Study on the failure behavior of nanoparticle-based silver wires based on an electromechanical coupling cohesive zone model
WEI Shupeng
YI Chuanshuai
SUN Quan
LU Yebo
Abstract：[Objective]To investigate the influence of the microstructure of nanoparticle silver wires on their mechanical and electrical properties,finite element modeling of the microstructure of silver wires was conducted.A force-electric coupling cohesive zone model was established to simulate and analyze the effect of multiscale nanoparticle size distribution on the bend-ing fatigue resistance of silver wires.[Methods]Firstly,a random circular packing algorithm was developed to perform stochastic packing modeling of nanoparticles generated based on a normal distribution,enabling finite element modeling of silver wires with different microstructures.Secondly,a force-electric coupling cohesive zone model was employed to character-ize the mechanical and electrical damage behavior at particle interfaces.Finally,numerical implementation was carried out using the UEL subroutine in Abaqus software.Finite element simulations were conducted to study the effects of average particle size,particle size standard deviation,and bimodal particle size distribution on the resistance variation and service life of nanoparticle silver wires during fatigue loading.[Results]The results indicate that the bending fatigue resistance of silver wires significantly improves with increasing particle size standard deviation,while changes in average particle size have a minor effect on performance.For silver wires with bimodal particle size distributions,small particles effectively enhance bend-ing fatigue resistance by filling the gaps between large particles.However,as the proportion of small particles increases,the performance improvement gradually diminishes.Additionally,an increase in the size of small particles impedes effective bond-ing between large particles,thereby reducing the enhancement effect on the bending fatigue resistance of silver wires.
Keywords：NanoparticleMulti-scale distributionCohesive zone modelElectrical damageFatigue
Publication Date：2026-01-31
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：10( 1-10 )