CAJ | 학술논문

提出利用数字散斑相关方法测量材料的电致伸缩性能的新方法.通过数字散斑相关方法得到面内位移,从而由几何三角关系得到离面位移,实现电致伸缩应变的测量.采用该方法对高电场作用下钛酸钡/聚氨酯复合高分子材料的电致伸缩性能进行了测量.在高电场作用下,对重复加电放电过程进行分析,得到电致伸缩应变,从而获取材料的电致伸缩系数.实验中采用双线性插值方法获取亚象素灰度值,以提高测量精度,并将结果与曲面拟合算法的计算结果进行了比较.结果表明:钛酸钡的加入提高了聚氨酯材料的电致伸缩性能;数字散斑相关方法可以有效地实现材料的电致伸缩系数的测量.该方法为电致伸缩性能的研究提供了一种有效的工具.
제출이용수자산반상관방법측량재료적전치신축성능적신방법.통과수자산반상관방법득도면내위이,종이유궤하삼각관계득도리면위이,실현전치신축응변적측량.채용해방법대고전장작용하태산패/취안지복합고분자재료적전치신축성능진행료측량.재고전장작용하,대중복가전방전과정진행분석,득도전치신축응변,종이획취재료적전치신축계수.실험중채용쌍선성삽치방법획취아상소회도치,이제고측량정도,병장결과여곡면의합산법적계산결과진행료비교.결과표명:태산패적가입제고료취안지재료적전치신축성능;수자산반상관방법가이유효지실현재료적전치신축계수적측량.해방법위전치신축성능적연구제공료일충유효적공구.
A new method for measuring the characteristic of electrostriction by a digital speckle correlation method (DSCM) is presented. The in-plane displacement is obtained by using the DSCM, and the out-plane displacement is obtained by the geometrical relation of the triangle theory. In this application, high field electrostrictive strains of barium titanate/polyurethane elastomer composite materials are measured. The electrostrictive strain is evaluated when the application of an electric field is repeated, and then the electrostrictive coefficient of the sample is obtained. To improve the measuring accuracy, the bilinear interpolation of gray value is used to obtain the sub-pixel gray value. The results are compared with those obtained from the surface fitting algorithm. The experimental results demonstrate that the electrostrictive response of polyurethane increases with the introduction of barium titanate into polyurethane. And by using the DSCM, the measurement of the characteristic of electrostriction can be done quickly and accurately. The DSCM provides an effective tool for the evaluation of electrostrictive response.