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Publications [#282331] of Lawrence N. Virgin

Papers Published

  1. Nichols, JM; Moniz, L; Todd, MD; Trickey, ST; Seaver, M; Nichols, CJ; Virgin, LN, Detection of fastener preload loss in a hybrid composite-to-metal bolted joint, Structural Health Monitoring 2003: From Diagnostics and Prognostics to Structural Health Management Proceedings of the 4th International Workshop on Structural Health Monitoring, Iwshm 2003 (January, 2003), pp. 623-633, ISBN 1932078207
    (last updated on 2019/09/20)

    Abstract:
    Copyright © 2003 by DEStech Publications, Inc. All right reserved. In this work we present two novel nonlinear time series analysis techniques-nonlinear cross prediction error and chaotic amplification of attractor distortion-for detecting preload loss in a hybrid metal-to-composite bolted joint. The two techniques involve imposing a chaotic steady-state on the structure and analyzing features from the resulting reconstructed attractors. The joint preload is controlled from a "fully tight" 10200 Ibf preload condition to complete failure (no preload), and numerous vibration tests are performed at discrete increments in that range. The two nonlinear techniques are compared to a linear autoregressive model fit for detection capability.