数字图像相关法在稀土掺杂水凝胶电响应行为测量中的应用

Application of Digital Image Correlation Method in Measuring Stimuli-Response of Rare-Earth Hybrid Hydrogels Under Direct Current Electric Field

基于放大成像技术、高速摄像技术与数字图像相关方法,研究了稀土掺杂水凝胶在非接触直流电场作用下的电刺激响应行为,并对相关的机理进行了探讨。实验结果表明,在非接触直流电场作用下,掺入稀土后的Sm/Gel/P(AA/AM)、Eu/Gel/P(AA/AM)水凝胶与Gel/P(AA/AM)水凝胶相比,对电场的响应更为敏感;稀土掺杂水凝胶均随着电场的增大,形变位移增大;水凝胶在掺杂稀土后沿着电场方向产生形变,在掺杂稀土前逆着电场方向产生形变。文中测试方法具有实验装置简单、全场非接触、无附加质量、无附加阻尼、测量变形范围可调等优点。数字图像相关方法用于此类材料力学性能的研究是一种行之有效的方法。

Magnified imaging technique and the high speed camera armed and digital image correlation method （DICM） were employed to study the stimuli-response of rare-earth hybrid hydrogels under non-contact direct current electric field,and their correlated mechanism was also discussed. Experimental results show that,compared with gel/P（AA/AM） hydrogel,the Sm/gel/P（AA/AM） and Eu/Gel/P（AA/AM） hydrogels hybrized with rare-earth are more sensitively and intensively responsive to electric field in the non-contact direct current electric field. The deformation displacement of rare-earth hybrid hydrogels increases with the intensity of electric field. In the rare-earth hybrid hydrogel product,the deformation displacement moves along the electric field. The formation displacement in hydrogel product without rare-earth hybrid is against the direction of electric field. This technique has the advantages of being simple,whole-field,and non-contact. It does not add additional weight or damping and can be adjusted to different ranges of displacements.The result also indicates that digital speckle correlation method （DSCM） is a feasible method in the study of the mechanical behavior of similar material of this kind.