3 edition of Experimental analysis of thread movement in bolted connections due to vibrations found in the catalog.
Experimental analysis of thread movement in bolted connections due to vibrations
by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC], [Springfield, Va
|Statement||written by G. Ed Ramey, Robert C. Jenkins ; prepared by Auburn University, Civil Engineering Department.|
|Series||NASA contractor report -- NASA CR-196579.|
|Contributions||Jenkins, Robert C., United States. National Aeronautics and Space Administration.|
|The Physical Object|
Experimental and Finite Element Analysis of Ball Screw Drive Vibrations Chih-I Chu*1, Lin-Ruen Lee 1, Polin Lee2, Chekang Chang2, Hung-Chih Hsu2, Ying-Ju Lin2 Department of . 10 Tricks Engineers Need to Know About Fasteners. so if you are limited on the bolt size due to dimensional constraints, choose a fine thread for greater strength. Fine threads are also a better choice when threading a thin walled member. You can make bolted connections more resistant to shear loads by using clever design instead of.
fatigue resistance of bolted connections. The recommended preload for reusable connection can be determined by: F i = A tƠ p For permanent joint: F i = A tƠ p Where A t is the tensile stress area of the bolt (m 2); Ơ p proof strength of the bolt (N/m) (it is the highestFile Size: 1MB. Book Description. Insights and Innovations in Structural Engineering, Mechanics and Computation comprises papers that were presented at the Sixth International Conference on Structural Engineering, Mechanics and Computation (SEMC , Cape Town, South Africa, September ). The papers reflect the broad scope of the SEMC conferences, and cover a wide range of engineering .
Authoredy by: Kerry Bock Nord-Lock Inc. Edited by Stephen J. Mraz @ Resources: Nord-Lock Inc., Experimental Analysis of Thread Movement in Bolted. due to embedding depends upon the bolt and joint stiffness, the number of interfaces present within the joint, the preventing relative thread movement between the bolt and nut threads (such as with nylon insert nuts) or relative world on the analysis of bolted joints and bolting technology.
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Experimental Analysis of Thread Movement in Bolted Connections Due to Vibrations Research Project NAS Final Report, August Written by Dr.
Ed Ramey Robert C. Jenkins Prepared by AUBURN UNIVERSITY Civil Engineering Department Harbert Engineering Center Auburn University, Alabama Principal Investigator Dr. Ed Ramey 4 i. The results of the investigation indicated that nut locking devices, joint configuration, fastener size, and mass of configuration were significant in bolt loosening due to vibration.
The results of this test can be utilized to further research the complex problem of bolt loosening due to vibration.
Vibration direction, lubrication on the threads, type of thread locking device used, embedding of the nut or bolt head into the mating materials, load distribution on threads, loading history of the bolt and nut, size of the bolt and nut, and geometry of the threads are parameters which were explored.
The results of the investigation indicated that nut locking devices, joint configuration, fastener size, and mass of configuration were significant in bolt loosening due to vibration. The results of this test can be utilized to further research the complex problem of bolt loosening due to by: 7.
Experimental analysis of thread movement in bolted connections due to vibrations - NASA/ADS The objective of this study was to identify the main design parameters contributing to loosening of bolts due to vibration and to identify their relative importance and degree of contribution to bolt by: 7.
Get this from a library. Experimental analysis of thread movement in bolted connections due to vibrations: final report. [G Ed Ramey; Robert C Jenkins; United States. National Aeronautics and. Get this from a library. Experimental analysis of thread movement in bolted connections due to vibrations: research project NAS final report.
[G Ed Ramey; Robert C Jenkins; United States. National Aeronautics and Space Administration.]. Full text of "Experimental analysis of thread movement in bolted connections due to vibrations" See other formats. The results of the investigation indicated that nut locking devices, joint configuration, fastener size, and mass of configuration were significant in bolt loosening due to vibration.
The results of this test can be utilized to further research the complex problem of bolt loosening due to vibrationAuthor: Robert C. Jenkins and G. ED Ramey. sliding contact thread leadscrew to 30% or less. As is generally the case in life, trade-offs abound, and leadscrews can handle large loads and suffer tremen-dous abuse.
This low efficiency also means that once a bolt is tightened, it generally will not unwind. Once again, reciprocity shows us that a problem can be an opportunity.
rate of the bolt and the spring rate of the clamped components, since turning the bolt stretches the fastener and compresses the parts being clamped. A simple experimental procedure for estimating ap-proximate joint and bolt stiffness is outlined in paragraph File Size: 2MB.
In addition, as the joint behavior is strongly influenced by the bolt preloading, the experimental analysis has been performed applying three different levels of bolt preloading and, starting from the obtained experimental results, simple rules to take it into account are suggested.
Main subjects of research have been: stability (global and local stability); connections (bolted, welded, adhesive bonded connections); and last but not least fatigue (in particular fatigue of welded connections).
The above research effort has resulted in an adequate knowledge of the structural behaviour of aluminium members and connections today. Interpretive Structural Modeling (ISM) of Bolted Joint Subjected to Dynamic Loosening under Soft Foot Condition p Educational Software for Stress Analysis of an Aircraft Fuselage Experimental analysis of thread movement in bolted connections due to vibrations Cited by: 1.
Experimental and analytical studies on the pullout strength of round however, is its low reliability of round thread connections which may fail due to pullout mechanism, resulting in a potential high cost.
This Theoretical Analysis API round thread connections are tapered coupling connections. Their geometric dimensions and tapers,Author: Lianxin Gao, Jiaoqi Shi.
Connections & Interfaces: Visualization The design of a connection or interface follows the same process as the design of a structure, and indeed, the ability to visualize the system, as also discussed on pageis a critical skil l. Using the elements of FRDPARRC, a strategy can first be developed, and then detailed concepts can be created.
The biggest problem of the clamping device, used for the closed frames, are their vibrations and resonance caused due to the rotary motions. The vibrations and resonance negatively affect the process of carbon fibres winding.
Experimental measurements were carried out to determine the acceleration on individual arms of the clamping device Author: Michal Petrů, Radovan Kovář, Tomáš Martinec, Pavel Srb, Aleš Lufinka, Petr Kulhavý.
Threaded pipe connections are commonly used in the oil and gas industry in particular to connect casing strings, drillpipe strings or production and transportation risers and pipelines. In order to maintain a sealed and secure connection while in service, the connections are generally preloaded.
To introduce this preload, the connections commonly have tapered threads and they are assembled by. An experimental procedure and test setup are developed in order to collect real-time data on the rate of clamp load loss per cycle as well as the loosening rotation of the bolt head.
Three levels of hole clearance are investigated; namely, 3%, 6%, and 10% of the bolt nominal by: The induced bolt preload, clamp loads, balanced thread torque, and under-head torque in a bolted joint due to an assembly tightening torque are shown in Figureand the applied loads to a through-bolted joint are illustrated in Figure The following symbols are used: F M = bolt preload load due to M A.
F A = axial force on the bolted axis.The ﬁrst part of this paper describes the iterative sizing procedure of a bolted assembly which properties were optimized in order to satisfy a set of conditions in terms of sliding and maximum stress level. The second part presents the experimental procedure and the ﬁrst results of an experimental modal analysis of the : Sami Daouk, François Louf, Christophe Cluzel, Olivier Dorival, Laurent Champaney.