Scaling of structural failure
This article attempts to review the progress achieved in the understanding of scaling and size ef-fect in the failure of structures. Particular emphasis is placed on quasi brittle materials for which the size etTect is important and complicated. After reflections on the long history of size effect s...
| Main Authors: | , |
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| Format: | Text |
| Language: | English |
| Published: |
1997
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.694.3435 http://www.civil.northwestern.edu/people/bazant/PDFs/Papers/S34.pdf |
| Summary: | This article attempts to review the progress achieved in the understanding of scaling and size ef-fect in the failure of structures. Particular emphasis is placed on quasi brittle materials for which the size etTect is important and complicated. After reflections on the long history of size effect studies, attention is focused on three main types of size effects, namely the statistical size effect due to randomness of strength, the energy release size effect, and the possible size effect due to fractality of fracture or microcracks. Definitive conclusions on the applicability of these theories are drawn. Subsequently, the article discusses the application of the known size effect law for the measurement of material fracture properties, and the modeling of the size effect by the cohesive crack model, non local finite element models and discrete element models. Extensions to com-pression failure and to the rate-dependent material behavior are also outlined. The damage con-stitutive law needed for describing a microcracked material in the fracture process zone is dis-cussed. Various applications to quasibrittle materials, including concrete, sea ice, fiber compos-ites, rocks and ceramics are presented. There are 377 references included in this article. 1 |
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