Mechanoresponsive luminogen (MRL)-based real-time and visible detection method for biaxial fatigue crack propagation

Zhang, Zhe; Lin, Hong; Lin, Qiang; Chen, Gang; Chen, Xu

doi:10.1016/j.ijfatigue.2022.107161

Cited by 6 publications

(6 citation statements)

References 49 publications

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“…In the past decades, although preliminary investigations on organic MCL-based detection methods have been carried out, there are still many challenges for applications in real engineering industry. [35,40] The metals and composites are widely used as structural materials of the equipment. The local strain concentration of the equipment in service is limited.…”

Section: Challenges and Prospectsmentioning

confidence: 99%

“…Therefore, TPE-4N provides new opportunities for developing large-scale and visual detection methods for structural damage. Qiu et al [34,35] detected the stree-strain distribution and fatigue crack propagation using the fluorescence response of TPE-4N films. The real-time fatigue crack length and fatigue crack growth rate can be obtained by fluorescence distribution.…”

Section: Introductionmentioning

confidence: 99%

“…Qiu et al. [ 34,35 ] detected the stree–strain distribution and fatigue crack propagation using the fluorescence response of TPE‐4N films. The real‐time fatigue crack length and fatigue crack growth rate can be obtained by fluorescence distribution.…”

Section: Introductionmentioning

confidence: 99%

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Visualization and Depth Estimation of Inner Crack in High‐Pressure Equipment Based on Organic Mechanochromic Luminescent Materials

Zhang

Xiao-wen

Zhang

et al. 2023

Adv Materials Inter

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Invisible hydrogen‐induced cracking or stress corrosion cracking easily appears in high‐pressure equipment in service. Mechanoresponsive luminogens (MRLs) can convert mechanical force into visible luminescence emission. Thus, MRL‐based detection methods to damage of structures have been paid extensive attention in recent years. However, the structural damage‐induced luminescence response and mechanism are still not fully comprehended. In this study, organic mechanochromic luminescent materials (1,1,2,2‐tetrakis (4‐nitrophenyl) ethene (TPE‐4N)) are proposed to detect the invisible inner crack in high‐pressure equipment. Because the high‐pressure equipment in service is subjected to tensile loading, the inner crack‐induced fluorescence response and mechanism under tension are investigated. The inner crack‐induced local strain concentration can be transformed into a visible green fluorescence, which can be easily observed from the outside. According to the appearance of fluorescence, the position of the inner crack can be detected. Moreover, the depth level of the inner crack can be quantitatively estimated using applied tensile loading and the ratio of fluorescent area. The investigations may provide a new idea of non‐destructive evaluation material and method for invisible damage in high‐pressure equipment.

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Section: Challenges and Prospectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Visualization and Depth Estimation of Inner Crack in High‐Pressure Equipment Based on Organic Mechanochromic Luminescent Materials

Zhang

Xiao-wen

Zhang

et al. 2023

Adv Materials Inter

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“…Thus, the heterogenous strain distribution in the welded joint under monotonic tensile loading and cyclic loading can be evaluated from the fluorescence intensity 40 . Moreover, the fatigue crack length and growth path in aluminum alloy under biaxial loading are detected by fluorescence signal 41 . Besides metals, damage of composites is also successfully detected by TPE‐4N film.…”

Section: Introductionmentioning

confidence: 99%

“…40 Moreover, the fatigue crack length and growth path in aluminum alloy under biaxial loading are detected by fluorescence signal. 41 Besides metals, damage of composites is also successfully detected by TPE-4N film. Meng et al 42 proposed a direct visualization method based on TPE-4N film for detecting the interface debonding of fiberreinforced polymers.…”

Section: Introductionmentioning

confidence: 99%

Organic mechanochromic luminescence‐based visualization of fatigue damage and life prediction of aluminum to steel resistance spot welds

Xiao-wen

Zhang

Shi³

et al. 2023

Fatigue Fract Eng Mat Struct

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Dissimilar material joined structures are increasingly used in the automotive industry to reduce weight in the vehicle body structure for better fuel economy. Therefore, it is necessary to reveal the fatigue damage and develop the fatigue life prediction method of dissimilar material joined structures. Unlike conventional detection methods, mechanoresponsive luminogen‐based method can directly visualize stress distribution and fatigue crack growth. An organic mechanochromic luminescence material (TPE‐4N) is therefore used to detect the fatigue damage of coach peel Al‐steel resistance spot welds. The fatigue crack initiation and propagation are detected as visible green fluorescence under ultraviolet excitation. The results show that the fluorescence intensity increases linearly in the early stage of fatigue cycles while grows much faster in the specimen with lower fatigue life. A new fatigue life prediction method has been developed based on the response of fluorescence intensity.

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Achieving room-temperature self-healing of mechanoluminescent materials by dynamic borate ester bonding

Lin,

Chen,

Huang

et al. 2023

Sci. China Mater.

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Mechanoresponsive luminogen (MRL)-based real-time and visible detection method for biaxial fatigue crack propagation

Cited by 6 publications

References 49 publications

Visualization and Depth Estimation of Inner Crack in High‐Pressure Equipment Based on Organic Mechanochromic Luminescent Materials

Visualization and Depth Estimation of Inner Crack in High‐Pressure Equipment Based on Organic Mechanochromic Luminescent Materials

Organic mechanochromic luminescence‐based visualization of fatigue damage and life prediction of aluminum to steel resistance spot welds

Achieving room-temperature self-healing of mechanoluminescent materials by dynamic borate ester bonding

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