TY  - JOUR
AU  - Akulichev, A. G.
AU  - Echtermeyer, A. T.
AU  - Persson, Bo
TI  - Interfacial leakage of elastomer seals at low temperatures
JO  - International journal of pressure vessels and piping
VL  - 160
SN  - 0308-0161
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2019-01234
SP  - 14 - 23
PY  - 2018
AB  - Interfacial leakage of air in hydrogenated nitrile butadiene rubber (HNBR) O-ring seals exposed to sub-ambient temperatures is studied. Flange-type fixtures with sealing surfaces produced by 3 different surface finish processes are used. When the seals are cooled down to temperatures below the elastomer glass transition point of (−23 °C), an abrupt increase of air leakage () is observed. The effects of surface finish conditions, compression ratio, grease lubrication and additions of carbon black in the HNBR on the cold leakage are discussed. Persson's contact mechanics and effective medium leakage theory coupled with finite element analysis (FEA) of the HNBR seals are utilized to capture the changes in the contact area and pressure with cooling and predict the seal failure temperatures. The main cause for the cold seal failures is believed to be the detachment of the elastomer seals from their mating sealing parts due to the elastomer thermal contraction and the negligible recovery of the HNBR in cold environment. In addition, the adhesive rubber-substrate interface influences the detachment and seal failure.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000425203600002
DO  - DOI:10.1016/j.ijpvp.2017.11.014
UR  - https://juser.fz-juelich.de/record/860480
ER  -