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contributor authorMing Zhang
contributor authorChu-Hwa Lee
contributor authorYanyao Jiang
date accessioned2017-05-09T00:25:12Z
date available2017-05-09T00:25:12Z
date copyrightFebruary, 2007
date issued2007
identifier issn1050-0472
identifier otherJMDEDB-27842#218_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/136529
description abstractA three-dimensional finite element (FE) model with the consideration of the helix angle of the threads was developed to simulate the second stage self-loosening of a bolted joint. The second stage self-loosening refers to the gradual reduction in clamping force due to the back-off of the nut. The simulations were conducted for two plates jointed by a bolt and a nut and the joint was subjected to transverse or shear loading. An M12×1.75 bolt was used. The application of the preload was simulated by using an orthogonal temperature expansion method. FE simulations were conducted for several loading conditions with different preloads and relative displacements between the two clamped plates. It was found that due to the application of the cyclic transverse load, microslip occurred between the contacting surfaces of the engaged threads of the bolt and the nut. In addition, a cyclic bending moment was introduced on the bolted joint. The cyclic bending moment resulted in an oscillation of the contact pressure on the contacting surfaces of the engaged threads. The microslip between the engaged threads and the variation of the contact pressure were identified to be the major mechanisms responsible for the self-loosening of a bolted joint. Simplified finite element models were developed that confirmed the mechanisms discovered. The major self-loosening behavior of a bolted joint can be properly reproduced with the FE model developed. The results obtained agree quantitatively with the experimental observations.
publisherThe American Society of Mechanical Engineers (ASME)
titleFinite Element Modeling of Self-Loosening of Bolted Joints
typeJournal Paper
journal volume129
journal issue2
journal titleJournal of Mechanical Design
identifier doi10.1115/1.2406092
journal fristpage218
journal lastpage226
identifier eissn1528-9001
keywordsStress
keywordsThread
keywordsForce
keywordsPressure
keywordsFinite element analysis
keywordsFinite element model
keywordsMechanisms
keywordsBolted joints
keywordsModeling
keywordsCycles
keywordsEngineering simulation
keywordsDisplacement
keywordsRotation
keywordsKnudsen number AND Plates (structures)
treeJournal of Mechanical Design:;2007:;volume( 129 ):;issue: 002
contenttypeFulltext


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