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- 2018
含孔洞缺陷复合材料的压阻效应
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Abstract:
以康铜材料为例，将具有孔洞的不均匀复合材料的平均应力和平均电阻率之间的关系由均质材料的应力和电阻率关系代替，运用有限元方法和均匀化方法计算了含孔洞正方形板的初始电阻率和压阻系数。结果发现：康铜材料的初始电阻率和压阻系数π11和π22均随着孔洞体分比的增大而增大，压阻系数π12和π21反而随着孔洞体分比的增大而减小，其中，三角形孔洞对康铜材料的初始电阻率和压阻系数影响最大。 The effect of holes on initial electrical resistivity and piezoresistive coefficients was investigated by taking constantan as an example. The relationship between average stresses and average electrical resistivity of an inhomogeneous composites with holes was replaced by that of a homogeneous material. The homogenization method was used to calculate initial electrical resistivity and piezoresistive coefficients of a square plate with holes. The conclusions can be summarized as follows. Initial electrical resistivity and piezoresistive coefficients π11, π22 of constantan material increase with the increase of volume fraction of holes, and piezoresistive coefficients π12, π21 decrease. Effect of triangle holes on initial electrical resistivity and piezoresistive coefficients of constantan material is the most obvious. 国家自然科学基金（11472020）
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