ConferenceConference Proceedings of the Society for Experimental Mechanics Series · January 1, 2021
Unstable equilibria play an important organizing role in nonlinear dynamic systems in a global sense. However, it is difficult to measure them directly in a physical experiment. In this study, a digital image correlation (DIC) system is used to capture the ...
Full textCite
ConferenceConference Proceedings of the Society for Experimental Mechanics Series · January 1, 2021
Perhaps the two most common forms of potential energy are those associated with gravitational and elastic forces. In an experimental setting, if we can measure the force required to maintain equilibrium, then the extraction of potential energy is relativel ...
Full textCite
ConferenceConference Proceedings of the Society for Experimental Mechanics Series · January 1, 2019
Curved structures, such as beams, arches and panels are capable of exhibiting snap-through buckling behavior when loaded laterally. However, the propensity to maintain a stable snapped-through equilibrium position (in addition to the nominally unloaded equ ...
Full textCite
ConferenceJournal of Physics Conference Series · October 3, 2016
In rotordynamics, it is often important to be able to predict critical speeds. The passage through resonance is generally difficult to model. Rotating shafts with a disk are analyzed in this study, and experiments are conducted with one and two disks on a ...
Full textCite
ConferenceJournal of Physics Conference Series · October 3, 2016
This research considers the structural behavior of slender, mechanically buckled beams and panels of the type commonly found in aerospace structures. The specimens were deflected and then clamped in a rigid frame in order to exhibit snap-through. That is, ...
Full textCite
ConferenceConference Proceedings of the Society for Experimental Mechanics Series · January 1, 2016
The deformation and vibration of vertical, highly flexible loops are investigated primarily from an experimental perspective. Both upright and hanging loops are considered with a small clamped length. The effects of self-weight on the loop static deformati ...
Full textCite
ConferenceConference Proceedings of the Society for Experimental Mechanics Series · January 1, 2016
In the present paper, the observation and characterization of isolated response curves (IRCs) are experimentally reported in the case of a nonlinear system consisting of two masses sliding on an horizontal guide. Transverse springs are attached to one mass ...
Full textCite
ConferenceProceedings of the ASME Design Engineering Technical Conference · January 1, 2015
In the present paper, isolated response curves in a nonlinear system consisting of two masses sliding on a horizontal guide are examined. Transverse springs are attached to one mass to provide the nonlinear restoring force, and a harmonic motion of the com ...
Full textCite
ConferenceConference Proceedings of the Society for Experimental Mechanics Series · January 1, 2014
A key feature of many nonlinear dynamical systems is the presence of co-existing solutions, i.e, nonlinear systems are often sensitive to initial conditions. While there have been many studies to explore this behavior from a numerical perspective, in which ...
Full textCite
Conference7th European Conference on Structural Dynamics Eurodyn 2008 · January 1, 2008
This paper models two configurations of flexible risers and pipelines as slender elastica structures. The theoretical formulation leads to a type of nonlinear boundary value problem that can be solved numerically given appropriate boundary conditions. The ...
Cite
ConferenceAip Conference Proceedings · August 19, 2003
Long-term, high-level performance demands on a variety of structures and equipment have stimulated significant research in the field of structural health monitoring. The primary goals of this field are to provide information regarding structural performanc ...
Full textCite
ConferenceStructural Health Monitoring 2003 from Diagnostics and Prognostics to Structural Health Management Proceedings of the 4th International Workshop on Structural Health Monitoring Iwshm 2003 · January 1, 2003
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 involv ...
Cite
Conference19th AIAA Applied Aerodynamics Conference · January 1, 2001
In the past, a good deal of the research on the feasibility of inflatable structures for space applications has focused on the behavior of inflated cylinders. In many cases, especially in theoretical and numerical studies, the cylinder has been assumed to ...
Full textCite
Conference41st Structures Structural Dynamics and Materials Conference and Exhibit · January 1, 2000
A method for investigating the degree of stability of nonlinear limit cycle oscillations (LCO) observed in an aeroelastic system is presented. The system considered is a typical section airfoil model with a free-play nonlinear-ity in the control surface st ...
Full textCite
Conference35th Aerospace Sciences Meeting and Exhibit · January 1, 1997
This paper presents a correlation study between numerical and experimental results for the response of a typical section airfoil with freeplay in the control surface. Since this is an inherently nonlinear system the equations of motion are integrated numer ...
Cite
ConferenceASME International Mechanical Engineering Congress and Exposition Proceedings Imece · January 1, 1996
Since monitoring all the state variables in dynamic experiments may be difficult or even impossible, and since it is desirable to reduce the coupling between the system under study and the measuring device to as low a level as possible, it is useful to ass ...
Full textCite
ConferenceProceedings of the ASME Design Engineering Technical Conference · January 1, 1995
Experimental results are presented which characterize the dynamic response of homogeneous, fully clamped, rectangular plates to narrow band acoustic excitation and uniform thermal loads. Using time series, pseudo-phase projections, power spectra and auto-c ...
Full textCite
ConferenceProceedings of the ASME Design Engineering Technical Conference · January 1, 1995
A rigid, slender, rectangular block is an apparently simple example of a stability problem. In a static sense, the upright position remains stable providing the restoring moment due to gravity is sufficient to offset any applied overturning moment. Rotated ...
Full textCite
ConferenceProceedings of the ASME Design Engineering Technical Conference · January 1, 1993
The elastic pendulum is a 2-degree-of-freedom, nonlinear device in which the pendulum bob may slide up and down the pendulum arm subject to the restoring force of a linear spring. In this study, radial motion (motion along the arm) is excited directly. Res ...
Full textCite
