| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method by which damage in a weld zone under a multiaxial stress state can be accurately predicted responsive to a heat-resistant steel weld zone used actually. <P>SOLUTION: In a damage prediction method for a heat-resistant steel weld zone, by which the distribution of stress acting on the heat-resistant steel weld zone is calculated and damage in the heat-resistant steel weld zone is predicted from the calculated value, as a parameter representing a stress state of the heat-resistant steel weld zone, M is used which is represented by M=A×σ<SB POS="POST">1</SB>×TF<SP POS="POST">B</SP>(A, B: coefficient, σ<SB POS="POST">1</SB>: maximum main stress, TF: stress multiaxial degree coefficient), thereby accurately predicting damage in a weld heat affected zone in a complicated stress state responsive to a heat-resistant steel weld zone used actually. Specifically, a relationship (a) between the parameter M and an increase speed of a number density of creep voids or a relationship (b) between the parameter M and an increase speed of an area ratio of creep voids is predetermined and the relationship (a) or (b) is used to estimate the number density of creep voids or the area ratio of creep voids. <P>COPYRIGHT: (C)2012,JPO&INPIT |
