A Calibration Method of Micropillar Compression Testing for Taper and Eccentricity Induced Errors
A Calibration Method of Micropillar Compression Testing for Taper and Eccentricity Induced Errors
复制标题
锥度和偏心误差微柱压缩测试的校准方法
DOI：
10.1109/tim.2021.3107042
复制
发表时间：
2021
影响因子：
5.6
通讯作者：
Ren Luquan
中科院分区：
文献类型：
--
作者：
Zhang Wei;Ma Zhichao;Zhao Hongwei;Ren Luquan
Errors induced by pillar taper and eccentric load in micropillar compression experiments have seldom been investigated, although they significantly affect the measurement accuracy, especially in the testing of specimens in a micrometer and nanometer size. A novel calibration method related to stress–strain responses in micropillar compression testing was proposed in this study to eliminate this kind of errors. Axial load and eccentric load were applied to high-entropy alloy (HEA) pillars with taper angles of 1°, 2°, and 3°, respectively, and the measured stress–strain curves were corrected by the proposed calibration method. The results revealed that the difference of the corrected curves with different tapers or eccentricities was smaller than the measured curves. The errors induced by the taper and eccentric load increased with the taper angle and eccentricity. In addition, the difference between measured and corrected flow stresses increased with the taper angle, which was essentially consistent with the results from the calibration method.
