摘要
对外加直流电场作用下电流变液的拉伸、压缩和剪切特性进行了实验研究。实验结果表明,在外电场作用下,电流变液的压缩强度比剪切强度约高一个数量级,压缩强度是拉伸强度的2～3倍。压缩弹性模量约与压缩过程中电场强度的三次方成正比。压缩应力与电流变液本身性能、外加电压大小和压缩应变都有密切关系。拉伸屈服应力为剪切屈服应力的拉伸屈服应力和剪切屈服应力的3～4倍,据此计算得到剪切屈服应变角度在15°～18.5°之间。
The elongation, compression and shearing characteristics of ER fluids under external electric fields are investigated, The compressive strength of ER fluids is found to be about one order higher than shear stress, and is 2-3 times of tensile strength. The compressive modulus is proportional to the square of electric field. The relationship between tensile yield stress and shear yield stress verified the credibility of the calculation model employing a yield angle shaped between particles. From the tested strength, the yield angle is found to be between 15°-18.5°, according with other reports well and verifying the validity of the calculation through particle shift in traditional theoretical analysis.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2003年第1期91-95,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金重点项目(50202010)
