We propose a locking-free nonconforming finite element method to solve for the displacement variation in the pure displacement boundary value problem of planar linear elasticity. The method proposed in this paper is r...We propose a locking-free nonconforming finite element method to solve for the displacement variation in the pure displacement boundary value problem of planar linear elasticity. The method proposed in this paper is robust and optimal, in the sense that the convergence estimate in the energy is independent of the Lame parameter λ.展开更多
This paper elaborates on the magnetic forces between current carrying planar spiral coils. Direct and concentric rings methods are employed in order to calculate the magnetic force between these coils. The results obt...This paper elaborates on the magnetic forces between current carrying planar spiral coils. Direct and concentric rings methods are employed in order to calculate the magnetic force between these coils. The results obtained by two calculation methods show the efficiency of the replaced rings method in both simplicity and calculation time. Simula-tions using the Finite Element Method (FEM) are carried out to analyze the distribution of the magnetic flux density around the coils. Also, coils with precise size have been constructed and tested. The experimental results as well as the results obtained by FEM are used to validate the accuracy of the calculations.展开更多
平面柔性涡流传感器能同时独立测量电导率和提离,在应力评估、缺陷检测方面具有较大优势。文中采用有限元法仿真分析了工作频率对平面柔性涡流传感器性能的影响,在工作频率为500 k Hz时,使用所设计的平面柔性涡流传感器对铝合金3A21进...平面柔性涡流传感器能同时独立测量电导率和提离,在应力评估、缺陷检测方面具有较大优势。文中采用有限元法仿真分析了工作频率对平面柔性涡流传感器性能的影响,在工作频率为500 k Hz时,使用所设计的平面柔性涡流传感器对铝合金3A21进行了拉伸应力试验,得到铝合金电导率与拉伸应力的关系。实验结果表明,在合适的工作频率激励下,平面柔性涡流传感器能有效实现导电材料的电导率测量和应力大小的评估。展开更多
基金Supported by the NSF of the Education Henan(200510078005)
文摘We propose a locking-free nonconforming finite element method to solve for the displacement variation in the pure displacement boundary value problem of planar linear elasticity. The method proposed in this paper is robust and optimal, in the sense that the convergence estimate in the energy is independent of the Lame parameter λ.
文摘This paper elaborates on the magnetic forces between current carrying planar spiral coils. Direct and concentric rings methods are employed in order to calculate the magnetic force between these coils. The results obtained by two calculation methods show the efficiency of the replaced rings method in both simplicity and calculation time. Simula-tions using the Finite Element Method (FEM) are carried out to analyze the distribution of the magnetic flux density around the coils. Also, coils with precise size have been constructed and tested. The experimental results as well as the results obtained by FEM are used to validate the accuracy of the calculations.
文摘平面柔性涡流传感器能同时独立测量电导率和提离,在应力评估、缺陷检测方面具有较大优势。文中采用有限元法仿真分析了工作频率对平面柔性涡流传感器性能的影响,在工作频率为500 k Hz时,使用所设计的平面柔性涡流传感器对铝合金3A21进行了拉伸应力试验,得到铝合金电导率与拉伸应力的关系。实验结果表明,在合适的工作频率激励下,平面柔性涡流传感器能有效实现导电材料的电导率测量和应力大小的评估。
