Abstract
Molecular dynamic simulations are performed to study the nanoscratching behavior of polymers. The effects of scratching depth, scratching velocity and indenter/polymer interaction strength are investigated. It is found that polymer material in the scratching zone around the indenter can be removed in a ductile manner as the local temperature in the scratching zone exceeds glass transition temperature T g . The recovery of polymer can be more significant when the temperature approaches or exceeds T g . The tangential force, normal force and friction coefficient increase as the scratching depth increases. A larger scratching velocity leads to more material deformation and higher pile-up. The tangential force and normal force are larger for a larger scratching velocity whereas the friction coefficient is almost independent of the scratching velocities studied. It is also found that stronger indenter/polymer interaction strength results in a larger tangential force and friction coefficient.
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Yuan, D., Zhu, P., Fang, F. et al. Study of nanoscratching of polymers by using molecular dynamics simulations. Sci. China Phys. Mech. Astron. 56, 1760–1769 (2013). https://doi.org/10.1007/s11433-013-5286-z
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DOI: https://doi.org/10.1007/s11433-013-5286-z