On controlling preload and estimating anti-loosening performance in threaded fasteners based on accurate contact modeling.pdfVIP

下载本文档

8
0
约5.17万字
约 11页
2017-03-16 发布于天津
举报
版权申诉

On controlling preload and estimating anti-loosening performance in threaded fasteners based on accurate contact modeling.pdf

1、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。。
2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
4、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
5、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
6、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
7、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

Tribology International 95 (2016) 181–191 Contents lists available at ScienceDirect Tribology International journal homepage: /locate/triboint On controlling preload and estimating anti-loosening performance in threaded fasteners based on accurate contact modeling Linbo Zhu a, Jun Hong a,n,1, Xiangjun Jianga,b a State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, PR China b Key Laboratory of Electronic Equipment Structural Design, Xidian University, Xian 710071, PR China article info Article history: Received 23 December 2014 Received in revised form 3 October 2015 Accepted 3 November 2015 Available online 10 November 2015 Keywords: Threaded fasteners Torque–preload relationship Friction torque Contact pressure abstract This paper proposed torque–preload formulas to control preload and estimate anti-loosening performance in threaded fasteners based on accurate contact modeling. To avoid the error introduced by assumptions about traditional contact pressure, the contact modeling on underhead and thread surfaces was treated as punch problems for getting the actual contact pressure. Three different coordinate systems were applied to characterize the change history of the direction of friction forces, and symbol integration was then utilized to conduct the torque–preload relationship. The in?uences of main parameters on torque–preload relationship under tightening and loosening were discussed. Experimental veri?cation was also conducted showing that the suggested approach is a better choice to precisely control preload and estimate anti-loosening performance in threaded fasteners. 2015 Elsevier Ltd. All rights reserved. 1. Introduction Threaded fasteners have been widely used in mechanical structures for the assembly of multiple parts and facilitate disassembly, such as nuclear, aerospace, automotive, pressure vessels and piping, machine tool, etc. The level and the stability of the preload in fastener, which is usually