著者
木村 成竹 泉 聡志 酒井 信介
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集 A編 (ISSN:03875008)
巻号頁・発行日
vol.73, no.734, pp.1105-1110, 2007-10-25 (Released:2011-03-02)
参考文献数
6
被引用文献数
4 4

A spring washer is widely used as a method for preventing loosening. However, experimental results presented by Sakai and Yamamoto et al., show that the performance of a spring washer as a loosening prevention mechanism is at best equal to that of a washer-less joint, if not worse. In this paper we analyzed loosening under shear loading and as a result were able to explain the mechanism that accelerates loosening in the framework of the three-dimensional finite element method (FEM). A spring washer causes non-uniformity of contact pressure at the washer interfaces, because of its asymmetric shape. When a bolted joint with a spring washer is subjected to shear loading, sticking area on the contact surfaces of the spring washer is limited to two corner points before the bearing surface undergoes gross slip. One of these points is on the upper surface of the spring washer and the other is on the lower surface. In this situation the nut rotation around these sticking points results in drastic loosening. We also conducted comparative simulation with Sakai's experimental results. Compared with experimental results, the bolted joint with the spring washer is easy to loosen according to the simulation results. It is believed that the difference comes from the spring washer's edge cutting into the contact surface of the nut, something not included in this simulation.

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外部データベース (DOI)

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@1_83m むしろ点接触になってゆるみが発生しやすい https://t.co/NhE3S6FVPp
@CKKCOBALT 出典: https://t.co/rYXLZnwoAd https://t.co/WFyG70IfRZ
@hekky_209 https://t.co/ImXNFfF6LM
@kikaisekkei8 ご存知でしたら失礼ですが、論文では緩み防止効果はない、とされていますね。https://t.co/tjI5leWUZY 東大による有限要素法では、むしろ緩みを促進するとも言われています。 https://t.co/GUJCmugu4X
@kagagrom @Matsu_GROM125 実験的・解析的に効果はあまりないと示され、論文も出せれてるくらいです ばね座金の軸方向荷重増減によるゆるみ止め効果わ(神奈川大学) https://t.co/mwKzQBdgGB 三次元有限要素法によるばね座金のゆるみ挙動解析(東京大学) https://t.co/fg6pdyFkA3
真実は分からんけど俺はこれ読んでからこーゆー問題にバネ座金は機能しないって思ってる https://t.co/FDsLPivMMN
根拠これなのかな? たしかに完全に潰れてれば普通のワッシャと変わらないし、少しでも浮けば接触面積減るから回りやすいってことかしら? 三次元有限要素法によるばね座金のゆるみ挙動解析 https://t.co/dH0DXA2S4S

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