A new methodology for thermoelastic model identification in composite materials using digital image correlation

Rodrigues, Francisco de Sá; Marques, Ricardo Manuel Fernandes; Tabrizi, Isa Emami; Kefal, Adnan; Ali, Hafiz Qasim; Yıldız, Mehmet; Suleman, Afzal

doi:10.1016/j.optlaseng.2021.106689

Cited by 13 publications

(3 citation statements)

References 30 publications

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“…Smoothing element analysis (SEA), introduced by Tessler et al [42], is another technique for smoothing noisy displacement fields. Originally applied to post-processing of FE solutions, where nodal displacements are used to calculate strains in the solution domain, it was applied to DIC measurements by de Sá Rodriguez et al [43] and Tabrizi et al [44].…”

Section: Digital Image Correlationmentioning

confidence: 99%

Experiments and Modelling of Composite–Aluminium Bolted Joints

Wemming

2022

Linköping Studies in Science and Technology. Licentiate Thesis

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Throughout the project you always had an open door and guided me with your valuable comments, thoughts and ideas. Furthermore, I would like to thank my colleagues and fellow PhD students at Saab AB and Linköping University for their help, encouragement and interesting discussions. I also want to express my gratitude towards Image Systems Motion Analysis, who provided equipment and knowledge about DIC measurements.Finally, I would like to express my gratitude to my family for their support and encouragement.

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Section: Digital Image Correlationmentioning

confidence: 99%

Experiments and Modelling of Composite–Aluminium Bolted Joints

Wemming

2022

Linköping Studies in Science and Technology. Licentiate Thesis

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“…Exemplarily, digital image correlation (DIC), ultrasonic flaw detection, x-ray methods and thermography are named. In the literature, several methods are usually applied together so that a validation is possible [10,[14][15][16][17]. Pirinu et al investigated the fatigue behavior of holed CFRP elements under tensile and bending loads and utilized a DIC system along with active thermography and ultrasonic to determine damage.…”

Section: Introductionmentioning

confidence: 99%

Fatigue and Progressive Damage of Thin Woven CFRP Plates Weakened by Circular Holes

et al. 2023

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Background In order to design thin-walled components it is necessary to consider the presence of holes and their effects. For high performance composite structures, this is still an issue, since usually only coupons are used in experimental observations and the influence of free edges and the hole affects the fatigue behavior mutually. Objective This work aims to find, through experimental trials, an empirical model that can be used to describe and predict the damage propagation, originating from a circular hole. Methods A fatigue test series is performed and the damage initiation and propagation is monitored with three-dimensional digital image correlation, with which the occurring damage can be measured. Validation of the experimentally induced damage size measured with digital image correlation is performed intermediate with an in-situ measurement with active thermography and phased array ultrasonic. The novelty of this approach is that wide specimens are used, where the influence of the free edges on the hole does not occur. Results The progression of the detected damage over the test reflects the applied loads, where higher loads cause larger damage. For all defined load levels a similar damage propagation is identified, allowing to establish an empirical model and fit it to the test data. Conclusion The proposed empirical model provides a novel approach to describe and predict damage propagation originating from a circular hole in thin-walled composite plates. In addition, it is shown that the damage propagation ceases for the selected plate configuration and thus does not lead to a complete failure.

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“…5 Therefore, considerable analytical and experimental research has been conducted to understand the damage development inside multidirectional laminates under various loading conditions. [6][7][8][9] Among the different loading conditions that a composite structure can experience during its service 1 Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey 2 lifetime, the shear response could be very tricky to understand due to the fact that the material behavior under inplane shear loading conditions is majorly controlled by a less stiff component of the composite, i.e., polymer matrix. Hence, understanding the damage development mechanisms in laminate composites under shear loading is critical.…”

Section: Introductionmentioning

confidence: 99%

An experimental multi-instrumental approach to understand the size effect on the damage propagation of plain-woven CFRP composites under shear loading

Ali

Khan

Tabrizi

et al. 2022

Journal of Composite Materials

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Damage propagation and failure mechanisms in woven carbon fiber composites are complex due to their anisotropic nature and are affected by the percentage of constituents of the composite materials named fiber, matrix, and void. The “size effect” that relies on these parameters can be influenced by the volume fraction percentages of these constituents and composite manufacturing parameters. This research introduces a multi-instrumental structural health monitoring approach to understand damage progression due to the size effect under the Iosipescu configuration. Acoustic emission (AE) signals are classified via a K-means clustering algorithm to distinguish the damage activities based on their frequencies. It is shown that both size effect and void content are relatable based on cumulative AE energy jumps attributed to the accumulation of micro-damages inside these laminates. The thermal variations observed by passive infrared thermography are associated with the nonlinear response of the shear behavior. The outcomes of the thermal analysis are depicted to show the relationship between damage progress and laminate thickness. The digital image correlation analysis is performed to measure the full-field strain measurement during the testing. The correspondence of material thickness with elastic shear behavior is investigated via a comparison of shear strain maps.

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A new methodology for thermoelastic model identification in composite materials using digital image correlation

Cited by 13 publications

References 30 publications

Experiments and Modelling of Composite–Aluminium Bolted Joints

Experiments and Modelling of Composite–Aluminium Bolted Joints

Fatigue and Progressive Damage of Thin Woven CFRP Plates Weakened by Circular Holes

An experimental multi-instrumental approach to understand the size effect on the damage propagation of plain-woven CFRP composites under shear loading

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