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工程力学  2014 

功能梯度压电压磁球对称问题的静力响应

DOI: 10.6052/j.issn.1000-4750.2012.12.0937, PP. 56-63

Keywords: 功能梯度材料,压电压磁材料,球状传感器制动器,球对称问题,解析解

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Abstract:

研究径向载荷作用下功能梯度压电压磁空心球壳的空间球对称电磁弹耦合静力学问题。假设压电压磁空心球壳的材料参数沿球厚度方向呈幂函数分布,在球坐标系下,由材料的参数方程、本构方程、几何方程和平衡方程导出在外激励作用下空心球壳体的应力、电势、磁势等物理量的解析解。结构内表面材料设为常用BaTiO3-CoFeO4复合材料,分别对球壳内表面受力以及内外表面存在电势差或磁势差的情况进行数值讨论,分别给出不同梯度参数下结构内部径向应力、环向应力、电势和磁势的分布。结果表明梯度参数的选取对功能梯度压电压磁球壳的性能有很大的影响。

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