Experimental Determination of Frictional Interface Models

Bonney, Matthew S.; Robertson, Brett Anthony; Mignolet, Marc P.; Schempp, Fabian; Brake, Matthew Robert

doi:10.1007/978-3-319-29763-7_47

Cited by 11 publications

(3 citation statements)

References 9 publications

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“…Three different impact levels were selected, 60 N 210 N and 340 N, and each level was repeated five times. These force levels were chosen based on the experience from previous testing conducted on the BRB [21]. The response of the system was sampled at 6400 Hz with a 10 s recording time and 0.1 s pre-trigger.…”

Section: Methodsmentioning

confidence: 99%

Experimental Assessment of the Influence of Interface Geometries on Structural Dynamic Response

Dossogne

Jerome

Lancereau

et al. 2017

Dynamics of Coupled Structures, Volume 4

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Jointed interfaces are sources of the greatest amount of uncertainty in the dynamics of a structural assembly. In practice, jointed connections introduce nonlinearity into a system, which is often manifested as a softening response in frequency response, exhibiting amplitude dependent damping and stiffness. Additionally, standard joints are highly susceptible to unrepeatability and variability that make meaningful prediction of the performance of a system prohibitively difficult. This high degree of uncertainty in joint structure predictions is partly due to the physical design of the interface. This paper experimentally assesses the influence of the interface geometry on both the nonlinear and uncertain aspects of jointed connections. The considered structure is the Brake-Reuß beam, which possesses a lap joint with three bolted connections, and can exhibit several different interface configurations. Five configurations with different contact areas are tested, identified, and compared, namely joints with complete contact in the interface, contact only under the pressure cones, contact under an area twice that of the pressure cones, contact only away from the pressure cones and Hertzian contact. The contact only under the pressure cone and Hertzian contact are found to behave linearly in the range of excitation used in this work. The contact area twice that of the pressure cone behaves between the complete contact and contact only under the pressure cone cases.

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Section: Methodsmentioning

confidence: 99%

Experimental Assessment of the Influence of Interface Geometries on Structural Dynamic Response

Dossogne

Jerome

Lancereau

et al. 2017

Dynamics of Coupled Structures, Volume 4

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show abstract

“…It is fascinating that practically all surfaces found in nature have roughness, with the exception of some unique materials such as mica, which has a smooth molecular surface [34]. Segalman and Brake investigated the influence that contact surface roughness, as a micro scale quantity, has on the overall macro response of a bolted connection [2,3,35]. In these studies, the authors emphasize the contact roughness influence on the jointed structure response and on contact pressure distribution.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of structural damping in a beam with bolted splice connection

Mijatović¹,

Borković²,

Guzijan-Dilber³

et al. 2022

Preprint

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The objective of this research is to develop a numerical model of one widely used bolted beam splice connection that dissipates energy through structural damping. The reference experimental setup is carefully designed to obtain the highly nonlinear dynamic response due to the suddenly released load. The fact that the monolithic beam with welded connection has a linear response is utilized for the initial calibration of the numerical and experimental models. Then, the numerical model of bolted beam splice connection is verified and adopted through an iterative process. The influences of time and spatial integration, bolt load application, element type, contact formulation, bulk viscosity, and mass scaling are discussed. A special attention is given to the load application and load release functions. After the verification, the Abaqus/Explicit numerical model is validated through the comparison with experimental data, where an appropriate friction coefficient is adopted. It is demonstrated that the nonlinear structural damping occurs due to the complex micro slip behavior at the contact interface.

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“…The research focus then shifted to modeling complex localized 1 behavior of frictional forces [35,36]. Iwan models, which were initially developed for modeling hysteretic behavior under constant unidirectional normal load, have been employed extensively to model certain types of interfaces [37][38][39][40]. Later, models which predict the local frictional forces under different regimes of stick, slip, and separation under varying periodic normal loads were proposed [41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling and Projection-Based Reduction Methods for Bladed Disks With Nonlinear Frictional and Intermittent Contact Interfaces

Mitra

Epureanu

2019

Applied Mechanics Reviews

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Turbine bladed disks or blisks, which constitute critical components of most modern turbomachinery, are known for their complex vibratory behavior. The nonlinear dynamics observed in most operational regimes of blisk with contact interfaces are dominated by one of two typical contact behaviors. Frictional contacts are dominated by Coulomb friction forces, while intermittent contacts are characterized by multiple separation events. Other factors such as the dispersion in material or geometric properties across blades, known as mistuning, also affect the dynamics significantly. Presently, probabilistic analysis is the widely accepted design methodology to account for mistuning, which is unknown prior to manufacture. Thus, reduced order modeling of these blisks is essential as high fidelity models are prohibitively expensive for such simulations. This paper provides a technical discussion of dynamic modeling and reviews projection-based techniques used for creation of reduced models of blisks with contacts.

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Experimental Determination of Frictional Interface Models

Cited by 11 publications

References 9 publications

Experimental Assessment of the Influence of Interface Geometries on Structural Dynamic Response

Experimental Assessment of the Influence of Interface Geometries on Structural Dynamic Response

Experimental and numerical study of structural damping in a beam with bolted splice connection

Dynamic Modeling and Projection-Based Reduction Methods for Bladed Disks With Nonlinear Frictional and Intermittent Contact Interfaces

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