting

confidence: 80%

Axial and Lateral Small Strain Measurement of Soils in Compression Test using Local Deformation Transducer

Nawir

Apoji

Ekawita

et al. 2018

J. Eng. Technol. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…A UU triaxial emulator was designed to imitate the UU triaxial compression tests using 5 deformation sensors and 1 axial pressure sensor as previously reported [12]. In addition, it was also done to simplify the analysis and storage of measurement data.…”

Section: Emulatormentioning

confidence: 99%

A Simple Unconsolidated Undrained Triaxial Compression Test Emulator

Ekawita

Nawir

Suprijadi

et al. 2015

AMM

Self Cite

View full text Add to dashboard Cite

An unconsolidated undrained (UU) test is one type of triaxial compression tests based on the nature of loading and drainage conditions. In order to imitate the UU triaxial compression tests, a UU triaxial emulator with a graphical user interface (GUI) was developed. It has 5 deformation sensors (4 radial deformations and one vertical deformation) and one axial pressure sensor. In addition, other inputs of the emulator are the cell pressure, the height of sample, and the diameter of sample, which are provided by the user. The emulator also facilitates the analysis and storage of measurement data. Deformation data fed to the emulator were obtained from real measurements [H. Nawir, Viscous effects on yielding characteristics of sand in triaxial compression, Dissertation, Civil Eng. Dept., The University of Tokyo, 2002]. Using the measurement data, the stress vs radial strain, stress vs vertical strain, and Mohr-Coulomb circle curves were obtained and displayed by the emulator.

show abstract

“…The direct method utilizes a transducer/sensor that is direct contact with the object to be measured as well as the LVDT sensor [6], strain gage [1], probe [7] etc. While the indirect method, the sensor is not in contact with the object, for example, image processing technique [8,9], frequency [10,11], satellite [7] and computation technique [5,10].…”

Section: Introductionmentioning

confidence: 99%

The Performance Tested of Multichannel Data Acquisition System In Measurement of Soil Moisture

Manyu¹,

Sainal²,

Ekawita³

et al. 2018

Eighth International Conference on Advances in Applied Science and Environmental Engineering - ASEE 2018

Self Cite

View full text Add to dashboard Cite

Abstract-One of the soil conditions that affect the development of a plant and crop production is the soil moisture. Therefore, it is necessary to monitor this property with multi points and real time of observation around the plant environment. In this research, it had been designed and tested a multichannel soil moisture measurement system with the wireless communication system. The system consists of transmitter and receiver blocks using soil moisture sensors as a soil moisture detector and microcontroller media in both blocks as the overall control of the measurement system. The measured result data is observed directly through the PC display. Laboratory scale testing is done as calibration process of the output voltage from sensor to soil moisture. The soil moisture 14.45 %; 19.92% and 26.73% comparable to 4.71 volt; 4.13 volt and 3.06 volt output voltage respectively. While the resistance values of each humidity were equal to 170.87 kΩ; 49.49 kΩ and 16.36 kΩ. The whole system test is done in the field (oil palm plantation ) with the result obtained that the content of water contented which is pretty much found at the top near the rooting of fibers and the bottom (subsoil).

show abstract

A comprehensive characterization of a linear deformation sensor for applications in triaxial compression tests

Cited by 3 publications

References 16 publications

Axial and Lateral Small Strain Measurement of Soils in Compression Test using Local Deformation Transducer

Axial and Lateral Small Strain Measurement of Soils in Compression Test using Local Deformation Transducer

A Simple Unconsolidated Undrained Triaxial Compression Test Emulator

The Performance Tested of Multichannel Data Acquisition System In Measurement of Soil Moisture

Contact Info

Product

Resources

About