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Analysis of O-Ring ...
Analysis of O-Ring Seal Failure under Static Conditions and Determination of End-of-Lifetime Criterion
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- Koemmling, Anja (author)
- Bundesanstalt Mat Forsch & Prufung, D-12200 Berlin, Germany.
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- Jaunich, Matthias (author)
- Bundesanstalt Mat Forsch & Prufung, D-12200 Berlin, Germany.
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- Pourmand, Payam (author)
- KTH,Fiber- och polymerteknologi
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- Wolff, Dietmar (author)
- Bundesanstalt Mat Forsch & Prufung, D-12200 Berlin, Germany.
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- Hedenqvist, Mikael S. (author)
- KTH,Fiber- och polymerteknologi
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Bundesanstalt Mat Forsch & Prufung, D-12200 Berlin, Germany Fiber- och polymerteknologi (creator_code:org_t)
- 2019-07-29
- 2019
- English.
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In: Polymers. - : MDPI. - 2073-4360. ; 11:8
- Related links:
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https://www.mdpi.com...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Subject headings
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- Determining a suitable and reliable end-of-lifetime criterion for O-ring seals is an important issue for long-term seal applications. Therefore, seal failure of ethylene propylene diene rubber (EPDM) and hydrogenated nitrile butadiene rubber (HNBR) O-rings aged in the compressed state at 125 degrees C and at 150 degrees C for up to 1.5 years was analyzed and investigated under static conditions, using both non-lubricated and lubricated seals. Changes of the material properties were analyzed with dynamic-mechanical analysis and permeability experiments. Indenter modulus measurements were used to investigate DLO effects. It became clear that O-rings can remain leak-tight under static conditions even when material properties have already degraded considerably, especially when adhesion effects are encountered. As a feasible and reliable end-of-lifetime criterion for O-ring seals under static conditions should include a safety margin for slight dimensional changes, a modified leakage test involving a small and rapid partial decompression of the seal was introduced that enabled determining a more realistic but still conservative end-of-lifetime criterion for an EPDM seal.
Subject headings
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
Keyword
- EPDM
- HNBR
- seal failure
- leak-tightness
- DLO
- oxygen permeability
- DMA
- indenter modulus
Publication and Content Type
- ref (subject category)
- art (subject category)
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