Compression Stress Relaxation Testing - Comparisons, Methods, and Correlations

Tuckner, Paul

doi:10.4271/2001-01-0742

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…It is a positive influence owing to the function of the O-rings sealing. It is stated in literature dealing with the rubber sealing elements that higher values of permanent deformation are considerably negative (Tuckner 2001). The experiment results confirmed the conclusions of the test with O-rings exposed to the diesel oil and 20% RME for 20 months (Müller et al 2015).…”

Section: Resultssupporting

confidence: 84%

Evaluation of properties of elastomer seal for fuel systems exposed to effects of rapeseed methyl ester

Šleger¹,

Müller²,

Pexa³

2017

Res. Agric. Eng.

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AbstractŠleger V., Müller M., Pexa M. (2017): Evaluation of properties of elastomer seal for fuel systems exposed to effects of rapeseed methyl ester. Res. Agr. Eng., 63: 115-120.Elastomer seals in fuel systems have to evince required mechanical properties also at exposure to fuels. The aim of the research was to determine an influence of various concentrations of rapeseed methyl ester (RME) on a change of mechanical properties of sealing O-rings made from polyacrylate elastomer (an indication ACM). A permanent deformation -compression set (CS), a tensile strength and an elongation after the exposure to the tested environment for the time 20 months were evaluated within the experiment. A fall of the tensile strength, the elongation and the permanent deformation -compression set CS was proved depending on the type of the fuel. The increased negative influence of various concentrations of RME (20% to 100%) on the tested properties of the sealing O-rings compared with the diesel oil complying with the standard EN 590:2004 was not proved. So a significant negative influence of degradation aspects on the tested properties of the O-rings of the ACM type (polyacrylate elastomer) was not proved.

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Section: Resultssupporting

confidence: 84%

Evaluation of properties of elastomer seal for fuel systems exposed to effects of rapeseed methyl ester

Šleger¹,

Müller²,

Pexa³

2017

Res. Agric. Eng.

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“…After completing what were essentially static tests, the o-rings were examined for their dynamic response in a compression stress relaxation device [7][8][9]. The unit used by METSS was fabricated by Akron Rubber Development Labs specifically to handle both fluid environmental exposures and cyclic thermal behavior.…”

Section: Test Proceduresmentioning

confidence: 99%

Hydrocarbon stability of perfluorinated polyether rubbers at elevated temperatures

et al. 2005

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Recently introduced perfluorinated polyether rubbers have been found to be useful materials for use as o-rings in harsh environments. They have a very broad range of thermal utility, -55°C to 200°C, and exhibit strong resistance to harsh chemical environments over the entire temperature range. The data presented here demonstrate the excellent high and low temperature performance of perfluorinated polyether rubbers after extended exposures to jet fuel and synthetic hydraulic fluids. Demonstration of an appreciable degree of retained sealing force by molded o-rings down to -40°C is shown in a compression stress relaxation device. Perfluorinated polyether o-rings are demonstrated to offer significant improvement in performance over current nitrile-based o-ring materials. POLYM. ENG. SCI., 45: 1622-1629, 2005.

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“…The jig modified in the manner described by Dyneon was used. The background to the modified jig design is described in [5,6]. Among other things, the modified jig allows improved access of liquid media to the specimens.…”

Section: Description and Comparison Of The Csr Measuring Methods Usedmentioning

confidence: 99%

Comparison of Various CSR Methods regarding the Static Long-term Sealing Behaviour of AEM, ACM and HNBR Compounds

Hornig

2010

International Polymer Science and Technology

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The purpose of this study is to provide a guide to the various methods for compression stress relaxation testing (CSR testing), to assessing the influences of various parameters on the measurement results and to understanding different evaluation variants. It also presents a measuring method developed by ElringKlinger AG together with its various evaluation options. As the experiments in this study show, CSR compression methods developed by Shawbury-Wallace, Wykeham-Farrance and Jamak, which often produce very different static long-term sealing force curves, can be replicated sufficiently accurately by the EK method if the right evaluation variant is chosen. In addition, identical compression stress conditions must be established in the specimen by means of its geometrical design. The CSR methods are surprisingly simple to use and versatile in terms of the choice of test parameters and conditions. The various CSR measuring methods are used to plot the static long-term sealing force curves for AEM, ACM and HNBR compounds in hot air and in SF105G engine test oil. The influences of materials and sealing profiles in CSR testing are also discussed.

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Compression Stress Relaxation Testing - Comparisons, Methods, and Correlations

Cited by 6 publications

References 2 publications

Evaluation of properties of elastomer seal for fuel systems exposed to effects of rapeseed methyl ester

Evaluation of properties of elastomer seal for fuel systems exposed to effects of rapeseed methyl ester

Hydrocarbon stability of perfluorinated polyether rubbers at elevated temperatures

Comparison of Various CSR Methods regarding the Static Long-term Sealing Behaviour of AEM, ACM and HNBR Compounds

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