Applying viscoplastic constitutive models to predict ratcheting behavior of sintered nanosilver lap-shear joint

Gang Chen, Ze Sheng Zhang, Yun Hui Mei, Xin Li, Dun Ji Yu, Lei Wang, Xu Chen

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

A series of displacement-controlled tests were conducted for sintered nanosilver lap-shear joints at different loading rates and temperatures. The relationship between force and displacement was studied. It was found that higher loading rate or lower temperature caused higher stress-strain response of the sintered nanosilver joint. Force-controlled cyclic tests were also performed at different mean forces, force amplitudes, dwell time at peak force, and temperatures. The mean force, the force amplitude, and the temperature played key roles in the shear ratcheting strain accumulation. The ratcheting strain rate could be enhanced with increasing the dwell time at peak force as well. A viscoplastic constitutive model based on Ohno-Wang and Armstrong-Fedrick (OW-AF) non-linear kinematic hardening rule, and Anand model were separately embedded in ABAQUS to simulate the shear and the ratcheting behavior of the sintered nanosilver joint. It was concluded that OW-AF model could predict the ratcheting behavior of the sintered nanosilver joint better than Anand model, especially at high temperatures.

Original languageEnglish
Pages (from-to)61-71
Number of pages11
JournalMechanics of Materials
Volume72
DOIs
StatePublished - May 2014
Externally publishedYes

Funding

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 11172202, No. 61334010) and Program for New Century Excellent Talents in University (NCET-13-0400) of China.

Keywords

  • Anand model
  • Cyclic shear
  • Electronic packaging
  • OW-AF model
  • Ratcheting

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