Constitutive Law Identification and Fatigue Characterization of Rigid PUR Elastomers 80 ShA and 90 ShA

Junik, Krzysztof; Lesiuk, Grzegorz; Duda, Szymon; Jamroziak, Krzysztof; Błażejewski, Wojciech; Zielonka, Paweł; Socha, Tomasz; Denisiewicz, Arkadiusz; Kula, Krzysztof; Szczurek, Anna

doi:10.3390/ma15196745

Cited by 6 publications

(4 citation statements)

References 50 publications

(54 reference statements)

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“…Experimental data of a tensile test according to DIN EN ISO 6892 provided by a third party are used to fit the model. For the hyperelastic model of PUR D44, Arruda fitting by AN-SYS Workbench is used with data from [41]. The structural steel undergoes linear elastic modeling based on the expectation of low stresses.…”

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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“…Furthermore, Krzysztof Junik et al [4] present the results of a study of polyurethane rigid (PUR) elastomers in terms of constitutive law identification and analyze the effect of polyurethane elastomers' hardness on fatigue properties. The research objects were PUR materials based on 4,4 -diphenylmethane diisocyanate (MDI) with hardnesses of 80 ShA and 90 ShA, typically used in various industrial applications.…”

Section: Contributionsmentioning

confidence: 99%

Special Issue “Fracture Mechanics and Fatigue Damage of Materials and Structures”

Lesiuk

Rozumek

2023

Materials

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“…The crosslinking is not broken when heated, so once cross-linked, the material cannot be heat-molded again. They are usually insoluble, but they swell [ 3 ]. Elastomers—at low stresses—show high deformation (up to 1000%), since their glass transition temperature is below room temperature, so the temperature range of use is highly elastic [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Comparative Evaluation of the Tribological Properties of Polymer Materials with Similar Shore Hardness Working in Metal–Polymer Friction Systems

et al. 2023

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This article presents comparative tests of contact strength and tribological wear resistance of polymer sliding materials of the polyamide group. The aim of this work was to study Shore hardness, indentation hardness, modulus, creep, relaxation, Martens hardness and sliding wear resistance of two commercial materials. One of these materials was produced with the recycling process in mind. Abrasion tests were performed against a stainless-steel ball (100CRr6) on a normal load of 5 N for 23,830 friction cycles. The samples were tested under dry friction conditions and taking into account the hydrothermal factor, the presence of which was assumed in the anticipated operating conditions. It was distilled water at a temperature of 50 °C. The volumetric wear of the samples under various environmental conditions was assessed and related to the mechanical properties, in particular, Shore hardness. This mechanical size, which characterizes the surface, was considered the most frequently used by engineers selecting polymeric materials for tribological applications in industry. The Shore hardness of both materials was similar, which may indicate similar tribological performance properties. However, research and analysis indicate the need to use measures that directly correspond to tribological wear. The friction and wear of both materials varied. The coefficient of friction in hydrothermal conditions was lower and the wear was higher than in the dry friction test. It seems that it was not hardness that determined the suitability in the anticipated operating conditions, but the ability to form a sliding layer on the friction surface. The properties of the material that has been envisaged as a replacement may be appropriate for the intended uses.

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Constitutive Law Identification and Fatigue Characterization of Rigid PUR Elastomers 80 ShA and 90 ShA

Cited by 6 publications

References 50 publications

Investigation of Pressure Chambers for Integrated Fluidic Actuators in Adaptive Slabs

Investigation of Pressure Chambers for Integrated Fluidic Actuators in Adaptive Slabs

Special Issue “Fracture Mechanics and Fatigue Damage of Materials and Structures”

Comparative Evaluation of the Tribological Properties of Polymer Materials with Similar Shore Hardness Working in Metal–Polymer Friction Systems

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