Mandić Ana, Kosin Viktor, Jailin Clément, Tomičević Zvonimir, Smaniotto Benjamin, Hild François
Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia.
Université Paris-Saclay, CentraleSupélec, ENS Paris-Saclay, CNRS, LMPS-Laboratoire de Mécanique Paris-Saclay, 91190 Gif-sur-Yvette, France.
Materials (Basel). 2023 Sep 20;16(18):6300. doi: 10.3390/ma16186300.
Standard Digital Volume Correlation (DVC) approaches enable quantitative analyses of specimen deformation to be performed by measuring displacement fields between discrete states. Such frameworks are thus limited by the number of scans (due to acquisition duration). Considering only one projection per loading step, Projection-based Digital Volume Correlation (P-DVC) allows 4D (i.e., space and time) full-field measurements to be carried out over entire loading histories. The sought displacement field is decomposed over a basis of separated variables, namely, temporal and spatial modes. In the present work, the spatial modes are constructed via scan-wise DVC, and only the temporal amplitudes are sought via P-DVC. The proposed method is applied to a glass fiber mat reinforced polymer specimen containing a machined notch, subjected to in situ cyclic tension and imaged via X-ray Computed Tomography. The P-DVC enhanced DVC method employed herein enables for the quantification of damage growth over the entire loading history up to failure.
标准数字体积相关（DVC）方法通过测量离散状态之间的位移场，能够对试样变形进行定量分析。因此，此类框架受到扫描次数的限制（由于采集持续时间）。基于投影的数字体积相关（P-DVC）方法在每个加载步骤仅考虑一个投影，从而能够在整个加载历史上进行4D（即空间和时间）全场测量。所寻求的位移场在分离变量的基础上进行分解，即时间和空间模式。在本工作中，空间模式通过逐扫描DVC构建，仅通过P-DVC寻求时间振幅。所提出的方法应用于含有加工缺口的玻璃纤维毡增强聚合物试样，该试样承受原位循环拉伸并通过X射线计算机断层扫描成像。本文采用的P-DVC增强DVC方法能够在直至失效的整个加载历史上对损伤扩展进行量化。
