Full-Field Indentation Damage Measurement Using Digital Image Correlation
| Autor: | Francisco Díaz-Garrido, Elías López-Alba |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Digital image correlation
Materials science 02 engineering and technology Bending Deformation (meteorology) Plasticity lcsh:Technology Article law.invention 0203 mechanical engineering law contact indentation damage 3D digital image correlation Indentation General Materials Science lcsh:Microscopy lcsh:QC120-168.85 Bearing (mechanical) lcsh:QH201-278.5 lcsh:T business.industry Structural engineering 021001 nanoscience & nanotechnology Symmetry (physics) 020303 mechanical engineering & transports lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology Contact area business lcsh:TK1-9971 |
| Zdroj: | Materials; Volume 10; Issue 7; Pages: 774 Materials, Vol 10, Iss 7, p 774 (2017) Materials |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma10070774 |
| Popis: | A novel approach based on full-field indentation measurements to characterize and quantify the effect of contact in thin plates is presented. The proposed method has been employed to evaluate the indentation damage generated in the presence of bending deformation, resulting from the contact between a thin plate and a rigid sphere. For this purpose, the 3D Digital Image Correlation (3D-DIC) technique has been adopted to quantify the out of plane displacements at the back face of the plate. Tests were conducted using aluminum thin plates and a rigid bearing sphere to evaluate the influence of the thickness and the material behavior during contact. Information provided by the 3D-DIC technique has been employed to perform an indirect measurement of the contact area during the loading and unloading path of the test. A symmetrical distribution in the contact damage region due to the symmetry of the indenter was always observed. In the case of aluminum plates, the presence of a high level of plasticity caused shearing deformation as the load increased. Results show the full-field contact damage area for different plates’ thicknesses at different loads. The contact damage region was bigger when the thickness of the specimen increased, and therefore, bending deformation was reduced. With the proposed approach, the elastic recovery at the contact location was quantified during the unloading, as well as the remaining permanent indentation damage after releasing the load. Results show the information obtained by full-field measurements at the contact location during the test, which implies a substantial improvement compared with pointwise techniques. |
| Databáze: | OpenAIRE |
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