Effect of free water content on the penetration of concrete

Zhao, Fengwen; Wen, He

doi:10.1016/j.ijimpeng.2018.06.007

Cited by 23 publications

(7 citation statements)

References 20 publications

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“…Indeed, additional material test data presented above lends further support to the accuracy of the new model. Moreover, it has been shown that the slightly different form of the DIF (from which the present form (Equation (A4)) was derived) has been successfully applied to other material systems such as concrete-like materials [40][41][42][43][44] and fiber-reinforced plastic laminates [45,46], which also shows that it levels out at very high strain rates. Indeed, it has been experimentally demonstrated that the form of DIF for concrete does level out at very high strain rates (for more details, see reference [44]).…”

Section: Appendix Amentioning

confidence: 89%

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A new Dynamic Plasticity and Failure Model for Metals

Lin

Wen

2019

Metals

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A new plasticity and failure model is developed herein for metallic materials subjected to dynamic loadings on the basis of the analysis of some available material test data and previous work. The new model consists of two parts: a strength model and a failure criterion. The strength model takes into consideration both tension and shear stress-strain relationships, as well as the effect of Lode angle, while the failure criterion takes into account both the effects of stress triaxiality and Lode angle. Furthermore, the effects of strain rate and temperature are also catered for in the model. In particular, new non-linear functions are suggested for the effects of strain rate and temperature in the strength model in order to describe accurately the mechanical behavior of metallic materials at very high loading rates and temperature. The new model is compared with available material test data for 2024-T351 aluminum alloy, 6061-T6 aluminum alloy, oxygen free high conductivity (OFHC) copper, 4340 steel, Ti-6Al-4V alloys, and Q235 mild steel in terms of stress–strain curves in both tension and shear, strain rate effect, temperature effect and fracture under different loading conditions. The new model is also compared with the JC constitutive model with the respective JC and BW fracture criteria by conducting numerical simulations of quasi-static smooth and notched bar tensile tests and ballistic perforation tests on 2024-T351 aluminum alloy in terms of cup and cone failure pattern, ballistic limit, residual velocity and failure mode. It transpires that the new plasticity and failure model can be used to predict the response and failure of metallic materials and structures under different loading conditions. It also transpires that the new model is advantageous over the existing models.

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Section: Appendix Amentioning

confidence: 89%

“…In which DIF x can be estimated by the following expression which is a slightly modified version of that given in references [40][41][42][43][44][45][46]…”

Section: Appendix Amentioning

confidence: 99%

A new Dynamic Plasticity and Failure Model for Metals

Lin

Wen

2019

Metals

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“…Through the experimental measurements, Zhao et al. (Zhao and Wen, 2018) presented an empirical equation of the quasi-static strength of wet concrete, and the relationship between the strength of wet concrete and its saturation can be expressed as follows: where fc, ft are quasi-static compressive and tensile strength of dry concrete. fcw, ftw are quasi-static strength of wet concrete.…”

Section: Modified Ih-pd Model For Wet Concretementioning

confidence: 99%

“…To depict the influence of saturation on the dynamic behavior of wet concrete, Zhao et al. (Zhao and Wen, 2018) presented an empirical formula to define the ratio of the wet concrete dynamic increase factor to that of dry concrete: where A is a material parameter, and it satisfies: where the value C is 0.15.…”

Section: Modified Ih-pd Model For Wet Concretementioning

confidence: 99%

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

Huang

et al. 2022

International Journal of Damage Mechanics

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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.

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“…However, the effect of free water on the mechanical behavior of concrete under high stress level is still an investigate topic, essentially due to a lack of experimental data. In particular, numerical investigations recently investigated the influence of free water content using advanced constitutive models for concrete, in case of thick concrete targets under ogival-nosed projectile impact [20,21]. These works emphasize that the water-saturation ratio is shown to be a major parameter that needs to be taken into account for predicting the ballistic performance of concrete targets.…”

Section: Introductionmentioning

confidence: 99%

Prediction of perforation into concrete accounting for saturation ratio influence at high confinement

Baroth

Briffaut

et al. 2021

International Journal of Impact Engineering

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This paper provides both an analytical and a finite element model aiming at better predicting possible perforation of reinforced concrete slabs submitted to impacts. Both models account for free water saturation ratio and high triaxial stress induced into concrete by the impact. Finite element simulations are performed with Abaqus explicit code using a revised constitutive model for concrete; this coupled damage plasticity model (PRM) accounts for strain rate effects and the influence of saturation ratio on the triaxial behavior. Complementary original analytical predictions of ballistic limit and residual velocities are provided for both hard and soft impacts. These predictions depend on a recent deviatoric stress-based formulation of compressive strength of concrete. Numerical and analytical results are consistent with bending and punching experimental tests.

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Effect of free water content on the penetration of concrete

Cited by 23 publications

References 20 publications

A new Dynamic Plasticity and Failure Model for Metals

A new Dynamic Plasticity and Failure Model for Metals

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

Prediction of perforation into concrete accounting for saturation ratio influence at high confinement

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