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This content will become publicly available on May 12, 2017

Title: A reduced Iwan model that includes pinning for bolted joint mechanics

Bolted are joints are prevalent in most assembled structures; however, predictive models for the behavior of these joints do not yet exist. Many calibrated models have been proposed to represent the stiffness and energy dissipation characteristics of a bolted joint. In particular, the Iwan model put forth by Segalman and later extended by Mignolet has been shown to be able to predict the response of a jointed structure over a range of excitations once calibrated at a nominal load. The Iwan model, however, is not widely adopted due to the high computational expense of implementing it in a numerical simulation. To address this, an analytical, closed form representation of the Iwan model is derived under the hypothesis that upon a load reversal, the distribution of friction elements within the interface resembles a scaled version of the original distribution of friction elements. In conclusion, the Iwan model is extended to include the pinning behavior inherent in a bolted joint.
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 2191-5644; 648018
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Proceedings of the Society for Experimental Mechanics Series
Additional Journal Information:
Journal Volume: 4; Related Information: Dynamics of Coupled Structures, Volume 4; Journal ID: ISSN 2191-5644
Society for Experimental Mechanics - Springer
Research Org:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
42 ENGINEERING joint mechanics; Iwan model; pinning; friction; hysteresis