In this study, a novel printed circuit board (PCB) strain-based structural design methodology for spaceborne electronics was proposed to compensate for the drawbacks of the conventional Steinberg’s theory. In addition, finite element modeling technique based on strain-based theory, which provides a reliable and rapid solution to structural design of electronics, was investigated. The effectiveness of the proposed methodology was validated through fatigue life tests of sample electronic packages mounted on PCBs with various boundary conditions. These results indicated that the proposed methodology enables more reliable evaluation on the mechanical safety of solder joints as compared with the Steinberg’s theory.

在这项研究中，提出了一种新的基于航天器电子学的基于印刷电路板（PCB）应变的结构设计方法，以弥补传统斯坦伯格理论的缺点。此外，研究了基于应变理论的有限元建模技术，该技术为电子结构设计提供了可靠而快速的解决方案。通过在各种边界条件下安装在PCB上的示例电子封装的疲劳寿命测试，验证了所提出方法的有效性。这些结果表明，与Steinberg的理论相比，所提出的方法能够对焊点的机械安全性进行更可靠的评估。