Flat specimen shape recognition based on full-field optical measurements and registration using mapping error minimization method

Maček, Andraž (author), Urevc, Janez (author), Halilovič, Miroslav (author)

In the paper, an alignment methodology of finite element and full-field measurement data of planar specimens is presented. The alignment procedure represents an essential part of modern material response characterisation using heterogeneous strain-field specimens. The methodology addresses both the specimen recognition from a measurement`s image and the alignment procedure and is designed to be applied on a single measurement system. This is essential for its practical application because both processes, shape recognition and alignment, must be performed only after the specimen is fully prepared for the digital image correlation (DIC) measurements (white background and black speckles) and placed into a testing machine. The specimen can be observed with a single camera or with a multicamera system. The robustness of the alignment method is presented on a treatment of a specimen with a metamaterial-like structure and compared with the well-known iterative closest point (ICP) algorithm. The performance of the methodology is also demonstrated on a real DIC application.

• Language: English
• Keywords: full-field measurements, digital image correlation, specimen shape recognition, surface registration, iterative closest point
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: Str. 203-213, SI 29
• Numbering: Vol. 67, no. 5
• PID: 20.500.12556/RUL-160891-bb0ca5c8-fac0-581c-319b-08adcbafae11
• UDC: 539.37:004.932(045)
• ISSN on article: 0039-2480
• DOI: 10.5545/sv-jme.2021.7111
• COBISS.SI-ID: 65014787
• Publication date in RUL: 05.09.2024

Record is a part of a journal

• Title: Strojniški vestnik
• Shortened title: Stroj. vestn.
• Publisher: Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
• ISSN: 0039-2480
• COBISS.SI-ID: 762116

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Title: Prepoznava oblike planih preizkušancev z uporabo optičnih metod merjenja celotnih polj deformacij in poravnava oblike z uporabo minimizacije odstopanja preslikave
• Keywords: meritve polja deformacij, korelacija digitalnih slik, prepoznava oblike preizkušanca, poravnava oblik, inverzna identifikacija, heterogeno polje deformacij

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0263
• Name: Mehanika v tehniki