关键词: ABAQUS/Explicit, PCB, 稳定时间极限, 能量平衡, 冲击载荷

Abstract:

The theories of central difference arithmetic,stable time'slimit and the theory of energy balance were analyzed systematically,the impact of stable time's limit and energy balance due to
mechanical parameters of materials such as stiffness,density and mesh
density was researched.Then a finite element model was built and the method of
Wheatstone bridge was used to validate model's accuracy.Finally,a detail research on PCB collision was made based on the experiments and simulation,it indicates
that ABAQUS/Explicit can deal with the impact load precisely.The calculation cost will be reduced and the precision will be satisfied as well by applying the theory of energy balance,the strength of the packaging meets the reliability requirements of PCB.

Key words: ABAQUS/Explicit, printed-circuit-board(PCB), stable time limit, theory of energy balance, impact load