Topic
Digital image correlation
About: Digital image correlation is a research topic. Over the lifetime, 7842 publications have been published within this topic receiving 132166 citations.
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TL;DR: A high-efficiency and high-accuracy measurement strategy for 3D-DIC is proposed in the end using the inverse compositional Gauss–Newton algorithm with the second-order shape function.
191 citations
15 Oct 2011-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the deformation behavior of a lattice structure produced by selective laser melting (SLM) on the local scale by means of a comprehensive experimental in situ approach, including electron backscatter diffraction, scanning electron microscopy and digital image correlation SLM-processed as well as heat treated lattice structures made from TiAl6V4 alloy.
Abstract: Cellular materials are promising candidates for load adapted light-weight structures Direct manufacturing (DM) tools are effective methods to produce non-stochastic structures Many DM studies currently focus on optimization of the geometric nature of the structures obtained The literature available so far reports on the mechanical properties but local deformation mechanisms are not taken into account In order to fill this gap, the current study addresses the deformation behavior of a lattice structure produced by selective laser melting (SLM) on the local scale by means of a comprehensive experimental in situ approach, including electron backscatter diffraction, scanning electron microscopy and digital image correlation SLM-processed as well as heat treated lattice structures made from TiAl6V4 alloy were employed for mechanical testing It is demonstrated that the current approach provides means to understand the microstructure-mechanical property–local deformation relationship to allow for optimization of load adapted lattice structures
190 citations
TL;DR: A multiscale approach to determine the displacement field by digital image correlation is proposed to increase the robustness, accuracy, and reliability of the image-matching algorithm.
Abstract: We propose a multiscale approach to determine the displacement field by digital image correlation. The displacement field is first estimated on a coarse resolution image and progressively finer details are introduced in the analysis as the displacement is more and more securely and accurately determined. Such a scheme has been developed to increase the robustness, accuracy, and reliability of the image-matching algorithm. The procedure is used on two different types of examples. The first one deals with a representative image that is deformed precisely and purposefully to assess the intrinsic performances. In particular, the maximum measurable strain is determined. The second case deals with a series of pictures taken during compression experiments on mineral-wool samples. The different steps of the procedure are analyzed and their respective role is assessed. Both reflection and transmission images are tested.
189 citations
TL;DR: In this article, the effect of plastic anisotropy on the fracture modeling of aluminum alloy 6061-T 6 sheets has been investigated, and it was found that the sheets exhibited little planar anisotropic but substantial out-of-plane anishotropy, characterized by the Lankford parameter, r.
186 citations
31 Jan 2002-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the global and local mechanical response of friction stir welded AA2024 is examined experimentally and numerically, assuming an iso-stress configuration, local constitutive data were determined for the various weld regions and used as input for a 2D finite element model.
Abstract: The mechanical response of heterogeneous structures, such as weldments, is largely governed by the response of the local constituents. In the present paper, the global and local mechanical response of friction stir welded AA2024 is examined experimentally and numerically. Full field strain measurements are obtained on transversely loaded tensile specimens via the digital image correlation technique. Assuming an iso-stress configuration, local constitutive data were determined for the various weld regions and used as input for a 2-D finite element model. The simulation results were compared with the experimental results to assess the viability of the modeling approach and the validity of the iso-stress assumption
185 citations