期刊
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
卷 94, 期 -, 页码 68-87出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jmps.2016.04.025
关键词
Post-buckling; Bifurcation; Core-shell cylinder; Axisymmetric pattern; Diamond-like pattern; Path-following technique
资金
- Fudan University
- French National Research Agency ANR (LabEx DAMAS) [ANR-11-LABX-0008-01]
Recent interests in curvature-and stress-induced pattern formation and pattern selection motivate the present study. Surface morphological wrinkling of a cylindrical shell supported by a soft core subjected to axial compression is investigated based on a nonlinear 3D finite element model. The post-buckling behavior of core-shell cylinders beyond the first bifurcation often leads to complicated responses with surface mode transitions. The proposed finite element framework allows predicting and tracing these bifurcation portraits from a quantitative standpoint. The occurrence and evolution of 3D instability modes including sinusoidally deformed axisymmetric patterns and non-axisymmetric diamond-like modes will be highlighted according to critical dimensionless parameters. Besides, the phase diagram obtained from dimensional analyses and numerical results could be used to guide the design of core-shell cylindrical systems to achieve the desired instability patterns. (C) 2016 Elsevier Ltd. All rights reserved.
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