1,721,012 research outputs found
A multiscale model for the numerical simulation of the anchor bolt pull-out test in lightweight aggregate concrete
No full textA multiscale failure analysis of masonry structures subjected to in-plane loading conditions
No full textA two-scale failure analysis of composite materials in presence of fiber/matrix crack initiation and propagation
No full textAdaptive multiscale modeling of fiber-reinforced composite materials subjected to transverse microcracking
No full textA novel approach based on ALE and delamination fracture mechanics for multilayered composite beams
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Mixed-mode fracture in lightweight aggregate concrete by using a moving mesh approach within a multiscale framework
No full textLightweight aggregate concrete (LWAC) has gained popularity as an alternative to ordinary concrete for structural purposes, due to its higher strength-to-weight ratio. The present work aims to present novel numerical results of complete failure simulations performed on pre-cracked beams made of LWAC, subjected to a mixed-mode fracture test. To this end, an innovative simulation algorithm for crack propagation within a multiscale framework has been adopted, specifically conceived for predicting micro-cracking in quasi-brittle heterogeneous materials under general loading conditions; such a strategy allows to take into account both the continuous crack propagation along a non-prescribed path and the crack penetration through a material interface. Path tracking for continuous crack propagation has been performed by using an advanced geometry optimization method coupling a moving mesh approach and a gradient-free optimization solver, whereas crack penetration has been simulated by means of a simplified re-initiation criterion at the interface, involving a material characteristic length. Several numerical experiments have been carried out, in order to investigate the influence of the Young's modulus of lightweight aggregates on the peak and post-peak behavior. These results have been validated by comparing them with those obtained from fully homogenized analyses based on the LEFM approach
Effects of microfracture and contact induced instabilities on the macroscopic response of finitely deformed elastic composites
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Prediction of microscopic interface crack onset in fiber-reinforced composites by using a multi-scale homogenization procedure
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