Sequential combined thermal cycling and vibration test and simulation of printed circuit board

被引:9
|
作者
Arabi, F. [1 ]
Gracia, A. [1 ]
Deletage, J. -Y. [1 ]
Fremont, H. [1 ]
机构
[1] Univ Bordeaux, IMS Lab, UMR 5218, 351 Cours Liberat, F-33405 Talence, France
关键词
Electronic boards; Automotive environment; Printed Circuit Board (PCB); Thermal cycling; Dynamic response; Combined test; Ageing; Mechanical characterization; Thermomechanical simulation; Sine sweep vibration; Solder joint; Frequency; Acceleration; Displacement; Shaking; RELIABILITY; SOLDER; TEMPERATURE;
D O I
10.1016/j.microrel.2018.07.050
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Automotive environment generates vibration and temperature fluctuation, which can be damaging for electronic boards. Furthermore, combined temperature and vibration is a type of testing that recreates environments approximating more closely operating environments. In this paper, vibration tests are performed during thermal cycling to investigate the influence of temperature on Printed Circuit Board (PCB) responses. A combined test of temperature and vibration is designed to evaluate the PCB response after each step of one thermal cycle [-40/125] degrees C. The frequency and displacement can be linked to the strain and strain rate during a board level vibration test. They are obtained from the acceleration during a sine sweep application on a shaker, which is measured using a light weight accelerometer. Experimental results show that temperature significantly affects the PCB responses. Temperature variation leads to striking differences in vibration loading intensity. The PCB first natural frequency shifts from 328 Hz to 313 Hz with temperature increase from 25 degrees C to 125 degrees C. A complex PCB is characterized using tension and flexure tests at different temperatures, to extract user input parameter for simulations. An accurate numerical model for sequential combined thermal cycling and vibration simulation is developed and validated using experiments. Thanks to these simulations, the displacement evolution due to combined loading is possible.
引用
收藏
页码:768 / 773
页数:6
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