EStimation of critical pressure of decompression failure of epdm composites for sealing under high-pressure hydrogen gas

J. Yamabe, Shin Nishimura

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

To clarify the relationship between the decompression failure behaviours of EPDM and the nature of their reinforcement fillers, EPDM composites were exposed to hydrogen gas at 30 °C and up to 10 MPa. Optical microscopic studies of the interiors of composites showed that cracks initiated as a result of stress concentrations from micrometre-sized bubbles formed by supersaturated hydrogen after decompression. The critical pressure (pFat which no cracks initiated after decompression was determined. Each bubble was regarded as a disc-like cavity with an internal pressure, and its tearing energy (Twas calculated by the finite-element method. The critical inner pressure (II Fwas then calculated on the basis of the criterion that T ≫; Ts,th (the threshold tearing energy for a static crack. The critical hydrogen pressures of unfilled and silica-filled EPDM could be successfully estimated because pF ∼ IIF. However, for the carbon black-filled composite (CBP the value of IIF was about twice that of pF. It is considered that the internal pressure of bubbles (IIbecame higher than the applied pressure of hydrogen (pin terms of absorbed hydrogen on carbon black in CBP, unlike unfilled or silica-filled composites.

Original languageEnglish
Publication statusPublished - Dec 1 2010
Event18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010 - Dresden, Germany
Duration: Aug 30 2010Sep 3 2010

Other

Other18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010
CountryGermany
CityDresden
Period8/30/109/3/10

Fingerprint

Hydrogen
Composite materials
Gases
Carbon black
Cracks
Silica
Fillers
Stress concentration
Reinforcement
Finite element method

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials

Cite this

Yamabe, J., & Nishimura, S. (2010). EStimation of critical pressure of decompression failure of epdm composites for sealing under high-pressure hydrogen gas. Paper presented at 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010, Dresden, Germany.

EStimation of critical pressure of decompression failure of epdm composites for sealing under high-pressure hydrogen gas. / Yamabe, J.; Nishimura, Shin.

2010. Paper presented at 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010, Dresden, Germany.

Research output: Contribution to conferencePaper

Yamabe, J & Nishimura, S 2010, 'EStimation of critical pressure of decompression failure of epdm composites for sealing under high-pressure hydrogen gas' Paper presented at 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010, Dresden, Germany, 8/30/10 - 9/3/10, .
Yamabe J, Nishimura S. EStimation of critical pressure of decompression failure of epdm composites for sealing under high-pressure hydrogen gas. 2010. Paper presented at 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010, Dresden, Germany.
Yamabe, J. ; Nishimura, Shin. / EStimation of critical pressure of decompression failure of epdm composites for sealing under high-pressure hydrogen gas. Paper presented at 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010, Dresden, Germany.
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