Non linear finite element model validation of a lap-joint

A. delli Carri, D. Di Maio*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)

Abstract

It is commonly accepted that bolted structures can present nonlinearities caused by contact conditions, and that these are severely exercised for large vibration amplitudes. Several researches have targeted these joints’ nonlinear behaviour and experimental model validations have demonstrated to be successful. An earlier publication of the authors demonstrates that nonlinearities identified in modal space can be correlated with the same ones identified in the physical space using the reverse path method. A dumbbell test rig was designed and manufactured so as to have two lap joints connecting the two weights placed at either ends of the bolted beam. The test structure was modelled by both two degrees of freedom lump parameter model and Finite Element. The nonlinearities were identified in the first stage of this research work and validated by using a simple spring mass model. The objective of this paper is to show how to model the nonlinear dynamics of the dumbbell test structure using a standard FE package. The validated nonlinear characteristics of the lap-joint will be modelled in the FE environment and prediction of nonlinear responses will be correlated with the experimental ones.

Original languageEnglish
Title of host publicationNonlinear Dynamics
Subtitle of host publicationProceedings of the 33rd IMAC, A Conference and Exposition on Structural Dynamics, 2015
EditorsGaëtan Kerschen
Place of PublicationCham
PublisherSpringer
Pages279-291
Number of pages13
Volume1
ISBN (Electronic)978-3-319-15221-9
ISBN (Print)978-3-319-15220-2
DOIs
Publication statusPublished - 2016
Externally publishedYes
Event33rd Conference and Exposition on Structural Dynamics, IMAC 2015 - Orlando, United States
Duration: 2 Feb 20155 Feb 2015
Conference number: 33

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
PublisherSpringer
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Conference

Conference33rd Conference and Exposition on Structural Dynamics, IMAC 2015
Abbreviated titleIMAC
CountryUnited States
CityOrlando
Period2/02/155/02/15

Keywords

  • Experimental data
  • Lap-joint
  • Modal testing
  • Model updating
  • Nonlinearities

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