Abstract
Concrete materials are known to exhibit viscoelastic effects. Using a cohesive zone model, we will study the evolution of a crack in concrete as it creeps by the influence of an external load. The normal stress on the cohesive zone satisfies a history-dependent yield condition, which is represented in the form of a nonlinear Abel-type integral operator in time. The external load will be time dependent in the form of a polynomial function. Initially, the crack will remain constant in time while the cohesive zone will propagate. When a delay time is reached, the crack will also start propagating. The stresses acting on the cohesive zones are time and history dependent which plays a role in the rate of crack growth. The results for concrete will be compared to those obtained for a polymer.
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Hakim, L. (2019). Modelling Creep in Concrete Under a Variable External Load. In: Constanda, C., Harris, P. (eds) Integral Methods in Science and Engineering. Birkhäuser, Cham. https://doi.org/10.1007/978-3-030-16077-7_12
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DOI: https://doi.org/10.1007/978-3-030-16077-7_12
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