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A method for establishing 3-D random aggregate and random mechanical parameters model on meso-level was proposed. Two numerical models of concrete beam specimens with ANSYS were established. By the flexural numerical simulation of two models, the gradual damage process, the arising and growth of crack were simulated in space. Influences of random distribution of aggregates and heterogeneity of material...
Background, aim, and scope Land-use change can significantly influence carbon (C) storage and fluxes in terrestrial ecosystems. Soil–plant systems can act as sinks or sources of atmospheric CO2 depending on formation and decomposition rates of soil organic matter. Therefore, changes in tropical soil C pools could have significant impacts on the global C cycle. This study aims to evaluate the impacts...
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