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首页> 外文期刊>International journal of mechanics and materials in design >Noncontact spatiotemporal strain mapping of composite multiferroic cylinders
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Noncontact spatiotemporal strain mapping of composite multiferroic cylinders

机译：复合多体气缸的非接触式时尚应变映射

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Recently, the reinvigoration of research interest in in strain-mediated composite multiferroic structures resulted in translational magnetoelectric devices with superior performance than their traditional counterparts. Full-filed measurements and visualization of mechanical strain, with a focus at the interface, offer new possibilities for the advancement of magnetoelectric devices regardless of the material system. Here, we report spatiotemporal strain maps of composite magnetoelectric cylinders using a novel approach combining stable laser ultrasonic vibrometer and 2D motion system measurement technique. The physical measurement technique is augmented with a robust analysis algorithm that capable of effectively and consistently detect the interface. With the spatiotemporal maps, we forecast additional utility through the concurrent extraction of polarization and magnetization maps; hence highlighting the complex interactions between the involved order parameters. Understanding the converse magnetoelectric response in strain-mediated composite multiferroics is essential for the development of devices such and motors, antennas, and wireless power transferors. Given the dependence of the converse magnetoelectric response on the strain generation and transduction, mapping the mechanical response is essential for advancement of efficient devices. This mapping approach is challenging due to the dynamic nature of the response as well as the magneto-electro-mechanical coupling. Spatiotemporal maps of in-plane and out-of plane displacement and strain components were measured concurrently off the surface of a composite structure. To generate spatiotemporal strain maps, a laser-ultrasonic vibrometer mounted on a 2D gantry system was employed to map the in-plane and out-of-plane displacement components of a strain-mediated, concentric multiferroic composite cylinder. The strain maps provided insights on the behavior of the strain mediation mechanisms within the investigated composite structure including amplification of the strain due to the disparity in the mechanical properties of the constituents, which will result in a non-uniform distribution of magnetization and polarization responses. Additionally, the method to calculate the strain maps was shown to be robust for different spatial measurement resolutions.
机译：最近，在应变介导的复合材料中的研究兴趣的重新加入研究磁电装置，其性能优于其传统的对应物。具有焦点在界面的机械应变的全归档测量和可视化，提供了磁电器件的推进的新可能性，而不管材料系统如何。在这里，我们使用一种组合稳定激光超声波振动器和2D运动系统测量技术的新方法报告复合磁电缸的时空磁柱映射。使用强大的分析算法增强物理测量技术，其能够有效且一致地检测界面。通过时空地图，我们通过同时提取极化和磁化图预测额外的实用性;因此，突出显示所涉及的订单参数之间的复杂相互作用。了解应变介导的复合多法中的逆磁电反应对于开发器件，电动机，天线和无线电力传输器是必不可少的。鉴于逆磁电反应对应变产生和转导的依赖性，映射机械响应对于高效设备的进步至关重要。由于响应的动态性以及磁机电耦合，这种映射方法是具有挑战性的。在复合结构的表面上同时测量平面内和外平面位移和应变成分的时空映射。为了产生时空应变映射，采用安装在2D台架系统上的激光超声波振动计来映射应变介导的同心多体型复合圆筒的平面内和外平面外位移组分。应变图提供了对所研究的复合结构内的应变调节机制的行为的洞察，包括由于组分的机械性能的差异而导致菌株的扩增，这将导致磁化和极化响应的不均匀分布。另外，对于不同的空间测量分辨率，显示了计算应变映射的方法是坚固的。

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