Method and Apparatus for Evaluating Ductile Fracture

摘要

An object of the invention is to provide a simple method and apparatus for evaluating a collapse load of a structure with respect to ductile fracture in the case where a plurality of flaws exist in a cylindrical structure that receives a bending load. The invention is an evaluation method and apparatus in which a result obtained by calculating a collapse load while a flaw having the largest area among a plurality of flaws is considered as a single flaw and a result obtained by replacing a plurality of flaws with penetration flaws corresponding to the plurality of flaws and calculating a collapse load are compared with each other and the smallest collapse load is set to be a collapse load of a structure.

主权项

1. A method for evaluating ductile fracture in the case where a cylindrical structure in which a plurality of circumferential flaws exist receives a bending load, wherein
a first collapse load and a second collapse load are compared with each other and the minimum collapse load is set to be a collapse load of the cylindrical structure, the first collapse load being calculated while a flaw having the largest area among a plurality of flaws in the same plane of the cylindrical structure is considered as a single flaw, the second collapse load being calculated by modelling the plurality of flaws in the same plane of the cylindrical structure into symmetrical penetration flaws corresponding to the plurality of flaws.