Session: CS-10-04 Recent Developments in Chinese Codes and Standards-4

Paper Number: 154764

154764 - Analysis of Factors Affecting Fatigue Crack Growth Life in Hydrogen Storage Vessels 

Abstract: 

In this paper, we firstly make a comparative analysis of the axial crack growth life calculation methods of GB/T 19624 and ASME Ⅷ-3 in the inner wall of the cylinder, and analyze the influence of two different calculation processes, namely, step-by-step accumulation and step-by-step iteration, on the results of fatigue analysis. The results show that only the difference in calculation process does not affect the results of crack growth life calculation. Subsequently, based on the methods in the two standards, the effects of different stress intensity factor (KI) calculation methods and fatigue crack growth rate models on the fatigue analysis results are investigated. The results show that the KI calculated by the ASME Ⅷ-3 method is larger than the KI calculated by the GB/T 19624 method, resulting in the crack growth life calculated by ASME Ⅷ-3 being smaller than that calculated by GB/T 19624.The fatigue crack growth rate model in ASME Ⅷ-3 is more conservative than that of GB/T 19624. Finally, the effects of loading conditions, material parameters and vessel geometry on the fatigue evaluation results are investigated. The results show that a decrease in material fracture toughness, yield strength and wall thickness all lead to a decrease in fatigue life. Fatigue life increases rapidly with increasing pressure ratio. Fatigue life shows the greatest sensitivity to the fatigue crack growth rate parameter, and small changes in the fatigue crack growth rate parameter can have a large effect on fatigue life. When carrying out the design of hydrogen storage vessel, the influence of the fatigue crack growth rate parameter on fatigue life should be emphasized.

Presenting Author: Xiaoliang Jia China Special Equipment Inspection & Research Institute

Presenting Author Biography: My name is Jia Xiaoliang. I work at the Structural Research Institute. I am mainly responsible for the maintenance of the standard system of the national Boiler and pressure Vessel Standardization Technical Committee. In technology, I am mainly engaged in the research of standardization of pressure vessel design method based on failure mode. At present, my main work direction is the research of hydrogen storage pressure vessels and ultrahigh pressure vessels based on analysis.

Authors:

Xiaoliang Jia China Special Equipment Inspection & Research Institute
Fang Ji China Special Equipment Inspection & Research Institute
Yunmeng Zhou China Special Equipment Inspection & Research Institute
Zhiwei Chen China Special Equipment Inspection & Research Institute
Xiang Li China Special Equipment Inspection & Research Institute
Jinhui Wang China Special Equipment Inspection & Research Institute
Kai Wang China Special Equipment Inspection & Research Institute
Honglian Ma China Special Equipment Inspection & Research Institute