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Research Papers

Experimental Study on High Damping Rubber Under Combined Action of Compression and Shear

[+] Author and Article Information
Tinard Violaine

ICube,
University of Strasbourg,
CNRS, 2 rue Boussingault,
Strasbourg F-67000, France
e-mail: vtinard@unistra.fr

Nguyen Quang Tam

ICube,
University of Strasbourg,
CNRS, 2 rue Boussingault,
Strasbourg F-67000, France
e-mail: tam.polytechnique@yahoo.com

Fond Christophe

ICube,
University of Strasbourg,
CNRS, 2 rue Boussingault,
Strasbourg F-67000, France
e-mail: christophe.fond@unistra.fr

1Corresponding author.

Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received April 29, 2014; final manuscript received October 8, 2014; published online November 10, 2014. Assoc. Editor: Hareesh Tippur.

J. Eng. Mater. Technol 137(1), 011007 (Jan 01, 2015) (7 pages) Paper No: MATS-14-1095; doi: 10.1115/1.4028891 History: Received April 29, 2014; Revised October 08, 2014; Online November 10, 2014

High damping rubber (HDR) is used in HDR bearings (HDRBs) which are dissipating devices in structural systems. These devices actually have to support permanent static load in compression and potential cyclic shear when earthquakes occur. Mastering the behavior of bearings implies an accurate understanding of HDR response in such configuration. The behavior of HDR is, however, complex due to the nonlinearity and time dependance of stress–strain response and especially Mullins effect. To the authors' knowledge, tests on HDR under combined quasi-static compression and cyclic shear (QC-CS) have not been performed with regard to Mullins effect yet. The purpose of this study is thus to assess experimentally Mullins effect in HDR, especially under QC-CS. In order to achieve this aim, cyclic tensile and compression tests were first carried out to confirm the occurrence of Mullins effect in the considered HDR. Then, an original biaxial setup allowing testing HDR specimen under QC-CS was developed. This setup enables us to identify Mullins effect of the considered HDR under this kind of loading. Tests carried out with this setup were thus widened to the study of the influence of compression stress on shear response under this loading, especially in terms of shear modulus and density of energy dissipation.

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References

Figures

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Fig. 1

Experimental setup used for the tensile tests

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Fig. 2

Stress–strain response in uniaxial cyclic tensile test

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Fig. 3

Stress–strain response for sample of type A (a) and type B (b) in cyclic compression (PLK1 stress represents the first Piola–Kirchhoff stress)

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Fig. 4

Comparison of stress–strain responses of samples of types A and B in cyclic compression

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Fig. 5

Illustration of the shear system used for the experimental tests

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Fig. 6

Illustration of the experimental device developed for the combined compression-shear tests

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Fig. 7

Illustration of the experimental setup during tests

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Fig. 8

History of applied displacement

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Fig. 9

Stress–strain response under combined compression stress of 2 MPa and cyclic shear (a) and variation of the compression stress during the test (b)

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Fig. 10

Stress–strain response under combined compression stress of 4 MPa and cyclic shear (a) and variation of the compression stress during the test (b)

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Fig. 11

Stress–strain response under combined compression stress of 6 MPa and cyclic shear (a) and variation of the compression stress during the test (b)

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Fig. 12

Variations of the normalized compression stresses during the test

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Fig. 13

Variations of shear modulus (a) and density of energy dissipation (b) as a function of the maximum applied shear strain. Solid and open symbols, respectively, represent the first and the third cycle.

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Fig. 14

Variations of shear modulus (a) and density of energy dissipation (b) as function of the applied compression stress

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