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- Koemmling, AnjaBundesanstalt Mat Forsch & Prufung, D-12200 Berlin, Germany. (author)
Analysis of O-Ring Seal Failure under Static Conditions and Determination of End-of-Lifetime Criterion
- Article/chapterEnglish2019
Publisher, publication year, extent ...
- 2019-07-29
- MDPI,2019
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:kth-261040
- https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-261040URI
- https://doi.org/10.3390/polym11081251DOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- QC 20191002
- 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 and genre
- NATURVETENSKAP Kemi Polymerkemi hsv//swe
- NATURAL SCIENCES Chemical Sciences Polymer Chemistry hsv//eng
- EPDM
- HNBR
- seal failure
- leak-tightness
- DLO
- oxygen permeability
- DMA
- indenter modulus
Added entries (persons, corporate bodies, meetings, titles ...)
- Jaunich, MatthiasBundesanstalt Mat Forsch & Prufung, D-12200 Berlin, Germany. (author)
- Pourmand, PayamKTH,Fiber- och polymerteknologi(Swepub:kth)u1v951wj (author)
- Wolff, DietmarBundesanstalt Mat Forsch & Prufung, D-12200 Berlin, Germany. (author)
- Hedenqvist, Mikael S.KTH,Fiber- och polymerteknologi(Swepub:kth)u10rkaxe (author)
- Bundesanstalt Mat Forsch & Prufung, D-12200 Berlin, Germany.Fiber- och polymerteknologi (creator_code:org_t)
Related titles
- In:Polymers: MDPI11:82073-4360
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