Adhesive Layer Influence on Compressive and Tension Stiffness of Thin-Layer Rubber-Metal Elements

Gonca, Vladimirs; Polukoshko, Svetlana; Hiļķeviča, Gaļina

doi:10.1007/978-3-319-09918-7_62

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“…5, experimental data of K tori are depicted as solid lines and theoretical data K torit -as dot lines. Shear module G for rubber of grade 8871 is 0.45 MPa, but for calculation stiffness in accordance with (10), taken into account the adhesive layer influence, we assumed G equal to 0.62 MPa [10]. The theoretical torsion stiffness does not depend on the applied torsion moment, the experimental values mainly coincide with the calculated theoretical values.…”

Section: Resultsmentioning

confidence: 83%

Torsional, compression and shear stiffness of thin-layer rubber-metal spherical joint-hinge

Polukoshko¹,

Martinovs²,

Gonca³

2017

Engineering for Rural Development

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Abstract. In this paper laminated elastomeric bearings (composite of thin elastomer and metal layers) are considered. This type of bearings or joint-hinge has many advantages because of ease of maintenance; ability to work in a very aggressive environment, low cost and vibration damping capability. The geometric shape of such bearing may be planar, cylindrical, conical, spherical and other, given work deals with spherical thin-layered rubber-metal bearings. Operating of such device depends on many factors that must be considered on the design stage: parameters of the elements must be selected properly. The most important parameter is stiffnessdependence between imposed force and received deformation. In this work torsional, compression and shear stiffness of laminated bearings was defined for the testing specimens by experiments and torsional stiffness was received analytically. Both methods show good enough coincidence.Keywords: elastomers, rubber bearing, laminated rubber hinge, stiffness, torsion, shear, compression. IntroductionRubber and rubber-like materials (elastomers) exhibit specific properties: high elasticity, resistance to aggressive environmental factors, good dynamic properties, low volume compressibility, linear relationship between stress and strain up to strain of 15-20 %. Elastomeric materials offer many engineering advantages and are widely used in machine building, shipbuilding, civil engineering, aviation and aerospace as compensation devices, vibration dampers, shock absorbers [1-6].Reinforced elastomers, or laminated elastomeric structures, consist of a large number of alternating thin layers of elastomeric and reinforcing layers of other much more rigid material, usually metal. The connection of elastomeric and reinforcing layers is usually fulfilled by means of vulcanization or gluing. Such structures are successfully replacing the traditional technical systems because of their ability to endure high stress (> 200 MPa) and low ratio of shear/bulk compression moduli [2; 7]. The evident advantages of laminated elastomeric structures are: ease of maintenance; impossibility of jamming in case of breakage; no necessity for lubrication, ability to work in a very dirty, dusty, abrasive environment; vibration and noise reduction; improving the dynamics of machines, which provide the properties of rubber and lack of clearances, as well as compensation of various skew distortions and inaccuracies in the joint connection; smaller size, weight and cost. Packages of thin-layered rubber-metal elements (further TRME) are successfully used as bearings, joints, dampers, compensating devices, shock-absorbers etc. In practice the TRME packages of different geometric shapes are used: planar, cylindrical, conical, spherical and others; the number of layers may be different, at least three. The planar elements of the TRME began to be studied from the 1960s and now they are investigated good enough. The spherical TRME constructions are less studied, but the possibilities of their using are very wide [8; 9]. T...

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Section: Resultsmentioning

confidence: 83%