RT Journal Article
T1 Evaluation of a low-cost approach to 2-D digital image correlation vs. a commercial stereo-DIC system in Brazilian testing of soil specimens
A1 Arza García, Marcos
A1 Núñez Temes, Carlos
A1 Lorenzana Fernández, José Antonio
A1 Ortiz Sanz, Juan
A1 Castro Ponte, Alberte
A1 Portela Barral, María
A1 Gil Docampo, María de la Luz
A1 Bastos Costas, Guillermo
K1 DIC
K1 Brazilian tensile strength
K1 Stereo vision
K1 GOM
K1 Camera calibration
K1 Full-feld measurements
AB Due to their cost, high-end commercial 3D-DIC (digital image correlation) systems are still inaccessible for many laboratories or small factories interested in lab testing materials. These professional systems can provide reliable and rapid full-field measurements that are essential in some laboratory tests with high-strain rate events or high dynamic loading. However, in many stress-controlled experiments, such as the Brazilian tensile strength (BTS) test of compacted soils, samples are usually large and fail within a timeframe of several minutes. In those cases, alternative low-cost methods could be successfully used instead of commercial systems. This paper proposes a methodology to apply 2D-DIC techniques using consumer-grade cameras and the open-source image processing software DICe (Sandia National Lab) for monitoring the standardized BTS test. Unlike most previous studies that theoretically estimate systematic errors or use local measures from strain gauges for accuracy assessment, we propose a contrast methodology with independent full-field measures. The displacement fields obtained with the low-cost system are benchmarked with the professional stereo-DIC system Aramis-3D (GOM GmbH) in four BTS experiments using compacted soil specimens. Both approaches proved to be valid tools for obtaining full-field measurements and showing the sequence of crack initiation, propagation and termination in the BTS, constituting reliable alternatives to traditional strain gauges. Mean deviations obtained between the low-cost 2D-DIC approach and Aramis-3D in measuring in-plane components were 0.08 mm in the perpendicular direction of loading (ΔX) and 0.06 mm in the loading direction (ΔY). The proposed low-cost approach implies considerable savings compared to commercial systems
PB Springer
YR 2022
FD 2022
LK http://hdl.handle.net/10347/28864
UL http://hdl.handle.net/10347/28864
LA eng
NO Archives of Civil and Mechanical Engineering 22, 4 (2022). https://doi.org/10.1007/s43452-021-00325-0
NO Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This work was supported by the Strategic Researcher Cluster BioReDeS funded by the Regional Government Xunta de Galicia under the project Ref. ED431E 2018/09, by the Xunta de Galicia under the grant “Financial aid for the consolidation and structure of competitive units of investigation in the universities of the University Galician System (2020-22)” Ref. ED341B 2020/25 and by the Spanish Research Agency (AEI) in the frame of the programme Juan de la Cierva–Formación (Dr. Bastos) Ref. FJC2019-039743-I/AEI/10.13039/501100011033
DS Minerva
RD 22 abr 2026