Title:
METHOD FOR EVALUATING TOUGHNESS RELIABILITY OF TANK
Document Type and Number:
WIPO Patent Application WO/2024/024680
Kind Code:
A1
Abstract:
This method for evaluating toughness reliability of a tank includes a step for acquiring a required fracture toughness value on the basis of a change over time in a stress intensity factor and a design life of the tank, a step for acquiring a material transition temperature from a Charpy transition curve that is based on a Charpy impact test of the tank, a step for acquiring a fracture toughness value on the basis of a fracture toughness test of the tank material, a step for acquiring a design tolerance condition on the basis of a relationship between a fracture toughness value at each test temperature and a temperature index which is the inverse of a difference between each test temperature and a transition temperature, a step for acquiring a required temperature index on the basis of the design tolerance condition and the required fracture toughness value, a step for acquiring a tolerance Charpy transition curve having a transition temperature that is based on the required temperature index, and a step for evaluating the toughness reliability of the tank material on the basis of the tolerance Charpy transition curve.
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Inventors:
WATANABE MICHIHISA (JP)
KUBO TOSHIYUKI (JP)
KUBO TOSHIYUKI (JP)
Application Number:
PCT/JP2023/026827
Publication Date:
February 01, 2024
Filing Date:
July 21, 2023
Export Citation:
Assignee:
MITSUBISHI SHIPBUILDING CO LTD (JP)
International Classes:
G01N3/30; G01N3/31
Domestic Patent References:
| WO2010038305A1 | 2010-04-08 |
Foreign References:
| JP2018173356A | 2018-11-08 | |||
| JP2000241323A | 2000-09-08 | |||
| JP2007155540A | 2007-06-21 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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