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Computational approach to localization using global energy minimization
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UNSPECIFIED (2000) Computational approach to localization using global energy minimization. COMPUTERS & STRUCTURES, 78 (4). pp. 529-536. ISSN 0045-7949.
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Abstract
Damage localization induced by strain softening can be predicted by the direct minimization of a global energy function [Baker G, Hunt GW. In: Bazant ZP, et al., editors. Damage of Quasi-brittle Structures. London: E and FN Spon, 1994. p. 387-94; Hunt GW, Baker G. J Mech Phys Solids 1995;43(7):1127-50]. This article concerns the computational strategy for implementing this principle for softening materials such as concrete. Instead of using heuristic global optimization techniques, our strategies are a hybrid of local optimization methods with a path-finding approach to ensure a global optimum. With admissible nodal displacements being independent variables, it is easy to deal with the geometric (mesh) constraint conditions. The direct search optimization methods recover the localized solutions for a range of softening lattice models which are representative of the quasi-brittle structures. (C) 2000 Elsevier Science Ltd. All rights reserved.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software T Technology > TA Engineering (General). Civil engineering (General) |
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Journal or Publication Title: | COMPUTERS & STRUCTURES | ||||
Publisher: | PERGAMON-ELSEVIER SCIENCE LTD | ||||
ISSN: | 0045-7949 | ||||
Official Date: | December 2000 | ||||
Dates: |
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Volume: | 78 | ||||
Number: | 4 | ||||
Number of Pages: | 8 | ||||
Page Range: | pp. 529-536 | ||||
Publication Status: | Published |
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