Mechanics Based Tomography (MBT): Validation using experimental data
Mechanics Based Tomography (MBT): Validation using experimental data
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DOI：
10.1016/j.jmps.2020.104187
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发表时间：
2021
影响因子：
5.3
通讯作者：
S. Goenezen;Baik Jin Kim;M. Kotecha;Ping Luo;M. Hematiyan
中科院分区：
文献类型：
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作者：
S. Goenezen;Baik Jin Kim;M. Kotecha;Ping Luo;M. Hematiyan
基于断层摄影的成像被用于各种学科中，其中最广为人知的是计算机断层摄影（CT）。一般来说，它们的共同点是在样品的表面上和多个位置处测量信号，以使用特定于应用的本构方程来重建某种类型的材料特性分布。在本文中，并首次与实验验证，一种新的层析成像方法成功地介绍了固体力学的基础上。它利用平衡方程的核心嵌入在一个优化框架，以控制这些问题的不适定性。测量信号是从具有照相机的数字图像相关系统获得的变形场。这项工作展示了基于力学的断层扫描（MBT）在复合有机硅材料上的潜力。这项工作鼓励研究MBT作为乳腺肿瘤筛查工具，根据其硬度对比可视化肿瘤。另一个长期目标可能是研究使用这种方法作为土木工程结构（如桥梁）的非破坏性测试工具。最后，这种新的方法可以潜在地与立体镜小型化，并扩展到映射在微观结构，例如晶粒长度尺度的材料性能分布。
Tomography based imaging is used in various disciplines with the most widely known as computed tomography (CT). In general, they have in common that a signal is measured on the specimen's surface and at multiple locations to reconstruct some type of a material property distribution using application specific constitutive equations. In this paper and for the first time with experimental validation, a novel tomography approach is successfully introduced based on the mechanics of solids. It utilizes the equations of equilibrium at its core embedded in an optimization framework to control the ill-posed nature of these problems. Measured signals are deformation fields obtained from a digital image correlation system with photo cameras. This work demonstrates the potential of mechanics based tomography (MBT) on a composite silicone material. This work encourages to investigate MBT as a breast tumor screening tool to visualize tumors based on their stiffness contrast. Another long-term goal could be to investigate the use of this methodology as a non-destructive testing tool for civil engineering structures such as bridges. Finally, this new methodology could potentially be miniaturized with stereoscopes and extended to map the material property distribution at the microstructure, e.g. grain length-scale.