Abstract
In this work, finite element simulations were performed to investigate the competition between bonding and rebounding when a Cu particle of 25 μm in diameter impinged Cu substrate. With the help of cohesive zone model, the trend of the minimal average bonding strength to suppress rebounding (MABSSR) was predicted as a function of initial velocity under certain conditions. Result shows, MABSSR has a nonlinear trend versus initial velocity under the conditions considered. If the real trend of MABSSR is similar to that observed, a hypothesis is presented to explain the critical deposition velocity. Finally, defects in the current work are discussed. Analysis shows the defects have no influence on predicting the overall trend of MABSSR in the current work.
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Abbreviations
- MABSSR:
-
Minimal average bonding strength to suppress rebounding
- D p :
-
Diameter of particle
- σn :
-
Normal stress at one node
- σs :
-
Shear stress at one node
- NFLS :
-
Normal failure stress (input parameter)
- SFLS :
-
Shear failure stress (input parameter)
- δc :
-
Critical failure distance (input parameter in cohesive zone model)
- RBSCDI:
-
Real bonding strength created during the impact
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Acknowledgments
The authors would like to gratefully thank the Supercomputing Center of Chinese Academy of Sciences for offering computing resources. James Kennedy in LS-DYNA user group on Yahoo is gratefully acknowledged for offering advice about the choice between 3D simulation and 2D axisymmetric simulation as well as between different 3D meshes. The financial support of National Natural Science Foundation of China (No. 50971127) and (No. 50902131) are also gratefully acknowledged.
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This article is an invited paper selected from presentations at the 2014 International Thermal Spray Conference, held May 21-23, 2014, in Barcelona, Spain, and has been expanded from the original presentation.
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Wang, K., Kong, L., Tao, Y. et al. Numerical Simulation of Minimal Average Bonding Strength to Suppress Rebounding in Cold Spraying Cu/Cu: A Preliminary Study. J Therm Spray Tech 24, 75–85 (2015). https://doi.org/10.1007/s11666-014-0150-x
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DOI: https://doi.org/10.1007/s11666-014-0150-x