Microslip Joint Damping Prediction Using Thin-Layer Elements

Ehrlich, Christian; Schmidt, André; Gaul, Lothar

doi:10.1007/978-3-319-04501-6_22

Cited by 12 publications

(17 citation statements)

References 4 publications

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“…The main disadvantage of all presented methods are, that they are limited to the defined interaction law or properties of the components. Advanced methods to consider dynamic joint properties focus on the approach of a material gradient in the interaction zone [9][10][11]. Thereby, the so-called Thin-Layer-Element (TLE) method is used.…”

Section: Simulative Methodsmentioning

confidence: 99%

“…In this context, two methods are established to calibrate the numerical joint properties: a purely numerical parameter optimization study [14] and a calibration of the simulation with experimental determined joint properties [9,15].…”

Section: Simulative Methodsmentioning

confidence: 99%

“…For the evaluation of the structural dynamics response and thus the joint properties, the hysteresis loop approach is usually used. Thereby, the potential energy and the dissipated energy per cycle at resonance is evaluated [9,[15][16][17][18].…”

Section: Experimental Methodsmentioning

confidence: 99%

See 2 more Smart Citations

A Contribution to Predict the Structural Dynamics of Mounted Short Glass Fiber Reinforced Thermoplastic Components

Kriwet¹,

Stommel²

2021

14th WCCM-ECCOMAS Congress

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At the state of art, current simulative methods modelling joint properties as fixed interaction between components or concentrate on the characterization of the joint stiffness and damping of coupled metallic structures. In the current work, the developed thin layer interaction (TLI) method was applied to study the influence of the joint stiffness and damping of plastic components coupled with metallic structures. The joint stiffness and damping of different coupled metallic-plastic joint structures was characterized experimentally and was used to fill the reduced transverse shear stiffness and damping tensors of the numerical TLI model. The TLI model was used to determine the structural dynamics behavior of a short glass fiber reinforced plastic engine bracket mounted to a steel block. The comparison of experimental and simulative results shows a better correlation under the usage of the TLI model compared to a fixed modeled joint behavior. As result, the TLI model allows a better prediction of the structural dynamics of coupled plastic components. Further researches focus on the accurate experimental estimation of the boundary conditions regarding excitation and mounting of the plastic components. Thus, a more realistic modelling of the numerical joint boundary conditions is possible for an improved simulation of the structural dynamics of plastic components.

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Section: Simulative Methodsmentioning

confidence: 99%

Section: Simulative Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A Contribution to Predict the Structural Dynamics of Mounted Short Glass Fiber Reinforced Thermoplastic Components

Kriwet¹,

Stommel²

2021

14th WCCM-ECCOMAS Congress

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show abstract

“…For the flange clamping area, the sub-flange stiffness 34,35 is wherein E i is the sub-flange elastic modulus, D i is the diameter of nut pressure area, d i is the bolt hole diameter, t i is the sub-flange thickness, is the half pressure-cone angle. For two flanges with same thickness, as shown in Figure 11, the stiffness of sub-flange 1 k m1 and the stiffness of sub-flange 2 k m2 , are determined by applying substitution (25) and (26), respectively:…”

Section: Stiffness Of Aero-engine Bolted Jointmentioning

confidence: 99%

“…Ahmadian et al 24 introduced the same method into the contact interfaces of AWE-MACE structure and used a layer of special interface elements having material properties to improve the prediction of the complete model, the parameters of the thin-layer elements were modified by using the optimization algorithm based on the modal test results. Bograd et al 25,26 considered the bolted joint damping and performed the experiments to find the damping and stiffness parameters of the bolted joints, then the joint's interfaces were modeled with the thin-layer elements which contained the acquired experimental parameters. Ma 27 applied the thin-layer elements into the welding parts of the aeroengine casing.…”

Section: Introductionmentioning

confidence: 99%

Research and application of improved thin-layer element method of aero-engine bolted joints

Xingyu

Wang

Zhang

2016

Proceedings of the Institution of Mechanical Engineers, Part G:

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A new dynamic modeling method called the improved thin-layer element method is proposed to apply to the aero-engine bolted joints. The thin-layer elements are partitioned based on the interface contact stress distribution. In addition, the material parameters of the partitioned thin-layer elements are determined by the bolted joints stiffness technique and the fractal contact theory without the experimental results, which allows the engineer to estimate the dynamic characteristics of whole structure before the physical prototype is available. First, the modeling principles of the improved thin-layer element method are studied and the bolted joints stiffness is analyzed. Next, the material parameters of the partitioned thin-layer elements are determined on the basis of the interface contact stress distribution characteristics of the bolted joints. Finally, this method is applied to the simulative casing bolted joints structure and the results are compared with the experimental results in order to verify the proposed method. The results indicate that the improved thin-layer element method is more accurate than the thin-layer elements method, and the material parameters of the partitioned thin-layer elements can be expressed by the structural parameters of the aero-engine bolted joints without updating based on the experiment.

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Parameter Identification of a Linear Substitution Model for Nonlinear Contact and Damping Inside Lap Joints Using Distributed Optimization

Pöchacker

Lauß

Pichler

et al. 2020

Nonlinear Structures &Amp; Systems, Volume 1

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Microslip Joint Damping Prediction Using Thin-Layer Elements

Cited by 12 publications

References 4 publications

A Contribution to Predict the Structural Dynamics of Mounted Short Glass Fiber Reinforced Thermoplastic Components

A Contribution to Predict the Structural Dynamics of Mounted Short Glass Fiber Reinforced Thermoplastic Components

Research and application of improved thin-layer element method of aero-engine bolted joints

Parameter Identification of a Linear Substitution Model for Nonlinear Contact and Damping Inside Lap Joints Using Distributed Optimization

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