Time dependence of mesoscopic strain distribution for triaxial woven carbon-fiber-reinforced polymer under creep loading measured by digital image correlation
Time dependence of mesoscopic strain distribution for triaxial woven carbon-fiber-reinforced polymer under creep loading measured by digital image correlation
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DOI：
10.1007/s11043-016-9292-1
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发表时间：
2016-01
影响因子：
2.5
通讯作者：
J. Koyanagi;Hideo Nagayama;S. Yoneyama;T. Aoki
中科院分区：
文献类型：
--
作者：
J. Koyanagi;Hideo Nagayama;S. Yoneyama;T. Aoki
本文提出了一个三轴编织碳纤维增强聚合物蠕变载荷下的介观应变的时间依赖性，使用数字图像相关（DIC）测量。两种类型的DIC技术的测量：传统的子集DIC和网格DIC。进行了静态拉伸和蠕变试验，并通过应用这些技术研究了细观应变分布的时间依赖性。这种材料的最终失效是由相对刚性转动和相应的剪应力引起的束间脱粘所决定的。因此，本研究重点关注这些问题。在蠕变试验过程中，纤维的方向应变，剪切应变，和旋转使用DIC监测，并在试样的宏观应变随时间的增加的机制进行了研究的基础上获得的结果DIC测量。
This paper presents the time dependence of the mesoscopic strain of a triaxial woven carbon-fiber-reinforced polymer under creep loading measured using digital image correlation (DIC). Two types of DIC techniques were employed for the measurement: conventional subset DIC and mesh DIC. Static tensile and creep tests were carried out, and the time dependence of the mesoscopic strain distribution was investigated by applying these techniques. The ultimate failure of this material is dominated by inter-bundle decohesion caused by relative rigid rotation and relating shear stress. Therefore, these were focused on in the present study. During the creep tests, the fiber directional strain, shear strain, and rotation were monitored using the DIC, and the mechanism for the increase in the specimen’s macro-strain over time was investigated based on the results obtained by the DIC measurement.