Evaluation on parallel surface crack propagation and coalescence.
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概要
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Higher levels of safety are recently required of such structures as nuclear power plant components, aircrafts, liquified natural gas carrier, etc., with an emphasis on the "leak-before-break" philosophy. The ASME Boiler and Pressure Vessel Code was the first case to incorporate this concept in the form of rule in its Section XI. In terms of rule requirements, however, there still remains much to be addressed and explored.This paper discusses the evaluation technique for parallel surface crack propagation and coalescence proposed by the DBA-84 committee in HPI.The validity of this technique was verified by applying it to experimental test data obtained by the AFC Sub-committee in JWES.For comparison, the ASME Code was applied to the same problem. In addition, the detailed simulation analysis for parallel surface crack propagation was made by modeling the mutual interaction effect of parallel surface cracks at the plate surface as that of parallel through cracks.
- 一般社団法人 日本高圧力技術協会の論文