Abstract
This paper analyzes the stress of the printed circuit board (PCB) packaged by cushion materials after drop and investigates the stress of PCB under the different drop height, different cushion materials and different drop ground using ANSYS finite element software. The stress of PCB is analyzed quantitatively and qualitatively after drop, the results show: (1) The stress of the product is effected by drop height and the performance of dropping ground in a large extent; (2) The protect performance varies with the ways of cushioning packaging; (3) Within a certain range, the cushion material with smaller elastic modulus is better due to absorb the impact more energy and can bear the impact force is greater.
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