Determination of the mode I crack tip opening rate and the rate dependent cohesive properties for structural adhesive joints using digital image correlation

Sun, Fengzhen; Zhang, R.; Blackman, B.R.K.

doi:10.1016/j.ijsolstr.2021.01.034

Cited by 21 publications

(5 citation statements)

References 34 publications

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“…Therefore, it is important to introduce in‐situ monitoring techniques for damage inspection of adhesively bonded joints due to moisture. Recently, several in‐situ monitoring techniques, such as fiber optic monitoring, X‐ray microtomography, digital image correlation, acoustic emissions, and mechanoluminescence, have been introduced to observe crack propagation in adhesive joints 15–19 . However, until now, there are almost no methods for direct measurement of water penetration in the adhesive layer.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, several in-situ monitoring techniques, such as fiber optic monitoring, X-ray microtomography, digital image correlation, acoustic emissions, and mechanoluminescence, have been introduced to observe crack propagation in adhesive joints. [15][16][17][18][19] However, until now, there are almost no methods for direct measurement of water penetration in the adhesive layer. Degradation due to water absorption is therefore only speculative and insitu monitoring of moisture distribution is essential to discuss what is happening.…”

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confidence: 99%

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Experimental measurement of moisture distribution in the adhesive layer using near‐infrared spectroscopy

Han

Sekiguchi

Shimamoto

et al. 2023

J of Applied Polymer Sci

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Adhesive joints are degraded when exposed to moist conditions, making it essential to assess the permeation distance of absorbed moisture. However, monitoring the water penetration in the adhesive layer is challenging because the adhesive layer is sandwiched between the adherends. To overcome this difficulty, we proposed a new monitoring system using fiber-type near-infrared spectroscopy (NIRS), and the moisture distribution at the joint was successfully observed by introducing quartz glass as one side of the substrate. First, the change in the absorbance spectra owing to water absorption by an epoxy adhesive was investigated by immersing epoxy-coated aluminum alloy plates in temperature-controlled water. It was found that the water content can be evaluated by monitoring the change in the peak intensity appearing around 1900-1950 nm. Next, water penetration into the adhesive layer sandwiched between the quartz glass and aluminum alloy was investigated by scanning the surface. The water permeation distance was found to change with temperature. Under the 23 C immersion condition, approximately 2.5 mm of water penetration was observed after 8 weeks. Because the simulation results using Fick's law of diffusion showed similar trends, it was experimentally confirmed that Fickian diffusion dominates the water distribution in the adhesive layer.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Experimental measurement of moisture distribution in the adhesive layer using near‐infrared spectroscopy

Han

Sekiguchi

Shimamoto

et al. 2023

J of Applied Polymer Sci

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“…Os valores são comparados a partir de um estado inicial de referência e o rastreamento de mudanças de configurações subsequentes registradas [4,5,6]. O efeito de choque térmico ocasiona mudanças em um curto período de tempo pela abrupta variação das repostas dos diferentes componentes de um sistema de vedações verticais [7,8,9]. Com isso, este trabalho teve por objetivo avaliar o uso da técnica DIC para determinar os deslocamentos de um sistema de vedação vertical, e seus detalhes, submetido a ação de calor e choque térmico.…”

Section: Introductionunclassified

Uso da Correlação de Imagem Digital no ensaio de ação de calor e choque térmico de vedações verticais

Cremonesi,

Cleto,

Souza

et al. 2023

Iv Workshop De Tecnologia De Processos E Sistemas Construtivos

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Este artigo teve como objetivo verificar a aplicação do uso da técnica de correlação digital de imagem (DIC) no monitoramento dos deslocamentos de um sistema de vedação vertical. Esses sistemas são expostos a diversas solicitações resultantes da combinação de fenômenos naturais, como a ação de calor pela radiação solar e resfriamentos pelas águas de chuva. Mudanças em um curto espaço de tempo, ocasionadas por um resfriamento brusco de uma superfície aquecida, podem gerar o fenômeno de choque térmico. Este fenômeno, em consequência, pode alterar a maneira como determinados trechos da fachada respondem a essas solicitações e, consequentemente, reduzir o desempenho e a durabilidade do sistema. Com isso, este estudo propôs analisar o uso da técnica DIC para medir os deslocamentos de um trecho representativo de um sistema de vedação vertical composto por uma parede, contendo uma junta de dilatação, sob a ação de calor e efeito de choque térmico, em laboratório. Os resultados demonstraram a viabilidade que o uso do DIC proporcionou no estudo das mudanças dos deslocamentos ao longo da ação de calor, considerando o efeito do choque térmico, e observar a influência do fenômeno sobre a maneira como as alterações ocorrem no comportamento do sistema e seus componentes durante o ensaio.

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“…In this mode, the crack opening occurs under tensile stress. [6][7][8][9] Because of this, it is of great signicance to detect and monitor the tensile damage evolution in the tensile process to ensure structural safety, integrity, and operational performance. Commercially available sensors come in many diverse forms, such as metal-foil strain gauges, ber grating sensors, and acoustic emission sensors.…”

Section: Introductionmentioning

confidence: 99%

A high-performance porous flexible composite film sensor for tension monitoring

Feng

Cai

et al. 2022

RSC Adv.

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Determination of the mode I crack tip opening rate and the rate dependent cohesive properties for structural adhesive joints using digital image correlation

Cited by 21 publications

References 34 publications

Experimental measurement of moisture distribution in the adhesive layer using near‐infrared spectroscopy

Experimental measurement of moisture distribution in the adhesive layer using near‐infrared spectroscopy

Uso da Correlação de Imagem Digital no ensaio de ação de calor e choque térmico de vedações verticais

A high-performance porous flexible composite film sensor for tension monitoring

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