Investigation of progressive failure in composites by combined simulated and experimental photoelasticity

Deuschle, H. Matthias; Wittel, Falk K.; Gerhard, H.; Busse, G.; Kröplin, Bernd

doi:10.1016/j.commatsci.2005.12.029

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…We refer to textbooks on optics [Hec02] and solid mechanics [Sha08] for an introduction to the topic, to the manual by Doyle and Phillips [Kob83], and to the video [FM49] that served for validation of our technique. A recent example of photoelasticity applications is the work by Deuschle et al [DWG*06] in the context of generating ground truth for simulation data. Traditional photoelastic analysis (and hence also our approach) does not involve scattering.…”

Section: Related Workmentioning

confidence: 99%

Photoelasticity Raycasting

Bußler

Ertl

Sadlo

2015

Computer Graphics Forum

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Figure 1: Brake Lever dataset. Tensor field lines (a) are continuous but not quantitative. Superquadric glyphs (b) are quantitative but discrete. Von Mises stress rendering (c) is continuous but not showing orientation. Our virtual photoelasticity (d), which corresponds to experimental stress analysis with polariscopes, is continuous, quantitative, and conveys orientation. AbstractWe present a novel physically-based method to visualize stress tensor fields. By incorporating photoelasticity into traditional raycasting and extending it with reflection and refraction, taking into account polarization, we obtain the virtual counterpart to traditional experimental polariscopes. This allows us to provide photoelastic analysis of stress tensor fields in arbitrary domains. In our model, the optical material properties, such as stress-optic coefficient and refractive index, can either be chosen in compliance with the subject under investigation, or, in case of stress problems that do not model optical properties or that are not transparent, be chosen according to known or even new transparent materials. This enables direct application of established polariscope methodology together with respective interpretation. Using a GPU-based implementation, we compare our technique to experimental data, and demonstrate its utility with several simulated datasets.

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Section: Related Workmentioning

confidence: 99%

Photoelasticity Raycasting

Bußler

Ertl

Sadlo

2015

Computer Graphics Forum

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“…contact points, critical sections, etc. Photoelasticity has been widely used for the experimental stress analysis of gears, particularly, because it offers a convenient way of assessing the maximum stress at the tooth root fillet (Lingaiah and Ramachandra [8], Deuschle et al [9], Wang [10], Novikov et al [11], Spitas et al [12], Spitas and Spitas [13]). Although popular, photoelasticity is practically impossible to use in high stress concentration regions such as contact points and crack tips because of the very high density of the isochromatic fringes near the point of stress singularity.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Load Sharing in Multiple Gear Tooth Contact Using the Stress‐Optical Method of Caustics

Spitas

Papadopoulos

Spitas

et al. 2011

Strain

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In this paper, a comprehensive methodology for calculating load sharing in multiple tooth contact is presented based on the experimental stress‐optical method of caustics. The technique is applied to a set of poly‐methyl‐methacrylate gears at various meshing positions covering a complete meshing cycle, including single and multiple gear tooth contact. The load sharing factor (LSF) is calculated using well‐established mathematical formulae from the photographs of the transmitted caustics and the obtained results are compared with the pertinent International Organisation for Standardisation and American Gear Manufacturers Association standards with which good agreement is verified. The proposed method is a reliable alternative for measuring load distribution in gear teeth compared with photoelasticity and other experimental techniques.

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“…Left: Setup and operating principle of a circular polariscope (Schaaf et al [3]); Right: Polarising filter image of a bonded column beam connection (Prautzsch [4]).In Deuschle et al[5] a methodology is presented to transfer 3D FEM stress plots to 2D virtual / simulated polarising filter images. For every nodal point of the mesh the photoelastic relevant part of the stress tensor = √ ( 11 − 33 ) 2…”

mentioning

confidence: 99%

Development of a mobile device for the evaluation of the current in‐situ stress condition in glass – Experimental and numerical analysis for bonded and mechanical joints

et al. 2018

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Monitoring installation process and utilisation of glass and hybrid components in structural glass has become increasingly important. However, to date, there are no generally accepted standard procedures to evaluate the in‐situ stress condition of a built‐in glass. With the aid of photoelasticity a qualitative statement of the stress state in the glass can be made. For this reason, a measurement method and a functional model for a mobile device are being developed with which it is possible to measure in‐situ and identify stress peaks, for example, due to incorrect assembly of a glass fitting. By supporting finite element method (FEM) simulations it is possible to transfer the qualitative results of photoelastic measurements into quantitative results.

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Investigation of progressive failure in composites by combined simulated and experimental photoelasticity

Cited by 5 publications

References 23 publications

Photoelasticity Raycasting

Photoelasticity Raycasting

Experimental Investigation of Load Sharing in Multiple Gear Tooth Contact Using the Stress‐Optical Method of Caustics

Development of a mobile device for the evaluation of the current in‐situ stress condition in glass – Experimental and numerical analysis for bonded and mechanical joints

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