A Study of Large Plastic Deformations in Dual Phase Steel Using Digital Image Correlation and FE Analysis

Tarigopula, V.; Hopperstad, Odd Sture; Langseth, Magnus; Clausen, Arild Holm; Hild, François; Lademo, Odd-Geir; Eriksson, Magnus

doi:10.1007/s11340-007-9066-4

Cited by 97 publications

(47 citation statements)

References 21 publications

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“…The specific difficulty of using DIC for elastomeric materials is the large amplitude of displacements that may prevent a proper determination of the displacement [38][39][40]. To overcome this difficulty, images were acquired at small loading increment (typically for an incremental axial strain of order 2-3 %) and the displacement analysis was partitioned into subseries (the displacement field was computed from time t i to time t j , for t j − t i < 50 images).…”

Section: Dic Principlementioning

confidence: 99%

Volume changes in a filled elastomer studied via digital image correlation

et al. 2012

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. AbstractVolumetric strains in a filled SBR specimen subjected to cyclic uniaxial tension with increasing extensions are studied. Digital image correlation is used to follow the kinematics of two orthogonal free faces. A volume expansion is observed past a critical elongation, which can be interpreted as the onset of cavitation. Under unloading, the volume returns to its original value and remains constant upon reloading. Increasing the elongation to higher values than the previous cycle leads again to a volumetric expansion.

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Section: Dic Principlementioning

confidence: 99%

Volume changes in a filled elastomer studied via digital image correlation

et al. 2012

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“…Despite its accuracy, the application of the microgrid method is limited as a result of technical difficulties associated with the production of sub-micron grids [16]. The DIC technique has been used to overcome the problems associated with the production of grids and has been successfully applied to both macro and micro scales studies as a non-contact method to measure strain distributions in deformed specimens [17][18][19][20][21]. Sun and co-workers [22] developed a procedure with a displacement accuracy of about 1µm to measure the in-plane microscopic deformation of an aluminium alloy during tensile deformation.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Strain Analysis of the Large Deformation at the Scale of Microstructure: Comparison between Digital Image Correlation and Microgrid Techniques

2012

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A comparative study has been carried out to assess the accuracy of the Digital Image Correlation (DIC) technique for the quantification of large strains in the microstructure of a Interstitial Free (IF) steel used in automotive applications. A microgrid technique has been used in this study in order to validate independently the strain measurements obtained with DIC. Microgrids with a pitch of 5 microns were printed on the etched microstructure of the IF steel to measure the local in-plane strain distribution during a tensile test carried out in a Scanning Electron Microscope (SEM). The progressive deformation of the microstructure with microgrids has been recorded throughout the test as a sequence of micrographs and subsequently processed using DIC to quantify the distribution of local strain values. Strain maps obtained with the two techniques have been compared in order to assess the accuracy of the DIC measurements obtained using the natural patterns of the revealed microstructure in the SEM micrographs. Although results obtained with the two techniques are qualitatively similar, therefore demonstrating the reliability of DIC applied to microstructures, even after large deformations in excess of 0.7. However, an average error of about 16% was found in the strain values calculated using DIC.

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“…Method of digital image correlation (DIC) is a modern optical method used frequently for analysis strains on the surface of objects [5], [9]. In the case of classical image correlation the deformations of object are determined by CCD camera.…”

Section: C) Methods Of Digital Image Correlationmentioning

confidence: 99%

Some Possibilities of Determination of Yield Conditions for Cold Rolled Steel Sheets

Šimčák¹,

Berinštet²,

Štamborská³

2010

Acta Mechanica Slov.

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4 monographs, 8 university textbooks, 6 university notebooks and more than 200 publications in journals and conference proceedings at Slovakia and abroad. He has been worked on many grant projects, research tasks and projects for industry. KEY WORDS ABSTRACTRolling of metallic materials results to anisotropy of their mechanical properties during plastic deformation. In the paper are described some possibilities of analytical and experimental determination of conditions for plastic deformation of cold rolled steel sheets. The experimental analysis is realized by biaxial tensile test with application of strain gage and optical methods. The results gained by experimental procedures are compared with yield conditions according to individual theories. INTRODUCTIONClassical semifinished products that are used for production of thin-walled supporting systems are steel sheets. In order to increase competitiveness of steel there were recently provided massive innovations in the area of new qualities of steel sheets. Increasing of loading capacity and decreasing of structural weight is possible by using of steel sheets with smaller thickness made of materials with higher strength properties. Because the thin-walled elements are often produced by cold forming, there is an effort here, beside of reaching higher strength properties, to preserve (or increase) their plastic properties [7]. Identification of beginning of plastic deformation for plane stress state of sheets is important for modeling of cold forming processes as well as for assessment of loading capacity of thin-walled supporting structural elements. The conditions under which the material yields (beginning of plastic deformation) are called initial yield conditions. In case of material hardening during its plastic deformation we call these current yield conditions. Because the cold rolling of steel sheets changes random arrangement of crystals Fratišek Šimčák (SK)

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A Study of Large Plastic Deformations in Dual Phase Steel Using Digital Image Correlation and FE Analysis

Cited by 97 publications

References 21 publications

Volume changes in a filled elastomer studied via digital image correlation

Volume changes in a filled elastomer studied via digital image correlation

Quantitative Strain Analysis of the Large Deformation at the Scale of Microstructure: Comparison between Digital Image Correlation and Microgrid Techniques

Some Possibilities of Determination of Yield Conditions for Cold Rolled Steel Sheets

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