Full-field optical deformation measurement in biomechanics: Digital speckle pattern interferometry and 3D digital image correlation applied to bird beaks

Soons, Joris; Lava, Pascal; Debruyne, Dimitri; Dirckx, Joris J.J.

doi:10.1016/j.jmbbm.2012.05.004

Cited by 37 publications

(21 citation statements)

References 28 publications

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“…Interface 11: 20140908 measured deformation with the FE model output that mimics the experimental conditions ( figure 1c,d). We used DIC measurements, rather than other full-field techniques such as digital speckle pattern interferometry, because the latter requires a stability of the sample (subwavelength stability) that can not be attained in in vivo measurements [15]. Furthermore, the bending and displacement in our experiments is too large for the highly sensitive digital speckle pattern interferometry technique (typically up to only a couple of microns) [15].…”

Section: Validationmentioning

confidence: 99%

“…DIC is an optical full-field technique to calculated threedimensional displacements and strains of deforming objects, which makes it a valuable set-up to validate biomechanical FE models [15]. The solution is obtained by applying speckles on the sample (figure 2), which are used to create a triangular mesh that is compared between photos of the non-deformed and the deformed sample [33].…”

Section: Digital Image Correlation Experimentsmentioning

confidence: 99%

“…Optical full-field methods (e.g. digital speckle pattern interferometry and digital image correlation (DIC)) overcome these drawbacks, but still the strains inside the material cannot be assessed [15]. FE modelling provides a method to approximate the strains and stresses in silico.…”

Section: Introductionmentioning

confidence: 99%

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Finite-element modelling reveals force modulation of jaw adductors in stag beetles

Goyens

Soons

Aerts

et al. 2014

J. R. Soc. Interface.

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Male stag beetles carry large and heavy mandibles that arose through sexual selection over mating rights. Although the mandibles of Cyclommatus metallifer males are used in pugnacious fights, they are surprisingly slender. Our bite force measurements show a muscle force reduction of 18% for tip biting when compared with bites with the teeth located halfway along the mandibles. This suggests a behavioural adaptation to prevent failure. We confirmed this by constructing finite-element (FE) models that mimic both natural bite situations as well as the hypothetical situation of tip biting without muscle force modulation. These models, based on micro-CT images, investigate the material stresses in the mandibles for different combinations of bite location and muscle force. Young's modulus of the cuticle was experimentally determined to be 5.1 GPa with the double indentation method, and the model was validated by digital image correlation on living beetles. FE analysis proves to be a valuable tool in the investigation of the trade-offs of (animal) weapon morphology and usage. Furthermore, the demonstrated bite force modulation in male stag beetles suggests the presence of mechanosensors inside the armature.

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Section: Validationmentioning

confidence: 99%

Section: Digital Image Correlation Experimentsmentioning

confidence: 99%

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Finite-element modelling reveals force modulation of jaw adductors in stag beetles

Goyens

Soons

Aerts

et al. 2014

J. R. Soc. Interface.

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“…The primary disadvantage of DIC is that the accuracy and uncertainty is strongly dependent on the quality and noise of the speckle pattern, lighting, and imaging system (Ke et al, 2011; Ning et al, 2011; Wang et al, 2011). The displacement error and uncertainty of DIC methods are higher than for interferometric methods, and are not well characterized for non-homogenous deformations (Cirello and Pasta, 2010; Soons et al, 2012; Zhang et al, 2002). …”

Section: Experimental Measurements Of Tissue Deformationmentioning

confidence: 99%

Biomechanical assessment in models of glaucomatous optic neuropathy

Nguyen

Ethier

2015

Experimental Eye Research

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The biomechanical environment within the eye is of interest in both the regulation of intraocular pressure and the loss of retinal ganglion cell axons in glaucomatous optic neuropathy. Unfortunately, this environment is complex and difficult to determine. Here we provide a brief introduction to basic concepts of mechanics (stress, strain, constitutive relationships) as applied to the eye, and then describe a variety of experimental and computational approaches used to study ocular biomechanics. These include finite element modeling, direct experimental measurements of tissue displacements using optical and other techniques, direct experimental measurement of tissue microstructure, and combinations thereof. Thanks to notable technical and conceptual advances in all of these areas, we are slowly gaining a better understanding of how tissue biomechanical properties in both the anterior and posterior segments may influence the development of, and risk for, glaucomatous optic neuropathy. Although many challenging research questions remain unanswered, the potential of this body of work is exciting; projects underway include the coupling of clinical imaging with biomechanical modeling to create new diagnostic tools, development of IOP control strategies based on improved understanding the mechanobiology of the outflow tract, and attempts to develop novel biomechanically-based therapeutic strategies for preservation of vision in glaucoma.

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“…Although image analysis is computationally intensive, increasing computer power has made the technique more popular 2 resulting in biomechanical applications such as strain measurements on human bone and tendon, 3 on mouse arteries, 4 on mouse bone, 5 and on finch beak. 6 In the present work, DIC is applied for the first time, to our knowledge, on a living (human) subject. DIC was used for timeresolved, full-field assessment of the movement of the skin in the neck directly above the common carotid artery (CCA).…”

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confidence: 99%

Digital image correlation for full-field time-resolved assessment of arterial stiffness

et al. 2014

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Abstract. Pulse wave velocity (PWV) of the arterial system is a very important parameter to evaluate cardiovascular health. Currently, however, there is no golden standard for PWV measurement. Digital image correlation (DIC) was used for full-field time-resolved assessment of displacement, velocity, acceleration, and strains of the skin in the neck directly above the common carotid artery. By assessing these parameters, propagation of the pulse wave could be tracked, leading to a new method for PWV detection based on DIC. The method was tested on five healthy subjects. As a means of validation, PWV was measured with ultrasound (US) as well. Measured PWV values were between 3.68 and 5.19 m∕s as measured with DIC and between 5.14 and 6.58 m∕s as measured with US, with a maximum absolute difference of 2.78 m∕s between the two methods. DIC measurements of the neck region can serve as a test base for determining a robust strategy for PWV detection, they can serve as reference for three-dimensional fluid-structure interaction models, or they may even evolve into a screening method of their own. Moreover, full-field, time-resolved DIC can be adapted for other applications in biomechanics.

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Full-field optical deformation measurement in biomechanics: Digital speckle pattern interferometry and 3D digital image correlation applied to bird beaks

Cited by 37 publications

References 28 publications

Finite-element modelling reveals force modulation of jaw adductors in stag beetles

Finite-element modelling reveals force modulation of jaw adductors in stag beetles

Biomechanical assessment in models of glaucomatous optic neuropathy

Digital image correlation for full-field time-resolved assessment of arterial stiffness

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