期刊
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
卷 160, 期 -, 页码 148-157出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2018.10.021
关键词
Pressure-impulse diagram; Deformation regimes; Negative phase; Saturated impulse
类别
资金
- National Natural Science Foundation of China [11372164, 11772176]
- QinetiQ
Pressure-impulse (or p - I) diagrams are developed for fully-clamped elastic-plastic beams subjected to pulse-pressure loading with varying degree of negative phase. Unlike traditional p - I diagrams, the loading parameter space are instead divided into regimes, corresponding to the three modes of deformation (I, II and III) observed in blast experiments. The effects of pulse shape, beam aspect ratio and negative phase loading on the isodamage curves that delineate the different regimes are investigated. In addition, it is further demonstrated that contour lines of structural performance (maximum deflection, total work done, partitioned energy and saturated) can also be incorporated into the non-dimensionalised pressure-impulse space to provide further information for the design, and assessment, of elastic-plastic beams to blast loading. (C) 2018 Elsevier Ltd. All rights reserved.
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