Title:
METHOD FOR CALCULATING SPHERICAL SHELL SURFACE THREE-DIMENSIONAL CRACK PROPAGATION FATIGUE LIFE
Document Type and Number:
WIPO Patent Application WO/2022/121203
Kind Code:
A1
Abstract:
A method for calculating spherical shell surface three-dimensional crack propagation fatigue life. The method comprises the following steps: establishing a complete spherical pressure-resistant shell initial geometric model; endowing the spherical shell model with material parameters and section attributes, dividing grids, and setting boundary and load conditions; establishing an initial crack model; endowing the crack model with material parameters, defining section attributes, dividing grids and determining the positions thereof; importing the two models to generate a complete spherical shell finite element numerical model locally containing surface crack defects; solving an initial crack leading edge stress intensity factor numerical value by using an M integral method; reading and running a fatigue life calculation model program; setting automatic crack propagation parameters; and obtaining a spherical shell surface three-dimensional crack propagation fatigue life numerical value based on a self-defined propagation program. According to the method, finite element analysis software and fracture mechanics analysis software are combined to calculate the spherical shell surface three-dimensional crack propagation fatigue life, and the applicability of the method is verified by means of numerical simulation.
Inventors:
LI RUJUN (CN)
ZHU YONGMEI (CN)
YU JIAFU (CN)
TANG WENXIAN (CN)
YANG JIAHAO (CN)
YUE LIN (CN)
ZHU YONGMEI (CN)
YU JIAFU (CN)
TANG WENXIAN (CN)
YANG JIAHAO (CN)
YUE LIN (CN)
Application Number:
PCT/CN2021/087820
Publication Date:
June 16, 2022
Filing Date:
April 16, 2021
Export Citation:
Assignee:
UNIV JIANGSU SCIENCE & TECH (CN)
International Classes:
G06F30/15; G06T17/20
Foreign References:
| CN112417606A | 2021-02-26 | |||
| CN103020426A | 2013-04-03 | |||
| US20190054573A1 | 2019-02-21 |
Other References:
ZHU, YONG-MEI ET AL.: "Effect of Stress Intensity Factor on Surface Crack of Deep-sea Spherical Shell", JOURNAL OF SHIP MECHANICS, vol. 24, no. 3, 15 March 2020 (2020-03-15), pages 371 - 379, XP055941089, ISSN: 1007-7294
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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