Purpose The purpose of this paper is to present a new method for determining the input parameters of the concrete damaged plasticity (CDP) model of ABAQUS standard software. The existing available methods in the literatures are case sensitive, i.e., they give different input parameters of CDP for a unique concrete class used in different finite element (FE) simulation of concrete structures. In this study, the authors attempt to introduce a new approach for the identification of the input parameters of the CDP model, which guarantees the uniqueness and precision of the model. In other words, by this method, the input parameters obtained for a specific concrete class with a unique characteristic strength can be used for FE simulation of the different concrete structures which were constructed by this concrete without the need to additional modifications raised from any new application. Design/methodology/approach For the input parameter identification of the CDP model, different standard tests of plain concrete are simulated by the ABAQUS standard software. These test simulations are performed for various set of input parameters. In the end, those set of input parameters which represents the best curve fitting with the experimental results is chosen as the optimum parameters. Findings By comparison of the FE simulation results obtained from the ABAQUS for two different concrete structures using the proposed input parameters for the CDP model with the experimental results, it was shown that the presented method for determining those parameters can guarantee the uniqueness and precision of the CDP model in simulation. Originality/value The method described for determining the input parameters of the CDP model of the ABAQUS standard software has not been previously presented.

Nanoparticles cadmium molybdate was prepared by ultrasonic method using cadmium(II) nitrate hexahydrate and ammonium heptamolybdate tetrahydrate were used as precursor materials. To the best of authors' knowledge, it is the first time that cadmium molybdate was synthesized by ultrasonic method. The as synthesized nanostructures were characterized by X-ray diffraction, scanning electron microscopy, X-ray energy dispersive spectroscopy, and ultraviolet-visible spectroscopy. To evaluate the catalytic properties of nanocrystalline cadmium molybdate, the photocatalytic degradation of 2-naphthol under visible light irradiation was carried out.

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