The effectiveness of shearography and digital image correlation for the study of creep in elastomers

Pascual-Francisco, Juan Benito; Barragán-Pérez, Omar; Susarrey-Huerta, Orlando; Michtchenko, A.; Martínez-García, Amalia; Farfán-Cabrera, Leonardo Israel

doi:10.1088/2053-1591/aa94ee

Cited by 9 publications

(3 citation statements)

References 24 publications

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“…In response to this problem, in 2017, Liu et al proposed shearography using wave-defect interactions for crack detection in metallic structures [54]. In 2017, Pascual-Francisco et al presented a new application of shearography using the technique to measure viscoelasticity in terms of creep compliance of elastomeric materials [65,66]. The results were compared to that obtained with DIC, and this work demonstrated that shearography can be successfully applied to the creep analysis of viscoelastic materials.…”

Section: Recent Applications Of Shearographic Ndtmentioning

confidence: 99%

Digital Shearography for NDT: Phase Measurement Technique and Recent Developments

et al. 2018

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Composite materials have seen widespread use in the aerospace industry and are becoming increasingly popular in the automotive industry due to their high strength and low weight characteristics. The increasing usage of composite materials has resulted in the need for more effective techniques for nondestructive testing (NDT) of composite structures. Of these techniques, digital shearography is one the most sensitive and accurate methods for NDT. Digital shearography can directly measure strain with high sensitivity when combined with different optical setups, phase-shift techniques, and algorithms. Its simple setup and less sensitivity to environmental disturbances make it particularly well suited for practical NDT applications. This paper provides a review of the phase measurement technique and recent developments in digital shearographic NDT. The introduction of new techniques has expanded the range of digital shearography applications and made it possible to measure larger fields and detect more directional or deeper defects. At the same time, shearography for different materials is also under research, including specular surface materials, metallic materials, etc. Through the discussion of recent developments, the future development trend of digital shearography is analyzed, and the potentials and limitations are demonstrated.

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Section: Recent Applications Of Shearographic Ndtmentioning

confidence: 99%

Digital Shearography for NDT: Phase Measurement Technique and Recent Developments

et al. 2018

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“…Por lo tanto, se tiene que explorar otras técnicas de medición para evitar estos errores. Recientemente, se han empezado a utilizar nuevas y novedosas técnicas de medición como lo son: la técnica de Moiré (O'Brien et al, 2007), la interferometría de moteado láser (Yang et al, 2014), shearography (Pascual-Francisco et al, 2017) y correlación digital de imágenes (DIC) (Pascual-Francisco et al, 2020). Estas técnicas se conocen como técnicas de no contacto y de campo completo.…”

Section: Introductionunclassified

Medición y obtención de modelo de fluencia lenta en elastómeros

Amador-González

Sotomayor-del-Moral

Pascual-Francisco

et al. 2021

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En este trabajo se aplicó la técnica de correlación digital de imágenes para la medición de deformaciones unitarias en material de caucho. El material estudiando se sometió a experimentos de fluencia lenta o creep de corto plazo, con una duración de 10 minutos. Las deformaciones unitarias medidas en ese periodo de tiempo fueron graficadas y, mediante la implementación de un modelo viscoelástico, se obtuvieron las funcione de creep, con las cuales es posible predecir las deformaciones para tiempos prolongados. Se comprobó que el comportamiento de creep en el caucho se ajusta al modelo viscoelástico de Burgers. Asimismo, los resultados obtenidos demostraron que la técnica de correlación digital de imágenes es una herramienta poderosa para la evaluación de viscoelasticidad en los elastómeros.

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“…Consequently, it has already received wide acceptance for nondestructive testing [6,7]. Besides, some applications of shearography reported are: the evaluation of delamination in tires, nondestructive test in aircraft structures, evaluating debond in composite structures, evaluation of residual stress, 3D shapes measurement, vibrations analysis and strain measurement [8][9][10]. This technique has proven to be a relatively low-cost [11].…”

Section: Introductionmentioning

confidence: 99%

Shearography as a tool to measure creep strain in sealing elastomers

et al. 2019

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In this work, a new application of digital speckle pattern shearing interferometry (shearography) for strain measurement is proposed. This optical technique is implemented to measure strain in elastic materials. Three different sealing elastomers were tested in short-term creep tests in order to assess creep compliance, which is an important mechanical property for viscoelastic materials. The creep tests were carried out applying a constant tensile load to a specimen. An in-plane shearography setup was implemented to measure the creep strains in the polymers. Results of creep strains were compared with that obtained with a commercial equipment of digital image correlation (DIC). Although some limitations were found for shearography, it was possible to verify the adaptability of this technique for strain measurement in elastomers.

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The effectiveness of shearography and digital image correlation for the study of creep in elastomers

Cited by 9 publications

References 24 publications

Digital Shearography for NDT: Phase Measurement Technique and Recent Developments

Digital Shearography for NDT: Phase Measurement Technique and Recent Developments

Medición y obtención de modelo de fluencia lenta en elastómeros

Shearography as a tool to measure creep strain in sealing elastomers

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