Title:
REPAIR METHOD AND MEMBER FOR REPAIR OF FATIGUE CRACK
Document Type and Number:
Japanese Patent JP2018140488
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a repair method for preventing crack reoccurrence from a hole end part by suppressing stress fluctuation width of the hole end part of a stop hole provided at a tip part of a fatigue crack.SOLUTION: A repair method of a fatigue crack includes: a step 1 for providing a stop hole 3 at a tip part of a fatigue crack 2 with respect to the fatigue crack 2 that occurs in a structure and/or providing a wedge hole 7 on a path other than a base part and the tip part of the fatigue crack; a step 2 for fitting wedge means 4 having a variable wedge load into the stop hole 3 and/or the wedge hole 7; and a step 3 for applying the wedge load for suppressing the stress fluctuation width of the structure of a hole end part of the stop hole 3 or the tip part of the fatigue crack 2.SELECTED DRAWING: Figure 13
Inventors:
TAKAHASHI KAZUHIKO
Application Number:
JP2018033803A
Publication Date:
September 13, 2018
Filing Date:
February 27, 2018
Export Citation:
Assignee:
PORT & AIRPORT RES INST
International Classes:
B23P6/04; B63B9/00; B63B43/00; E01D22/00
Domestic Patent References:
JPH0972097A | 1997-03-18 | |||
JPH0420839A | 1992-01-24 | |||
JP2010275707A | 2010-12-09 | |||
JPH1114536A | 1999-01-22 | |||
JP2008095759A | 2008-04-24 | |||
JPS515766A | 1976-01-17 | |||
JP2008157006A | 2008-07-10 | |||
JP2012083320A | 2012-04-26 |
Foreign References:
US2751671A | 1956-06-26 |
Attorney, Agent or Firm:
Shinichi Abe
Yoshihiro Shimizu
Yuji Tsujida
Takaaki Ota
Yoshihiro Shimizu
Yuji Tsujida
Takaaki Ota