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夜雨聆风 > > 办公文件 > 刘鸿文《材料力学》第7版笔记和课后习题(含考研真题)

刘鸿文《材料力学》第7版笔记和课后习题(含考研真题)

当前时间： 1970-01-01 08:00:00 分类：办公文件 评论(0)
刘鸿文《材料力学》第7版笔记和课后习题(含考研真题)

第3章 扭转

3.1 复习笔记

扭转是杆件的基本变形之一，它是由大小相等，方向相反，作用线都垂直于杆轴的两个力偶引起的，表现为杆件的任意两个截面发生绕轴线的相对转动。

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  1. CONNECT:[ UseTime:0.000644s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000940s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000931s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000270s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000603s ]
  6. SELECT * FROM `set` [ RunTime:0.000194s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000685s ]
  8. SELECT * FROM `article` WHERE `id` = 791104 LIMIT 1 [ RunTime:0.000406s ]
  9. UPDATE `article` SET `lasttime` = 1782304761 WHERE `id` = 791104 [ RunTime:0.002830s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000339s ]
  11. SELECT * FROM `article` WHERE `id` < 791104 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000531s ]
  12. SELECT * FROM `article` WHERE `id` > 791104 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000424s ]
  13. SELECT * FROM `article` WHERE `id` < 791104 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001236s ]
  14. SELECT * FROM `article` WHERE `id` < 791104 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000693s ]
  15. SELECT * FROM `article` WHERE `id` < 791104 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006226s ]
0.099668s