Peridynamic modeling for impact failure of wet concrete considering the influence of saturation

Abstract

In this paper, a modified intermediately homogenized peridynamic (IH-PD) model for analyzing impact failure of wet concrete has been presented under the configuration of ordinary state-based peridynamic theory. The meso-structural properties of concrete are linked to the macroscopic mechanical behavior in the IH-PD model, where the heterogeneity of concrete is taken into account, and the calculation cost does not increase. Simultaneously, the porosity of concrete is considered, which is implemented by deleting the bond between two material points, as well as the influence of porosity on the mechanical properties of concrete. Moreover, the effective bulk and shear modulus of cement mortar in wet concrete (saturated and unsaturated concrete) are calculated respectively. The dynamic model for wet concrete is described from three aspects: strength, dynamic increase factor, and equation of state. Validation of the proposed model is established through analyzing some benchmark tests and comparing with the corresponding experiment and other available numerical results.

A multi-scale model from microscopic cracks to macroscopic damage of concrete at elevated temperatures

“…Nowadays, concrete has long been used in various engineering structures such as buildings, utility tunnels, nuclear power plants, and so on (Ahmed et al., 2021; Bai et al., 2022a; Bao et al., 2023; Castillo et al., 2021; Park et al., 2022; Shen et al.,2021; Sun, 2022; Sun et al., 2020; Sun and Xu, 2022; Voyiadjis et al., 2022; Wu et al., 2022; Xu et al., 2018). During the service periods of the engineering structures, fire risk is unavoidable (Aslani and Samali, 2015; Nuruzzaman et al., 2023; Sun et al., 2022a; 2023).…”