1 / 4

第 5 章 摩 擦

★. 第 5 章 摩 擦. 概念：滑动摩擦；滚动摩阻 § 5-1 滑动摩擦力和摩擦定律 — 古典摩擦理论 静摩擦定律 动摩擦定律 § 5-2 摩擦角和自锁现象 例 1 例 2 § 5-3 有滑动摩擦时的平衡问题举例. 返回. 静摩擦定律. 1. 0 ≤ F ≤ F max. 2. F max = f N. 注意： 在 0 ≤ F ≤ F max 范围内，静摩擦力 F 的大小与方向由切向主动力决定。. 动摩擦定律. F' = f 'N.

ally
Download Presentation

第 5 章 摩 擦

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ★ 第 5 章 摩 擦 • 概念：滑动摩擦；滚动摩阻 • §5-1 滑动摩擦力和摩擦定律 —古典摩擦理论 • 静摩擦定律 • 动摩擦定律 • §5-2 摩擦角和自锁现象 • 例1 • 例2 • §5-3 有滑动摩擦时的平衡问题举例 返回

  2. 静摩擦定律 1. 0 ≤ F ≤ Fmax 2. Fmax = f N 注意： 在 0 ≤ F ≤ F max范围内，静摩擦力 F 的大小与方向由切向主动力决定。

  3. 动摩擦定律 F'= f 'N • 动摩擦系数 f'略小于静摩擦系数 f • 关系式 F' = f 'N恒成立

  4. Qy F Qx N N N N   Fmax F Fmax Fmax 摩擦角和自锁现象 tg  = Fmax / N = f 必能平衡！ 必不能平衡！

More Related