Investigations on design limits and improved material utilization of press-fit connections using elastic-plastic design

Falter, Jan; Binz, Hansgeorg; Kreimeyer, Matthias

doi:10.1016/j.apples.2022.100124

Cited by 5 publications

(26 citation statements)

References 7 publications

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“…As an elastic-plastic model, two Ramberg-Osgood curves (cf. [38]) are combined according to [39,40]. Experimental data of a tensile test according to DIN EN ISO 6892 provided by a third party are used to fit the model.…”

Section: Finite Element Models For the Different Prototypesmentioning

confidence: 99%

Investigation of Pressure Chambers for Integrated Fluidic Actuators in Adaptive Slabs

Bosch,

Nitzlader,

Bachmann

et al. 2024

Actuators

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A high proportion of the CO2 emissions worldwide are caused by the construction sector or are associated with buildings. Every part of the industry needs to reduce its share of emissions, so the building sector must also do its part. One possible solution for achieving this reduction in the field of load-bearing structures is the use of adaptive structures. This research focuses on adaptive slab structures, which require specific actuators to be integrated into the system. Conventional actuators are not suitable due to the prevailing requirements, namely installation space and performance. For this investigation, the actuator is divided into different functional components. A rough description of the requirements for one component, namely the energy converter, is given. Different concepts are developed, tested, and compared with numerical results. Due to the requirements, the concepts are limited to hydraulics. The authors then present a comparison of different simulation strategies for the energy converter. Overall, this paper provides a new contribution to the design of energy converter concepts for integrated hydraulic actuators in slabs, along with experimental verification of the working principle of the energy converters to meet the requirements. A simplified numerical model is proposed to estimate the behavior of the energy converter during the early design phase.

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Section: Finite Element Models For the Different Prototypesmentioning

confidence: 99%

Investigation of Pressure Chambers for Integrated Fluidic Actuators in Adaptive Slabs

Bosch,

Nitzlader,

Bachmann

et al. 2024

Actuators

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“…Either elastic-plastic or linear-elastic designs are possible. In industrial practice, linear elastic shrink fits are typically preferred due to a lack of experimental validation (Falter et al, 2023;Kröger and Binz, 2020). The transmission of forces and torques with this kind of connection relies on a frictional connection.…”

Section: Optimization Of Stress For Shrink-fit Connectionsmentioning

confidence: 99%

Artificial Intelligence Techniques for Improving Cylindrical Shrink-Fit Shaft-Hub Couplings

et al. 2023

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Due to the continuous progress in information technology, complex problems of machine elements can be investigated using numerical methods. The focus of these investigations and optimizations often aims to reduce the stresses that occur or to increase the forces and torques that can be transmitted. Interference fit connections are an essential machine element for drive technology applications and are characterized by their economical fabrication. The transmission of external loads over a large contact surface between the shaft and hub makes it less vulnerable to impact loads. These advantages contrast with disadvantages such as the limited transmittable power, the risk of friction fatigue, and stress peaks at the hub edges, which can lead to undesirable and sudden failure, especially in the case of brittle hub materials. Analytical approaches already exist for optimizing these connections, which are expensive, time-consuming, and complex, so a high degree of expert knowledge is required to apply these methods in practice successfully. This paper presents a novel method using the example of optimizing the pressure distribution in the interface of a shrink-fit connection.

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“…Press-in connections are one of the most commonly used methods of joining the components of machinery and equipment [1], which mainly follows from the advantages of those connections, including accurate coaxiality, high variable and impact load transfer capacity, the possibility of repeated disassembly, and a small process cost [2]. In terms of assembly technology, shrink and press-in connections are differentiated.…”

Section: Introductionmentioning

confidence: 99%

The Use of PVD Coatings for Anti-Wear Protection of the Press-In Connection Elements

Kowalski

2024

Coatings

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Press-in connections are the commonly used methods for connecting machinery components. In relation to that wide use, those connections are liable to various types of damage and wear. Therefore, this article proposes one of the methods which may improve the life of the press-in connection. CrN+OX, TiN, and ZrN coatings made in the PVD technology were used. The coatings were applied on shafts mating with sleeves and subjected to a rotational bending moment. Tests and observations were conducted that enabled the assessment of the influence of those coatings on the development of wear, in particular fretting, in the tribological kinematic pair. The tests showed the development of wear on all the observed shaft surfaces, with a lower intensity of damage recorded on coated shafts compared to uncoated ones. The traces of fretting wear were noted each time at the edges of the connection, which is due to the mechanism of wear development under rotational bending conditions. In the case of uncoated shafts, wear occurs at the entire circumference of the axle seat in the form of a 3–4 mm wide ring; however, that width is different on either side. In the case of coated shafts, wear occurs on the circumference of the axle seat in the form of a thin ring 1–3 mm wide, depending on the coating. In the case of a ZrN coating, fretting wear appears locally. The largest surface area occupied by wear is 0.75 cm2. Fretting wear comprises mainly material build-ups, pits, and surface scratches. In addition to fretting wear, damage resulting from the process of forcing the sleeve onto the shaft was observed on the tested surfaces.

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Investigations on design limits and improved material utilization of press-fit connections using elastic-plastic design

Cited by 5 publications

References 7 publications

Investigation of Pressure Chambers for Integrated Fluidic Actuators in Adaptive Slabs

Investigation of Pressure Chambers for Integrated Fluidic Actuators in Adaptive Slabs

Artificial Intelligence Techniques for Improving Cylindrical Shrink-Fit Shaft-Hub Couplings

The Use of PVD Coatings for Anti-Wear Protection of the Press-In Connection Elements

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