Advancement of Optical Methods in Experimental Mechanics, Volume 3
Advancement of Optical Methods in Experimental Mechanics, Volume 3
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实验力学中光学方法的进展，第 3 卷
DOI：
10.1007/978-3-319-41600-7_23
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Davis F
中科院分区：
文献类型：
--
作者：
Davis F
在飞机和汽车部件中，聚合物材料（如PMMA）承受动态载荷并在中等（1 - 100 s−1）和高应变率（bbb102s−1）下变形。本文提出了一种计算高应变率下PMMA应变率相关参数的方法。在惯性冲击试验中，利用超高速摄像机采集各试样变形的图像，记录速度为3mfps。将全场位移、应变和加速度输入到虚拟场法中，对材料参数进行反辨识。
In aircraft and automotive components, polymeric materials such as PMMA are subjected to dynamic loading and deform at moderate (1–100 s−1) and high strain rates (>102s−1). A methodology for calculating the strain-rate dependent parameters of PMMA at high strain rates will be presented. Images of each sample deforming were collected during an inertial impact test with an ultra-high speed camera, recording at 3 Mfps. The full field displacement, strain, and acceleration were input to the virtual fields method to perform an inverse identification of the material parameters.