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.
Original language | English |
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Pages (from-to) | 1760-1769 |
Number of pages | 10 |
Journal | Science China: Physics, Mechanics and Astronomy |
Volume | 56 |
Issue number | 9 |
DOIs | |
Publication status | Published - Sept 2013 |
Externally published | Yes |
Keywords
- molecular dynamics
- nanoscratching
- polymer