Science, Space and Technology News 2024
Researchers at Tohoku University have developed a novel material that records the stress history of infrastructure through a luminescent afterglow, offering a power-free, easily integrated solution for aging infrastructure issues. This material, which can store stress data for extended periods without needing complex equipment, aligns with IoT technology and simplifies structural diagnostics, reducing manpower and costs. Credit: Tomoki Uchiyama, Chao-Nan Xu et al.
“What makes our material truly innovative is that it operates without a power supply, complex equipment, or on-site observation and is easily combined with IoT technology,” points out Tohoku University professor and corresponding author of the study, Chao-Nan Xu. Researchers have explored various materials capable of recording past mechanical loading histories. These materials typically combine stress-luminescent materials with photosensitive materials, creating a system where the material emits light in response to mechanical stress, and this light can be preserved and later analyzed to reconstruct the stress history. However, these materials face several challenges: complex layering structures, dark reactions, and long-term recording performance.
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