水素脆化進行度の評価方法及び水素脆化進行度評価装置 - Nippon Telegraph and Telephone Corporation

Title:

水素脆化進行度の評価方法及び水素脆化進行度評価装置

Document Type and Number:

Japanese Patent JP7108214

Kind Code:

B2

Abstract:

A cumulative distribution function of fracture time is calculated from large quantities of hydrogen embrittlement fracture test data measured under test conditions that assume reinforcing bars in prestressed concrete, transition probability is calculated from the cumulative distribution function of fracture time with a hydrogen embrittlement fracture being regarded as a stochastic process through which a degraded state progressively reaches a fractured state, and the time integral of the transition probability is found as the degree of progress of hydrogen embrittlement.

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Inventors:

Takuya Uesho
Ryota Ishii
Yosuke Takeuchi
Masayuki Tsuda

Application Number:

JP2020550356A

Publication Date:

July 28, 2022

Filing Date:

September 26, 2019

Export Citation:

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Assignee:

Nippon Telegraph and Telephone Corporation

International Classes:

G01N33/2045; G01N17/00

Domestic Patent References:

JP2017219532A
JP2004340817A
JP2016045158A
JP2004309197A

Foreign References:

US20120024077

Other References:

和泉正哲ほか,確率過程理論に基づいたコンクリートの破壊理論 Part I,日本建築学会論文報告集,1980年01月30日,第287巻,pp.1-13
HAMID, M. et al.,Evaluating the susceptibility of steels to hydrogen embrittlement using statistical analysis,JOURNAL OF MATERIALS SCIENCE,1988年,Vol.23,pp.3688-3691

Attorney, Agent or Firm:

Hidekazu Miyoshi
Rie Kudo

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