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提高軸疲勞強度的結構措施

2014-03-19 16:53 作者:admin 來源:未知 瀏覽: 字號:

摘要:2 提高軸疲勞強度的結構措施 軸的破壞多屬于疲勞破壞。在軸的截面變化處 (如軸肩、鍵槽、橫孔、環槽等),會產生應力集中, 因此軸的疲勞破壞多發生在這些部位。所以設計軸的 結構時應力求降低應力集中。表12.2-3列出了降低 軸上應力集中的主要措施。 由于軸

2 提高軸疲勞強度的結構措施
    軸的破壞多屬于疲勞破壞。在軸的截面變化處
(如軸肩、鍵槽、橫孔、環槽等),會產生應力集中,
因此軸的疲勞破壞多發生在這些部位。所以設計軸的
結構時應力求降低應力集中。表12.2-3列出了降低
軸上應力集中的主要措施。
    由于軸表面的工作應力最大,提高軸的表面質量
也是提高軸的疲勞強度的有力措施。提高軸的表面質
量包括減小軸的表面粗糙度,對軸表面進行處理,如
熱處理,機械處理和化學處理等,都能達到提高軸的
疲勞強度的目的。
表12.2一3降低軸應力集中的主要措施舉例

降低軸應力集中的主要措施舉例表1
降低軸應力集中的主要措施舉例表2
(責任編輯:laugh521521)
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