螺栓結合件之螺牙應力集中改善研究

Analysis of Improving Stress Concentration on Bolt of Threaded Fastener

張晉維(Chin-Wei Chang)

指導教授 ： 蔡定江

國立臺北科技大學/機電學院/製造科技研究所/碩士(2013年)

摘要

本文針對受軸向負載螺紋接合，由於負載及邊界條件的不同，會造成應力分布不均和應力集中於某幾牙間的問題，造成螺紋局部損壞而降低螺紋件的使用壽命，根據材料勁力度變形與受力理論關係以及應力分布情況，適當的調整螺紋牙間隙，讓原先螺栓應力分布較小的地方先接觸螺帽受力，反之使原先應力集中的部分保留些許間隙隨著材料受力變形再接觸，藉此降低其應力及避免應力集中。使用ANSYS/Workbench分析且探查螺紋接觸部位的牙根應力分佈，然後建立應力均化指標作為螺紋應力分佈的參考依據

關鍵字

螺紋 ； Ansys/Workbench ； 應力分析

並列摘要

In this study, the joint is presented for the screw under axial load. As the load and different boundary conditions, the screw will have non-uniform stress or stress concentration problem of a particular few teeth. Therefore, the screw will have local damage and service life be reduced. According to material deformation and stress theory, the study appropriate modify the gap of screw. Let the place contact with the force in first where stress distribute smaller than another part. On the contrary, let the place that has a little gap to contact with the force in second where stress concentration, by this way, the life of the screw will be added. The stress distribution of the contact part of the thread root was analyzed by ANSYS/Workbench. Finally, the balance indicators of stress have been established as the reference of screw stress distribution.

並列關鍵字

Screw ； Ansys/Workbench ； Stress Analysis

參考文獻

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