基于数字图像相关技术的铝合金拉伸应变测量

Measurement of Tensile Strain of Aluminum Alloy Based on Digital Image Correlation Technology

在传统的动力学实验中,获取位移/形变的方法都有诸多缺陷,例如无法进行全场测量,动态测量中实时响应不够及时,系统精度较低等。与传统测量方式相比,光学测量方法具有非接触、可全场测量、测量精度高、使用方便、采集数据信噪比高等优点,在实验力学中被广泛使用。本文通过基于数字图像相关技术的光学测量方法,对铝合金构件进行了拉伸应变测量,验证了该测量系统在实际应用中的精度和可靠性。

In the traditional dynamic experiment,the method of obtaining displacement/deformation has many defects,such as the inability to carry out full field measurement,the real-time response in dynamic measurement is not timely enough,and the system accuracy is low.Compared with traditional measurement methods,optical measurement methods have the advantages of non-contact,full field measurement,high measurement accuracy,convenient use and high signal-to-noise ratio of collected data.They are widely used in experimental mechanics.Through the optical measurement method based on digital image correlation technology,the tensile strain of aluminum alloy components is measured,and the accuracy and reliability of the measurement system in practical application are verified.