Tian Nan, Wang Tingting, Tu Xiaoqing, Shui Yue, Ju Jianzhu, Sun Guangai, Liu Dong
MOE Key Laboratory of Space Applied Physics and Chemistry, Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China.
Key Laboratory of Neutron Physics and Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, 621999 Mianyang, China.
Rev Sci Instrum. 2020 Jan 1;91(1):015113. doi: 10.1063/1.5128047.
A tensile machine is designed for in situ scattering investigation of elastomers in the cyclic tensile process. The specimen is stretched by two linearly moving clamps in the opposite direction; thus, the center of the specimen is kept stationary during the tensile test. With this configuration, either X-ray scattering or neutron scattering can be carried out easily. A high speed direct current motor is used to drive the machine, providing a wide tensile speed range from 1.28 × 10 mm/s to 102.4 mm/s. Cyclic tension is achieved by program controlled motor rotation, and the engineering stress-strain curve can be saved automatically in each cycle. Moreover, an independent displacement sensor is used to check the possible accumulative error of position during cyclic tension. The orientation change of multiwall carbon nanotube filled silicon rubber is investigated by small angle neutron scattering to test the machine, which shows that the machine is capable of combining the cyclic tensile test with in situ scattering measurement.
一种拉伸机被设计用于在循环拉伸过程中对弹性体进行原位散射研究。试样由两个沿相反方向线性移动的夹具拉伸；因此，在拉伸试验过程中试样的中心保持静止。采用这种配置，可以轻松地进行X射线散射或中子散射。使用高速直流电机驱动该机器，提供从1.28×10 mm/s到102.4 mm/s的宽拉伸速度范围。通过程序控制电机旋转实现循环拉伸，并且工程应力-应变曲线可以在每个循环中自动保存。此外，使用独立的位移传感器来检查循环拉伸过程中可能的位置累积误差。通过小角中子散射研究了多壁碳纳米管填充硅橡胶的取向变化以测试该机器，结果表明该机器能够将循环拉伸试验与原位散射测量相结合。
