Experimental validation of numerical structural dynamic models for metal plate joining techniques

Belle, Lucas Van; Brandolisio, Daniele; Deckers, Elke; Jonckheere, Stijn; Claeys, Claus; Pluymers, Bert; Desmet, Wim

doi:10.1177/1077546317704794

Cited by 10 publications

(4 citation statements)

References 40 publications

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“…The lap joint involves the whole width of the plates, and the overlap measures 20 mm in the length direction. Similar single lap joints are modelled also in the articles by He [6] and Van Belle [7]. In this work the system is clamped at one side, and the elastic module of the clamped plate is the parameter to be estimated.…”

Section: Finite Element Modellingmentioning

confidence: 99%

Virtual Sensing Techniques for the Estimation of Joints Concept Models Parameters

Gallas¹,

Croes²,

Jonckheere³

et al. 2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Within the current trend towards lightweight and multi-material structures, the design of structural joints has even more become a topic of particular interest. Including these joints in models that can be used in the design, monitoring and control of structures dynamics behavior is fundamental. In front of the multiple modelling strategies, the engineer always has compromise between accuracy and simplicity, according to the application requirements. On the one hand, high complexity models have the potential to be very accurate but they require long modelling and simulation times and an extensive set of to be identified parameters. On the other hand, simple concept models, that approximate the behavior on a system level, allows a still representative accuracy with a lower computational cost for a large set of applications. In this latter case, it is more challenging to identify the parameters and their corresponding application range. In this context the parameter estimation techniques that inherently account for the model inaccuracies gain importance. This work proposes a new methodology for the estimation of the parameters for an adhesive joint concept model. The novelty involves a virtual sensing strategy, where the model and the experiments are used in a coupled fashion, to obtain with a limited number of simple non-intrusive measurements, an extended set of virtual data. Particularly a stochastic estimator has been used: the Kalman Filter brings together measurements from accelerometers with a reduced order model. Sensitivity and observability analysis are performed to set the initial configuration of the algorithm. Finally the work shows, numerically and experimentally, that this methodology allows to estimate the parameters of an adhesive joint concept model, resulting in an accurate representation of the system.

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Section: Finite Element Modellingmentioning

confidence: 99%

Virtual Sensing Techniques for the Estimation of Joints Concept Models Parameters

Gallas¹,

Croes²,

Jonckheere³

et al. 2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…This may lead to susceptibility to corrosion, crack sensitivity, and low ductility. While alternative welding processes can be applied for the joining of dissimilar materials, intermediary materials may be required, or the output is low-quality [10][11][12]. The resistance spot welding of aluminum to steel is a good example of such complexities.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach to Friction Drilling Process: Experimental and Numerical Study on Friction Drill Joining of Dissimilar Materials AISI304/AL6061

Dehghan

Abbasi

Baharudin

et al. 2022

Metals

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Joining dissimilar materials is always a challenging and interesting topic for researchers and industries. Friction drill joining, as a solid-state process, is a novel approach to connecting similar and dissimilar materials. Dissimilar metals, especially ultra-high-strength steels and aluminum alloys, are used significantly for the mass reduction of automotive bodies, and to reduce CO2 emissions in the automotive industry. In the current work, a friction drill joining technique for joining AISI304 and Al6061 was experimentally and numerically studied. A technique for improving joint strength, load-clamping modification, and tool movement was also introduced. The required thrust force is measured, and it is proven that adding sheet layers does not significantly affect the required thrust force. To understand and identify the mechanism of the process, and its material behaviour, material stirring and formation in the joint region were analyzed. A thermo-mechanical finite element model was also developed, and the thermal stress, plastic strain, and temperature were studied. A numerical comparison between joints formed under normal and improvement conditions was conducted, and the significant effect of the improvement conditions on joint strength and formed-bush quality was found. Based on the findings, the great potential of using friction drill joining for joining dissimilar materials is confirmed.

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“…Depending on the application and on the requirements regarding accuracy and computational power, finite element models with different levels of complexity can be used for the connections between metal substrates [2], [3]. Our group has recently experimentally validated linear joint models, pre-defined within a commercial finite element software, by using vibration measurements [4]. Four different joining technologies were modelled with an accuracy of 12% maximum relative error for the first 6 modal frequencies.…”

Section: Introductionmentioning

confidence: 99%

Experimental Model Update for Single Lap Joints

Gallas

Devriendt

Croes

et al. 2022

Nonlinear Structures &Amp; Systems, Volume 1

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With the increasing trend towards lightweight assemblies, the designer has to face new NVH challenges. Particularly, various structural joints have a different impact on the vibration response of these assemblies, which should be numerically modelled since the early stage of the design. The goal of this work is to experimentally assess the accuracy of simplified finite element models for joints, and to evaluate how model updating techniques can improve the model accuracy. Four different lap joint samples are considered, each of them constituted by two aluminum plates connected with a different technology: 1 epoxy adhesive, 1 toughened acrylic adhesive, 1 acrylic foam tape and 1 bolted joint, which is assessed for multiple preload configurations. For each of these cases an experimental modal analysis is performed, a finite element model with input parameters from the datasheet of the bonding method is set up, and finally these joint parameters are updated with respect to the experimental reference. We apply the same procedure on an industrial case: the adhesive connection between the tube and the bracket of an automotive shock absorber. It is shown that the initial finite element models generally shows a good agreement with the experiments for stiff adhesives. However, for the more flexible adhesives the model update offers a significant accuracy improvement which can be important to account for during the design.

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Experimental validation of numerical structural dynamic models for metal plate joining techniques

Cited by 10 publications

References 40 publications

Virtual Sensing Techniques for the Estimation of Joints Concept Models Parameters

Virtual Sensing Techniques for the Estimation of Joints Concept Models Parameters

A Novel Approach to Friction Drilling Process: Experimental and Numerical Study on Friction Drill Joining of Dissimilar Materials AISI304/AL6061

Experimental Model Update for Single Lap Joints

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