This study presents a finite-element-method analysis of the bending and thermal shock crack performance of multilayer ceramic capacitors (MLCCs) used in automobiles. The stress, strain, and heat flux values were analyzed for different MLCC structures and material parameters using three-point bending test and thermal shock test simulations. Three-dimensional modeling was performed using the actual design values of an MLCC—1005 size and 1 µF capacitance—and simulations were performed after setting the boundary and analysis conditions for the three-point bending and thermal shock tests. Based on the analyzed simulation results, the stress, strain, and heat flux values applicable to the MLCC were compared and analyzed to determine the optimum modeling parameters that could improve its reliability under harsh environmental conditions. This study was able to confirm the structural stress and strain changes, and the results were found to be useful to optimize the design of automotive MLCC devices.

这项研究对汽车中使用的多层陶瓷电容器（MLCC）的弯曲和热冲击裂纹性能进行了有限元分析。使用三点弯曲试验和热冲击试验模拟，分析了不同MLCC结构和材料参数的应力，应变和热通量值。使用MLCC的实际设计值（尺寸为1005，电容为1 µF）进行了三维建模，并在设置了三点弯曲和热冲击测试的边界和分析条件之后进行了仿真。根据分析的仿真结果，对适用于MLCC的应力，应变和热通量值进行比较和分析，以确定可以提高其在恶劣环境条件下的可靠性的最佳建模参数。