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http://dx.doi.org/10.20466/KPVP.2020.16.2.035

Development of Elastic-Plastic Fracture Mechanics Evaluation Program for Leak-Before-Break Analysis of Nuclear Piping  

Park, Jun-Geun (서울과학기술대학교 기계시스템디자인공학과)
Huh, Nam-Su (서울과학기술대학교 기계시스템디자인공학과)
Kim, Ye-Ji (한국원자력안전기술원 기계재료평가실)
Lee, Sang-Min (한국원자력안전기술원 영광주재검사팀)
Publication Information
Transactions of the Korean Society of Pressure Vessels and Piping / v.16, no.2, 2020 , pp. 35-46 More about this Journal
Abstract
In this paper, a fracture mechanics evaluation system which can be used to assess the leak-before-break (LBB) of nuclear piping is developed. Existing solutions for calculating the fracture mechanics parameters (J-integral and crack opening displacement) required for LBB evaluation were firstly presented. Then a module for calculating J-integral and COD was developed, with an additional module for predicting the critical load based on the crack driving force diagram to finally develop a fracture mechanics evaluation system. To confirm the validity of the proposed evaluation system, finite element (FE) analysis was performed, and the FE J-integral and COD results were compared with prediction results using the J-integral and COD estimations program. Furthermore, the critical load assessment module was verified by comparing the actual pipe test results (Battelle test data) with prediction results using the proposed program.
Keywords
Leak-Before-Break; J-integral; Crack Opening Displacement; Crack Driving Force Diagram;
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