Scattered Light in Photoelasticity—basic Equipment and Techniques

Srinath, L. S.

doi:10.1016/b978-0-08-012998-3.50032-x

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…Nevertheless, to avoid difficulties of this technique, which requires a lot of time and several models for a whole study, the non-destructive methods based on the polarization of the scattered or transmitted light in a birefringent material, have been developed [12][13][14][15][16][17]. A few years ago, solid mechanics laboratory of Poitiers has developed a simple and fast method using a numerical image processing of the scattered light.…”

Section: Description Of Slp Techniquementioning

confidence: 99%

“…Since the 1930s, experimental stress studies by photoelasticity in three-dimensional models have been usually performed by employing the frozen stress technique coupled with a mechanical slicing and a two-dimensional analysis of each slice in a classical polariscope [10,11]. Nevertheless, to avoid difficulties of this technique, which requires a lot of time and several models for a whole study, the non-destructive methods based on the polarization of the scattered or transmitted light in a birefringent material, have been developed [12][13][14][15][16][17]. A few years ago, solid mechanics laboratory of Poitiers has developed a simple and fast method using a numerical image processing of the scattered light.…”

Section: Description Of Slp Techniquementioning

confidence: 99%

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Verification of a spherical plain bearing finite-element model using scattered light photoelasticity tests

Germaneau

Peyruseigt

Mistou

et al. 2008

Proceedings of the Institution of Mechanical Engineers, Part J:

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Spherical plain bearings are used on many components of Airbus aircrafts like engineto-pylon and pylon-to-wing links. Their design is based on contact pressure distribution on spherical surfaces. Until now, empirical laws are applied to determine it, and the aim of this work is to develop a numerical modelling in order to validate the use of these laws.The assumptions on the numerical model and their significance have been verified and measured by scattered light photoelasticity (SLP) on an epoxy replica of the bearing. The analysis of this type of bearing is difficult due to its three-dimensional behaviour and its spherical confined contact. The SLP technique allows getting information on stress fields inside an epoxy specimen with the analysis of photoelastic fringes. Comparing photoelastic fringes with simulated results, the finite-element model has been improved to be more representative of the real life bearing. In addition, some critical factors on the bearing behaviour have been obtained. method has been developed in the whole domain: scattered light photoelasticity (SLP)[1, 2] and digital volume correlation [3]. With these methods, a full comparison in the whole volume is performed between numerical modelling and experimental specimen. In the present work, the SLP technique has been employed, and the usefulness of this fundamental approach is shown to study the three-dimensional stress repartition in aeronautical plain bearings.Until the A380 program, the engine manufacturers of Airbus aircrafts had the responsibility of design and manufacture of engine mounts on aircraft pylons. These parts, critical for a good mechanical behaviour of the pylon-to-engine link, are equipped with spherical plain bearings (Fig. 1). Their role is to compensate strain of engine mounts and the differential thermal expansions between the engine and the pylon to avoid the link hyperstaticity that can induce unwanted loads on several engine and pylon parts. Since the A380 program, Airbus took the responsibility for these mounts and wishes to improve its knowledge of the mechanical behaviour of these elements. JET408

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Section: Description Of Slp Techniquementioning

confidence: 99%

Section: Description Of Slp Techniquementioning

confidence: 99%

Verification of a spherical plain bearing finite-element model using scattered light photoelasticity tests

Germaneau

Peyruseigt

Mistou

et al. 2008

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…This corresponds to the relation needed. Equation ( 9) specialized to the case of optical frequencies can be substituted into equation (5). It follows that 1 2…”

Section: The Macroscopic Descriptionmentioning

confidence: 99%

On photoelasticity and the quadratic electrostrictive effect

Kloos

1997

J. Phys. D: Appl. Phys.

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Scattered Light in Photoelasticity—basic Equipment and Techniques

Cited by 2 publications

References 4 publications

Verification of a spherical plain bearing finite-element model using scattered light photoelasticity tests

Verification of a spherical plain bearing finite-element model using scattered light photoelasticity tests

On photoelasticity and the quadratic electrostrictive effect

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