Computational approach to localization using global energy minimization
Chen, G., Baker, G. , & Hunt, G.W. (2000) Computational approach to localization using global energy minimization. Computers & Structures, 78(4), pp. 529-536.
Damage localization induced by strain softening can be predicted by the direct minimization of a global energy function. 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 quasi-brittle structures
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|Item Type:||Journal Article|
|Keywords:||cracks, fracture mechanics, minimisation, structural engineering computing|
|Divisions:||Past > Institutes > Institute for Creative Industries and Innovation|
|Copyright Owner:||Copyright 2000 Elsevier|
|Deposited On:||23 Oct 2009 11:28|
|Last Modified:||11 Aug 2011 00:49|
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