期刊
RESULTS IN PHYSICS
卷 15, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.rinp.2019.102561
关键词
Phase diagram; Geometric features; Breathing crack; Cantilever beam
资金
- Tianjin Natural Science Foundation of China [17JCYBJC18800]
- National Natural Science Foundation of China [11872274, 11702188, 11802208]
Geometric features of the phase diagram of a cantilever beam with a breathing crack are investigated. Influences of crack properties on the phase diagram geometry are studied and a method for crack identification based on phase diagram features is proposed. The pixel method is used to estimate different phase diagram areas. Multiple crack identification indexes are defined under the conditions of primary and super-harmonic resonance. The effects of crack location and depth on each index are analyzed. The contour lines for multiple identification indexes are used to estimate crack parameters. Numerical calculations indicate that the phase diagrams for super-harmonic resonance are more sensitive to crack parameters and that the proposed method is both feasible and effective.
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