Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9合金粉/硅橡胶复合材料薄片的压缩行为研究  

Research into Pressed Behaviors of Fe_(73. 5)Cu_1Nb_3Si_(13. 5)B_9 Alloy Powder/Silicone Rubber Composite Sheets

作　　者：尹益辉[1] 吴菊英[1] 王沪毅[1] 高洋[1] 

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《绵阳师范学院学报》2016年第5期1-5,20,共6页Journal of Mianyang Teachers＇ College

基　　金：中国工程物理研究院重点学科项目"计算固体力学"

摘　　要：Fe_(73.5)Cu_1Nb_3Si_(13.5)B9合金粉/硅橡胶压磁复合材料是针对特种界面接触压力测量研发的新型传感材料,为了将该种材料的薄片作为传感器敏感元,需要认识薄片的力学行为.本文对该种压磁复合材料单层薄片试样和多层薄片重叠组合试样进行压缩实验和有限元数值模拟,获得了不同试样的压缩应力-应变曲线.通过对这些曲线的分析、比较,获得了如下认识:薄片的单向压缩应力-应变曲线存在近似线性段,且近似线性段具有一定的长度和足够弱的非线性程度;单层试样应力-应变曲线的近似线性段的斜率随厚度增大而减小;由厚度量级相同的若干单层重叠组成的试样,层数越多,则近似线性段的斜率越小;总厚度相同但层数不同的试样,层数越多,则近似线性段的斜率越大.以上的研究结果对于传感器设计、标定、控制及使用具有一定的指导意义.Fe73.5 CU1Nb3 Si13.5 B9 alloy powder/silicone rubber piezomagnetic composite is a newly developed sensors material for measurement of contact stresses between some special interfaces. In order to make sensitive elements of sensors from this material, it is necessary to understand the mechanical behaviors of such composite sheets. The pressure stress - strain properties of piezomagnetic sensitive material samples with different layer num- ber of sheets were researched by experiments and FEM simulations. It is indicated that the pressure stress - strain curve of a sample has a quasi linear segment and it is of certain length and small nonlinearity, the curvature of the approximate linear segment of stress - strain curve of a single layer sample decreases with its thickness increasing, that of a multi layers sample with sheets of same thickness quantity degree decreases with layer number increasing, and that of a sample with a certain thickness and different layer number increases with layer number increasing. The result is useful for design, calibration and application of interlayer pressure sensors.

关 键 词：层间压力传感器 敏感元 压磁敏感复合材料薄片 压缩应力-应变曲线 近似线性段斜率 

分 类 号：TB333[一般工业技术—材料科学与工程]