期刊
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
卷 130, 期 -, 页码 232-247出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2017.09.029
关键词
Cylindrical shell; Geometric imperfection; Fourier series; Buckling test; Knockdown factor (KDF)
类别
资金
- National Basic Research Program of China [2014CB049000]
- National Natural Science Foundation of China [11372062, 11772078, 11402049]
- China Postdoctoral Science Foundation [2015T80246]
Imperfections from manufacturing process can cause a scattered reduction of the load-carrying capacity or buckling load of axially compressed cylindrical shell structures. To isolate the influence of geometric imperfections from other imperfections such as welding, a sub-scaled, integrally manufactured cylindrical shell with small-amplitude geometric imperfection was manufactured, analyzed and tested in this study. A test facility and measurement system (including imperfection measurement and buckling test) were constructed. Finite element (FA) numerical procedure:for predicting the buckling load was developed. Results indicate that the buckling load predicted by the FE analysis is very close to that from the test. Knockdown factor (KDF) is discussed with reference to the NASA design document. Furthermore, the influence of pure geometric imperfections including imperfection component and amplitude on the buckling behavior is discussed based on Fourier series method. Some guidance for the dimensional tolerance in manufacturing process relating to the load-carrying capacity of thin-walled structures is provided. (C) 2017 Elsevier Ltd. All rights reserved.
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