Inverse problems with the digital image correlation: approach and applications
A viable approach to solve inverse problems in elasticity is proposed. It is based on regression algorithms to estimate materials and/or loading parameters by fitting the experimentally-evaluated displacement field to representative analytical solutions. Displacements are measured by the digital...
Guardado en:
| Autores principales: | , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Gruppo Italiano Frattura
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/4f029ece237340738073bcad73db1447 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| id |
oai:doaj.org-article:4f029ece237340738073bcad73db1447 |
|---|---|
| record_format |
dspace |
| spelling |
oai:doaj.org-article:4f029ece237340738073bcad73db14472021-11-26T10:55:44ZInverse problems with the digital image correlation: approach and applications1971-8993https://doaj.org/article/4f029ece237340738073bcad73db14472021-06-01T00:00:00Zhttps://www.fracturae.com/index.php/fis/article/view/3129https://doaj.org/toc/1971-8993 A viable approach to solve inverse problems in elasticity is proposed. It is based on regression algorithms to estimate materials and/or loading parameters by fitting the experimentally-evaluated displacement field to representative analytical solutions. Displacements are measured by the digital image correlation (DIC) technique and they are used as input for numerical procedures able to minimize the estimation errors of the unknowns and to quantify the unavoidable rigid body motions of the samples/components. In addition, thanks to ad-hoc developed iterative algorithms, non-linear phenomena related to high and localized stress/strain states, can be captured successfully. This latter represents a relevant novelty of the methodology as it allows to investigate plasticity-induced mechanisms in solid mechanics which are impossible to analyze with more traditional DIC-based approaches. Three different case studies are considered: 1) estimation of the stress intensity factor in fracture mechanics problems, 2) estimation of the elastic properties of a material by the Brazilian tests, 3) estimation of the contact pressure generated by thermally activated shape memory alloy (SMA) rings used for pipe coupling. The reliability and the accuracy of the method is demonstrated through systematic comparisons of the results with conventional techniques in experimental mechanics. Emanuele SgambitterraFabrizio NiccoliGruppo Italiano FratturaarticleDigital image correlationOver-deterministic methodFracture MechanicsBrazilian diskPipe couplingMechanical engineering and machineryTJ1-1570Structural engineering (General)TA630-695ENFrattura ed Integrità Strutturale, Vol 15, Iss 57 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Digital image correlation Over-deterministic method Fracture Mechanics Brazilian disk Pipe coupling Mechanical engineering and machinery TJ1-1570 Structural engineering (General) TA630-695 |
| spellingShingle |
Digital image correlation Over-deterministic method Fracture Mechanics Brazilian disk Pipe coupling Mechanical engineering and machinery TJ1-1570 Structural engineering (General) TA630-695 Emanuele Sgambitterra Fabrizio Niccoli Inverse problems with the digital image correlation: approach and applications |
| description |
A viable approach to solve inverse problems in elasticity is proposed. It is based on regression algorithms to estimate materials and/or loading parameters by fitting the experimentally-evaluated displacement field to representative analytical solutions.
Displacements are measured by the digital image correlation (DIC) technique and they are used as input for numerical procedures able to minimize the estimation errors of the unknowns and to quantify the unavoidable rigid body motions of the samples/components. In addition, thanks to ad-hoc developed iterative algorithms, non-linear phenomena related to high and localized stress/strain states, can be captured successfully. This latter represents a relevant novelty of the methodology as it allows to investigate plasticity-induced mechanisms in solid mechanics which are impossible to analyze with more traditional DIC-based approaches.
Three different case studies are considered: 1) estimation of the stress intensity factor in fracture mechanics problems, 2) estimation of the elastic properties of a material by the Brazilian tests, 3) estimation of the contact pressure generated by thermally activated shape memory alloy (SMA) rings used for pipe coupling.
The reliability and the accuracy of the method is demonstrated through systematic comparisons of the results with conventional techniques in experimental mechanics.
|
| format |
article |
| author |
Emanuele Sgambitterra Fabrizio Niccoli |
| author_facet |
Emanuele Sgambitterra Fabrizio Niccoli |
| author_sort |
Emanuele Sgambitterra |
| title |
Inverse problems with the digital image correlation: approach and applications |
| title_short |
Inverse problems with the digital image correlation: approach and applications |
| title_full |
Inverse problems with the digital image correlation: approach and applications |
| title_fullStr |
Inverse problems with the digital image correlation: approach and applications |
| title_full_unstemmed |
Inverse problems with the digital image correlation: approach and applications |
| title_sort |
inverse problems with the digital image correlation: approach and applications |
| publisher |
Gruppo Italiano Frattura |
| publishDate |
2021 |
| url |
https://doaj.org/article/4f029ece237340738073bcad73db1447 |
| work_keys_str_mv |
AT emanuelesgambitterra inverseproblemswiththedigitalimagecorrelationapproachandapplications AT fabrizioniccoli inverseproblemswiththedigitalimagecorrelationapproachandapplications |
| _version_ |
1718409594554810368 |