Sub-global equilibrium method for identification of elastic parameters based on digital image correlation results

• Autorzy: Nowak Marcin , Szeptyński Paweł , Musiał Sandra , Maj Michał

Identyfikatory

DOI

10.1007/s43452-024-00979-6

• Języki publikacji: EN

Abstrakty

EN

In this work, a new, simple method is presented, which enables identification of material properties of solids basing on the digital image correlation (DIC) measurements. It may be considered as a simplified alternative of low computational complexity for the well-known finite element model updating (FEMU) method and virtual fields method (VFM). The idea of the introduced sub-global equilibrium (SGE) method is to utilize the fundamental concept and definition of internal forces and its equilibrium with appropriate set of external forces. This makes the method universal for the use in the description of a great variety of continua. The objective function is the measure of imbalance, namely the sum of squares of residua of equilibrium equations of external forces and internal forces determined for finite-sized part of the sample. It is then minimized with the use of the Nelder–Mead downhill simplex algorithm. The efficiency of the proposed SGE method is shown for two types of materials: 310 S austenitic steel and carbon-fiber-reinforced polymer (CFRP). The proposed method was also verified based on FE analysis showing error estimation.

Słowa kluczowe

EN

identification of material constant; digital image correlation; Nelder–Mead downhill simplex algorithm; finite element analysis; optimization; linear elasticity

PL

analiza elementów skończonych; optymalizacja; cyfrowa korelacja obrazu

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2024
• Tom: Vol. 24, no. 3
• Strony: art. no. e169, 2024
• Opis fizyczny: Bibliogr. 35 poz., fot., rys., wykr.

Twórcy

autor

Nowak Marcin

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland

• https://orcid.org/0000-0001-7894-2258

autor

Szeptyński Paweł

• Division of Structural Mechanics and Material Mechanics, Faculty of Civil Engineering, Cracow University of Technology, Kraków, Poland

autor

Musiał Sandra

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland

autor

Maj Michał

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025)