一、切削力的来源和分解 1、来源 塑性变形（Plastic deformation） 弹性变形（Elastic deformation） 摩擦力（Frication） 切削力-金属切削时，刀具切入工件， 使被加工材料发生变形成为切屑所需的力。
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frication drag 摩擦阻力
internal frication character 内耗特性
coefficient of coulomb frication 库伦摩擦系数
side frication 侧摩阻力
multi-plate frication clutch 多片摩擦离合器
Magnetic bearing have many advantages such as no frication, no wear, no lubricant equipment and long service life, they are now moving beyond promise into actual service in such applications as aircraft, electric power generation, high speed and high precision machine tool, petroleum refining and robots.
磁浮轴承具有无摩擦、无磨损、无需润滑、寿命长等优点,可以适应复杂恶劣环境,在军工、航空航天、发电机组、超高速超精密加工机床、原油加工及机器人等领域具有广阔的应用前景。
参考来源 - 磁浮轴承的试验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The static frication coefficient does not simply decrease with the increase of load.
静摩擦系数不是简单的随载荷的增加而减小。
The effects of frication, air frication on the speed and trajectory of projectiles have been fully considered.
主要考虑了摩擦力、空气阻力等因素对弹丸的速度和轨迹的影响。
Our hair looks even much more dim and dull after the winter than our skin, because the static causes the dryness and frication.
冬天结束后，我们的头发常常因为静电所致会看起来比肤色更暗淡，干燥。
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