微压痕下软膜微尺度变形的三维成像与测量

IF 4.5 3区 工程技术 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Shaohua Yang , Yue Liu , Yukun Su , Han Gao , Kaiqiang Sun , Qin Xu , Qiuting Zhang , Ye Xu
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引用次数: 0

摘要

微压痕已被用于软质材料力学性能的测量。然而,软界面复杂的接触力学对传统测量方法准确表征力学参数提出了挑战。在这项工作中,我们提出了一种原位成像装置,能够测量受微压头影响的软弹性薄膜的三维(3D)微尺度变形。结合荧光共聚焦成像和颗粒跟踪技术,精确量化了微尺度表面位移剖面和应力应变分布。利用这种技术,我们直接比较了具有一定厚度范围的软薄膜的微观变形,证明了随着薄膜厚度的减少,从“下沉”到“堆积”的转变。我们还揭示了微压头和软膜在不同润滑条件下的位移场的复杂差异。这些结果表明,我们的实验装置是理解各种软质材料独特的微观力学行为的有力工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Three-dimensional imaging and measurement of the microscale deformation in soft thin films under micro-indentation
Micro-indentation has been used in measuring mechanical properties of soft materials. However, the complex contact mechanics of soft interfaces pose challenges in the accurate characterization of mechanical parameters from conventional measurement methods. In this work, we present an in situ imaging setup capable of measuring three-dimensional (3D) microscale deformation of soft elastic thin films subjected to a microindenter. Combining fluorescent confocal imaging and particle tracking techniques, microscale surface displacement profiles and stress–strain distributions are accurately quantified. Using this technique, we directly compare microscopic deformations in thin soft films with a thickness range, demonstrating the transition from “sink-in” to “pile-up” as the thickness of the film decreases. We also reveal an intricate difference in displacement fields for different lubrication conditions between the microindenter and soft thin film. These results demonstrate the capacity of our experimental setup as a powerful tool in understanding the unique micro-mechanical behaviors of various soft materials.
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来源期刊
Extreme Mechanics Letters
Extreme Mechanics Letters Engineering-Mechanics of Materials
CiteScore
9.20
自引率
4.30%
发文量
179
审稿时长
45 days
期刊介绍: Extreme Mechanics Letters (EML) enables rapid communication of research that highlights the role of mechanics in multi-disciplinary areas across materials science, physics, chemistry, biology, medicine and engineering. Emphasis is on the impact, depth and originality of new concepts, methods and observations at the forefront of applied sciences.
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