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<p>This study examined the impact of sliding speed on the wear process of brass by integrating thermodynamic principles with molecular dynamics simulation. The simulation findings indicate that as the sliding speed increases, the strain rate of the workpiece rises while the tensile stress decreases and the compressive stress increases. Consequently, the tangential force remains constant regardless of sliding speed, whereas the normal force increases with higher speeds. Additionally, the temperature of the workpiece rises with increasing sliding speed, leading to a more significant thermal softening effect. Due to the interplay between strain rate hardening and thermal softening, the wear of the workpiece initially decreases and then increases as the sliding speed continues to rise. The specific wear rate, specific wear amount, and degradation coefficient all decrease with increasing sliding speed, suggesting that cutting becomes more challenging at higher speeds. Therefore, careful consideration is necessary when selecting the cutting speed to achieve efficient machining. This study serves as a valuable reference for the machining of metal materials.</p>

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A Thermodynamic Insight into the Speed Dependence of Brass Sliding Wear Process

  • 期刊论文

  • 发表日期：

    2025年11月4日

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  • Kai Chen,
  • Shuaishuai Zeng,
  • Xiang Li,
  • Dongdong Zhou,
  • Xianfa Li,
  • Yi Liu

摘要

This study examined the impact of sliding speed on the wear process of brass by integrating thermodynamic principles with molecular dynamics simulation. The simulation findings indicate that as the sliding speed increases, the strain rate of the workpiece rises while the tensile stress decreases and the compressive stress increases. Consequently, the tangential force remains constant regardless of sliding speed, whereas the normal force increases with higher speeds. Additionally, the temperature of the workpiece rises with increasing sliding speed, leading to a more significant thermal softening effect. Due to the interplay between strain rate hardening and thermal softening, the wear of the workpiece initially decreases and then increases as the sliding speed continues to rise. The specific wear rate, specific wear amount, and degradation coefficient all decrease with increasing sliding speed, suggesting that cutting becomes more challenging at higher speeds. Therefore, careful consideration is necessary when selecting the cutting speed to achieve efficient machining. This study serves as a valuable reference for the machining of metal materials.