Potentials of Load Carrying Conductor Tracks in New Vehicle Structures

Pototzky, Alexander; Stefaniak, Daniel; Hühne, Christian

doi:10.1007/978-3-662-58206-0_8

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Moreover, advantages can be taken from the combination of the two materials, e.g. in case of impact loading [34] or load-bearing applications [35,36], as well as for function integration [37] and structure robustness [38]. Despite these advantages, low-velocity impact damage can lead to internal failure of the laminate, e.g.…”

Section: Fmlsmentioning

confidence: 99%

Experimental determination of dispersion diagrams over large frequency ranges for guided ultrasonic waves in fiber metal laminates

Barth

Wiedemann

Roloff

et al. 2023

Smart Mater. Struct.

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Fiber metal laminates (FML) are of high interest for lightweight structures as they combine the advantageous material properties of metals and fiber-reinforced polymers. However, low-velocity impacts can lead to complex internal damage. Therefore, structural health monitoring with guided ultrasonic waves (GUW) is a methodology to identify such damage.Numerical simulations form the basis for corresponding investigations, but experimental validation of dispersion diagrams over a wide frequency range is hardly found in the literature. In this work the dispersive relation of GUWs is experimentally determined for an FML made of carbon fiber-reinforced polymer and steel. For this purpose, multi-frequency excitation signals are used to generate GUWs and the resulting wave field is measured via laser scanning vibrometry. The data are processed by means of a non-uniform discrete 2d Fourier transform and analyzed in the frequency-wavenumber domain. The experimental data are in excellent agreement with data from a numerical solution of the analytical framework. In conclusion, this work presents a highly automatable method to experimentally determine dispersion diagrams of GUWs in FML over large frequency ranges with high accuracy.

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Section: Fmlsmentioning

confidence: 99%

Experimental determination of dispersion diagrams over large frequency ranges for guided ultrasonic waves in fiber metal laminates

Barth

Wiedemann

Roloff

et al. 2023

Smart Mater. Struct.

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“…For example, components can be manufactured that benefit from the high ductility of the metal as well as the high specific strength of the FRP. This leads to advantages in many areas such as high damage tolerance [3,4], load-bearing applications [5,6], as well as for function integration [7] and structural robustness [8].…”

Section: Introductionmentioning

confidence: 99%

Investigations on Guided Ultrasonic Wave Dispersion Behavior in Fiber Metal Laminates Using Finite Element Eigenvalue Analysis

Barth

Wiedemann

Roloff

et al. 2023

Proc Appl Math and Mech

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Composite materials such as fiber metal laminates combine the advantages of metallic materials and fiber-reinforced polymers. Hence, these materials are of great interest for thin-walled structures in lightweight engineering. Due to the structure of these materials, damage to fiber metal laminate components occur more frequently inside the structure than with conventional materials. Since the detection of interlaminar damage is more complicated compared to external damage, it is one of the biggest challenges in the use of fiber metal laminates. One approach to detect this kinds of damage, is the use of guided ultrasonic waves, for example Lamb waves. To be able to perform such damage detection, knowledge about the propagation behavior of this kind of waves in fiber metal laminates is fundamental. Abrupt stiffness variations across the thickness of fiber metal laminates, resulting from the different material layers, lead to the question whether the known approaches for the propagation of guided ultrasonic waves in isotropic and transversely isotropic materials are applicable here. Therefore, the objective of this work is to investigate the propagation behavior of these guided ultrasonic waves in fiber-metal laminates over large frequency ranges. For this purpose, dispersion relations from finite element simulations are compared with experimental data and numerical solutions based on the analytical framework. The investigations are carried out using a fiber metal laminate consisting of steel and carbon fiber-reinforced polymers. Due to the orthotropy of the laminate, wave propagation in the fiber direction and perpendicular to it is considered. For the finite element simulations a linear two dimensional eigenvalue analysis is used. This method is especially suitable because it offers a very efficient modeling approach for this kind of application. The experimental data are based on measurements contained in previous publications by the authors. The comparison of the finite element simulations with the experimental data and the data from the analytical framework show that they are in good agreement. The results shown in this work serve to validate the numerical approach presented and allow for further, more complex simulations.

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Design Principles and Multi-Level Structures for Multi-Functional and Multi-Material Design

Fröhlich

Vietor

2022

Proc. Des. Soc.

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Multi-functional design has high potential to overcome e.g. increasing weight and costs of products. However, the possible solution space for integrating functions is hardly manageable. This paper presents an approach to assist in the identification of multi-functional approaches. Therefore, hybrid design principles are developed that are combinable to complex structures including specific manufacturing routes. By this, multi-functional solutions can be provided on different resolutions in order to identify the most promising approach and position for the integration of additional functions.

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Potentials of Load Carrying Conductor Tracks in New Vehicle Structures

Cited by 3 publications

References 5 publications

Experimental determination of dispersion diagrams over large frequency ranges for guided ultrasonic waves in fiber metal laminates

Experimental determination of dispersion diagrams over large frequency ranges for guided ultrasonic waves in fiber metal laminates

Investigations on Guided Ultrasonic Wave Dispersion Behavior in Fiber Metal Laminates Using Finite Element Eigenvalue Analysis

Design Principles and Multi-Level Structures for Multi-Functional and Multi-Material Design

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