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: In this article, the problem of determining true stress-strain curves from flat tensile specimens beyond the onset of necking has been investigated based on finite element analyses under consideration of experimental accessible data using digital image correlation (DIC).
Abstract: The problem of determining true stress-strain curves from flat tensile specimens beyond the onset of necking has been investigated based on finite element analyses under consideration of experimental accessible data using digital image correlation (DIC). The displacement field on the specimen surface is determined by in-situ deformation field measurement. A three-dimensional finite element study with different stress-strain-curves has been carried out to develop a formula, with which it is possible to calculate the true stress subject to the strain in the necking region. The method has been used to evaluate the true stress-strain curve with a so-called micro flat tensile specimen, which is normally used to determine the material properties in the material gradient around thin weldments.
78 citations
TL;DR: The finite element simulation based on the fitted model confirms the effect of gravity on the deformation of very soft tissue and validates the new method for estimating the zero-strain state.
78 citations
TL;DR: In this paper, the different types of plastic zones found at a crack tip under cyclic loading of a commercially available aluminium alloy are studied based on 3D finite element simulations and mechanical testing.
78 citations
TL;DR: In this paper, a non-destructive technique for the determination of in situ stresses in concrete structures, referred to as the core-drilling method, was presented, which is similar to the ASTM holedrilling strain gage method, except that the core drilling method is formulated in the current work are performed with traditional photogrammetry, and more accurate three-dimensional digital image correlation.
Abstract: We present a non-destructive technique for the determination ofin situ stresses in concrete structures, reterred to as the core-drilling method. The method is similar to the American Society for Testing and Materials (ASTM) hole-drilling strain gage method, except that the core-drilling method is formulated in the current work are performed with traditional photogrammetry, and the more novel (and more accurate) three-dimensional digital image correlation. In this paper we review the background elasticity theory and we discuss the results of verification experiments on steel plates. Calculated normal stresses are within 17% of applied values for photogrammetry, and 7% for three-dimensional digital image correlation.
77 citations
TL;DR: In this article, the authors evaluated the stress-strain relationship between Al and Si constituents in AlSi10Mg alloy produced by selective laser melting (SLM) under uniaxial tension at room temperature.
77 citations