Influence of repetitions of the high-pressure hydrogen gas exposure on the internal damage quantity of high-density polyethylene evaluated by transmitted light digital image

Hiroaki Ono, Hirotada Fujiwara, Kiyoaki Onoue, Shin Nishimura

Research output: Contribution to journalArticle

Abstract

A quantitative evaluation of the bulk damage level after high-pressure hydrogen exposure for the hydrogen compatible polymeric materials are developed. The bulk damage level of the internal damage induced by high-density polyethylene (HDPE) after 90 MPa hydrogen exposure repetition were evaluated. Based on the light scattering by the internal damage, we established a quantitative damage index in terms of the light transmittance as brightness (B) of transmitted light digital image of the HDPE disk specimen; the relative extinction ratio of transmitted light intensity (βr) as the brightness change ratio. βr was obtained for each pixel of the image for whole specimen. According to the results of the specimen, βr around the central region of specimen was higher than that of the edge region. Averaged βr around the center of specimen (βr¯) logarithmically increased with the increase in exposure number (Nex). Judging from the results, the internal damage tends to generate at the center of specimen, and the internal damage amount increased with increase in Nex.

Original languageEnglish
Pages (from-to)23303-23319
Number of pages17
JournalInternational Journal of Hydrogen Energy
Volume44
Issue number41
DOIs
Publication statusPublished - Aug 30 2019

Fingerprint

High density polyethylenes
polyethylenes
repetition
damage
Hydrogen
Luminance
hydrogen
Gases
gases
Light extinction
Light scattering
Pixels
brightness
Polymers
luminous intensity
transmittance
extinction
light scattering
pixels
evaluation

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

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title = "Influence of repetitions of the high-pressure hydrogen gas exposure on the internal damage quantity of high-density polyethylene evaluated by transmitted light digital image",
abstract = "A quantitative evaluation of the bulk damage level after high-pressure hydrogen exposure for the hydrogen compatible polymeric materials are developed. The bulk damage level of the internal damage induced by high-density polyethylene (HDPE) after 90 MPa hydrogen exposure repetition were evaluated. Based on the light scattering by the internal damage, we established a quantitative damage index in terms of the light transmittance as brightness (B) of transmitted light digital image of the HDPE disk specimen; the relative extinction ratio of transmitted light intensity (βr) as the brightness change ratio. βr was obtained for each pixel of the image for whole specimen. According to the results of the specimen, βr around the central region of specimen was higher than that of the edge region. Averaged βr around the center of specimen (βr¯) logarithmically increased with the increase in exposure number (Nex). Judging from the results, the internal damage tends to generate at the center of specimen, and the internal damage amount increased with increase in Nex.",
author = "Hiroaki Ono and Hirotada Fujiwara and Kiyoaki Onoue and Shin Nishimura",
year = "2019",
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language = "English",
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T1 - Influence of repetitions of the high-pressure hydrogen gas exposure on the internal damage quantity of high-density polyethylene evaluated by transmitted light digital image

AU - Ono, Hiroaki

AU - Fujiwara, Hirotada

AU - Onoue, Kiyoaki

AU - Nishimura, Shin

PY - 2019/8/30

Y1 - 2019/8/30

N2 - A quantitative evaluation of the bulk damage level after high-pressure hydrogen exposure for the hydrogen compatible polymeric materials are developed. The bulk damage level of the internal damage induced by high-density polyethylene (HDPE) after 90 MPa hydrogen exposure repetition were evaluated. Based on the light scattering by the internal damage, we established a quantitative damage index in terms of the light transmittance as brightness (B) of transmitted light digital image of the HDPE disk specimen; the relative extinction ratio of transmitted light intensity (βr) as the brightness change ratio. βr was obtained for each pixel of the image for whole specimen. According to the results of the specimen, βr around the central region of specimen was higher than that of the edge region. Averaged βr around the center of specimen (βr¯) logarithmically increased with the increase in exposure number (Nex). Judging from the results, the internal damage tends to generate at the center of specimen, and the internal damage amount increased with increase in Nex.

AB - A quantitative evaluation of the bulk damage level after high-pressure hydrogen exposure for the hydrogen compatible polymeric materials are developed. The bulk damage level of the internal damage induced by high-density polyethylene (HDPE) after 90 MPa hydrogen exposure repetition were evaluated. Based on the light scattering by the internal damage, we established a quantitative damage index in terms of the light transmittance as brightness (B) of transmitted light digital image of the HDPE disk specimen; the relative extinction ratio of transmitted light intensity (βr) as the brightness change ratio. βr was obtained for each pixel of the image for whole specimen. According to the results of the specimen, βr around the central region of specimen was higher than that of the edge region. Averaged βr around the center of specimen (βr¯) logarithmically increased with the increase in exposure number (Nex). Judging from the results, the internal damage tends to generate at the center of specimen, and the internal damage amount increased with increase in Nex.

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