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https://doi.org/10.1016/j.ijsolstr.2009.08.025
Title: | Over-nonlocal gradient enhanced plastic-damage model for concrete | Authors: | Hien Poh, L. Swaddiwudhipong, S. |
Keywords: | Concrete Gradient models Localization Nonlocal continuum Plastic-damage models |
Issue Date: | 15-Dec-2009 | Citation: | Hien Poh, L., Swaddiwudhipong, S. (2009-12-15). Over-nonlocal gradient enhanced plastic-damage model for concrete. International Journal of Solids and Structures 46 (25-26) : 4369-4378. ScholarBank@NUS Repository. https://doi.org/10.1016/j.ijsolstr.2009.08.025 | Abstract: | Classical continuum models exhibit strong mesh dependency during softening. One method to regularize the problem is to introduce a length scale parameter via the nonlocal formulation. However, standard nonlocal enhancement (either by integral or gradient formulation) may serve only as a partial localization limiter for many material models. The "over-nonlocal" formulation, where the weight for the nonlocal value is greater than unity and the excesses compensated by assigning a negative weight to the local value, is able to fully regularize certain material models when standard nonlocal enhancement fails to do so. A plastic-damage model for concrete is formulated with this over-nonlocal enhancement via the gradient approach and the full regularizing capabilities demonstrated. © 2009 Elsevier Ltd. All rights reserved. | Source Title: | International Journal of Solids and Structures | URI: | http://scholarbank.nus.edu.sg/handle/10635/65958 | ISSN: | 00207683 | DOI: | 10.1016/j.ijsolstr.2009.08.025 |
Appears in Collections: | Staff Publications |
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