在機械設計中常見到利用干涉配合來傳遞負載，其原理是利用軸、孔件變形產生的接觸壓力來傳遞扭矩。本研究分析配合件的應力分量變化時納入負載直接對於軸孔件產生的剪應力與孔件斷面之外力，並考量粗糙度與溫度造成的影響。基於在孔件內、外徑比例與負載不同條件下元件最先產生降伏位置的不同，本文依據材料強度推算最大臨界干涉量。容差設計的部分則是透過容差靈敏度分析了解設計干涉量變動範圍並且推算配合件所能傳遞之負載範圍。此外本研究利用電腦輔助工具建立輸出、入介面，並在設計範例中說明操作要點。

Interference fits have been widely applied to mechanical design. They are often used to transfer load through the friction force between each pair of shaft and hub. In studying the stress exerted on the components, this work includes the share and bending stresses directly derived from the external loads besides the radial and tangential stresses due to the interference. Moreover, the influence of rough surface, temperature and stress concentration factors have been taken into account. It has been observed that the failure of a fit occurred at different radial position when loads varied. The maximum amount of interference is derived under the constraint that the resultant stress anywhere in a fit does not reach the yielding condition. For tolerance design, this research uses sensitivity analysis to study the permissible range of dimensions for a given load. Finally, this work utilizes computer aided tool to create a design interface for interference fits, which is explained with an illustrative example.

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