A temporal phase unwrapping algorithm for photoelastic stress analysis

Baldi, Antonio; Bertolino, Filippo; Ginesu, Francesco

doi:10.1016/j.optlaseng.2006.08.006

Cited by 20 publications

(4 citation statements)

References 20 publications

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“…It was often used in the study of photoelasticity due to its strong effect of stress-birefringence and very small optical and mechanical creep at room temperature [13,14].…”

Section: Resultsmentioning

confidence: 99%

Magneto-optical coupling in bilayer composites of Terfenol-D and Polycarbonate

et al. 2013

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Bilayer composites that can show magnetobirefringence effect were fabricated based on the product effects of magnetostriction and stress-birefringence. Large magneto-optical responses were obtained under a magnetic field lower than 700 Oe at room temperature for the bilayers. The magneto-optical retardation was observed to decrease along the direction vertical to the interface, suggesting a non-uniform stress distribution along the thickness direction in the elasto-optical layer. Local action principle or Saint-Venant's principle was taken into account in analysis of the interlayer elastic coupling and the magneto-birefringence effect. The theory that was consistent with experiments was obtained.

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“…It was often used in the study of photoelasticity due to its strong effect of stress-birefringence and very small optical and mechanical creep at room temperature [13,14].…”

Section: Resultsmentioning

confidence: 99%

Magneto-optical coupling in bilayer composites of Terfenol-D and Polycarbonate

et al. 2013

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“…With the development of optical mechanics experimental technologies, the solid 3D stress freezing method has been used to make progress in the photoelastic material properties, model preparation, 3D optical measurement theory, fringe picking and resolution analysis, and free-surface stress measurements [129][130][131][132][133]. It is a convenient, economical, and effective way to intuitively and quantitatively analyze 13 Geofluids the complex stress field in the solid structure.…”

Section: Integration Of 3dp and The Stress Freezing Techniquementioning

confidence: 99%

Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses

et al. 2021

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In the engineering of underground construction, the discontinuous structures in rock mass have important influences on the mechanical behaviors of the subsurface of rock mass. The acquisition of mechanical parameters is the basis of rock mass engineering design, construction, safety, and stability evaluation. However, the mechanical parameters and failure characteristics of the same rock mass under different mechanical conditions cannot be obtained due to the limitations of specimen preparation techniques. In recent years, with the continuous development of 3D printing (3DP) technology, it has been successfully applied to the repetitive preparation of rock mass samples. The combinations of 3DP and other techniques, such as 3D scanning and CT scanning, provided a new approach to study the mechanical behavior of complex structural rock masses. In this study, through a comprehensive review of the technical progress, equipment situation, application fields, and challenges of the use of 3DP technology, the following conclusions were obtained: (1) 3DP technology has advantages over traditional rock mass specimen preparation techniques, and the verification of test results using 3D printed samples shows that the 3DP has broad application prospects in geotechnical engineering. (2) The combination of 3DP and other advanced techniques can be used to achieve the accurate reconstruction of complex structural rock masses and to obtain the mechanical and failure characteristics of the same rock mass structure under different mechanical boundary conditions. (3) The development of 3DP materials with high strength, high brittleness, and low ductility has become the major bottleneck in the application of 3DP in geotechnical engineering. (4) 3D printers need to meet the high precision and large size requirements while also having high strength and long-term printing ability. The development of 3D printers that can print different types of materials is also an important aspect of the application of 3DP in geotechnical engineering.

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“…The unwrapped phase distributions of the higher frequency fringes can be readily calculated without a general phase unwrapping. The algorithm can be expressed as follows [55], [56]:…”

Section: Phase Unwrappingmentioning

confidence: 99%

Fringe projection profilometry for recovering 2.5D shape of ancient coins

2021

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<p class="Abstract">The relief of form is undoubtedly one of the most topical topics in the field of cultural heritage. Physical access to historic and artistic manufactures can be limited by a lot of factors. For example, the access to the collection of the ancient coins is difficult, especially for students. Indeed, for coins digital archive of high-quality three-dimensional model and remote fruition is of great interest. The use of projected fringes for the measurement of surface profile is a well-developed technique. In this paper, we present a surface profile measurement system for small objects of cultural heritage where it is important not only to detect the shape with good accuracy but also to capture and archive the signs due to ageing. The illustrated equipment is simple, reliable, and cheap. Furthermore, some examples of acquisitions are presented to demonstrate the potentiality of the proposed scheme for recovering 2.5D shape of cultural heritage objects.</p>

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A temporal phase unwrapping algorithm for photoelastic stress analysis

Cited by 20 publications

References 20 publications

Magneto-optical coupling in bilayer composites of Terfenol-D and Polycarbonate

Magneto-optical coupling in bilayer composites of Terfenol-D and Polycarbonate

Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses

Fringe projection profilometry for recovering 2.5D shape of ancient coins

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