High-pressure hydrogen gas seal is one of key technologies for materialization of hydrogen energy system. It is important to understand the durability of high-pressure gas seal. According to the results of O-ring fracture, we found the three fracture modes, internal fracture of rubbers originated from inflation of dissolved hydrogen, referred as "Blister Fracture", external fracture in terms of volume inflation of rubber in the O-ring gland, referred as "Overflow Fracture" and "Buckling Fracture" Ethylene-propylene rubber (EPDM) and acrylonitrile-butadiene rubber (NBR) composites filled with carbon black, silica, and unfilled composites were exposed to high-pressure hydrogen gas. The blister fracture of composites with silica was less pronounced, irrespective of the hydrogen pressures. This can be attributed to their lower hydrogen content and higher strength than the others. Understanding the effect of decompression rate on the blister fracture is also important. The numerical analysis of blister fracture behavior during decompression process is undergoing.
|出版ステータス||出版済み - 6月 1 2015|
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