Recommendations on Use of DIC in Experimental Geotechnics

IF 1.3 4区工程技术 Q3 ENGINEERING, GEOLOGICAL

Geotechnical Testing Journal Pub Date : 2023-11-02 DOI:10.1520/gtj20220119

Kritesh Chouhan, Harsh Rai, Jitesh T. Chavda

引用次数: 0

Abstract

Image-based deformation measurement techniques, like digital image correlation (DIC), are used to measure the displacement of soil particles and thereby to investigate the behavior of geo-structure in experimental geotechnics. The precision of the measurement from the DIC technique depends on the position of the camera and light panels, the color temperature of light, size of the region of interest (RoI), type and relative density of sand, seeding ratio, type of camera, and strain rate used in experiments. In the paper, the effect of above-mentioned parameters is investigated experimentally in 1-g model tests. The studies show that the precision in DIC measurements is dependent on the position of camera and light panels, size of RoI, texture of the sand, and seeding ratio. However, the relative density of sand and strain rate do not significantly affect the results from the DIC analysis. The efficacy in the measurement of the large deformations and suitability of smartphone cameras using DIC are also addressed. Last, we developed recommendations to obtain precise results from DIC in experimental geotechnics.

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关于在试验岩土工程中使用DIC的建议

基于图像的变形测量技术，如数字图像相关(DIC)，用于测量土颗粒的位移，从而研究实验岩土工程中的土工结构行为。DIC技术的测量精度取决于相机和光板的位置、光的色温、感兴趣区域(RoI)的大小、沙子的类型和相对密度、播种比、相机的类型和实验中使用的应变率。本文在1g模型试验中对上述参数的影响进行了实验研究。研究表明，DIC测量的精度取决于相机和光板的位置、RoI的大小、沙子的纹理和播种率。然而，砂的相对密度和应变速率对DIC分析结果没有显著影响。还讨论了DIC在测量大变形中的有效性和智能手机相机的适用性。最后，我们提出了在试验岩土工程中获得精确的DIC结果的建议。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geotechnical Testing Journal 工程技术-地球科学综合

CiteScore

3.10

自引率

12.50%

发文量

审稿时长

3.6 months

期刊介绍： The purpose of the Geotechnical Testing Journal is (1) to provide a high-quality publication that informs the profession of new developments in soil and rock testing and related fields; (2) to provide a forum for the exchange of information, particularly that which leads to the development of new test procedures; and (3) to stimulate active participation of the profession in the work of ASTM International Committee D18 on Soil and Rock and related information. The editorial scope of this journal covers test methods for soil and rock, sampling, nomenclature, and practices relating to the determination of properties and behavior of soil and rock for engineering purposes, and for soil as a medium for plant growth.