A constitutive model for concrete subjected to extreme dynamic loadings

Bai, Zhun; Liu, Yuanxue; Yang, Juntang; He, S.

doi:10.1016/j.ijimpeng.2019.103483

Cited by 14 publications

(2 citation statements)

References 50 publications

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“…that the strain rate is constant (Bai et al, 2020). Here, the strain rate, an environmental variable, is considered a factor influencing material parameters rather than a constitutive variable.…”

Section: Introductionmentioning

confidence: 99%

A Dynamic Elastoplastic Model of Concrete Based on a Modeling Method with Environmental Factors as Constitutive Variables

Lu,

Meng,

Zhou

et al. 2023

J. Eng. Mech.

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This paper develops a modeling method with incremental stress-strain-environment constitutive model to predict the change in the plastic mechanical behavior of concrete caused by environmental action, and it regards the environmental factor as a constitutive variable, similar to stress and strain. The yield condition of the model is a function of stress, the plastic internal variable, and the environmental variable. The loading-unloading criterion is established in the space constructed by the strain and the environmental variable to determine the contribution of mechanical loads and environmental factors to plastic deformation. By considering the strain rate as an environmental factor and applying the proposed method, a stress-strain-strain rate constitutive model of concrete is developed to describe the plastic flow caused by the combined action of stress and strain rate. In addition, constant-and variable-strain rate loading tests are performed to evaluate the performance of the established model. In particular, the model's capabilities are further highlighted by comparing the simulation results of the dynamic stress-strain model and the proposed model under loading conditions with rapidly decreasing strain rates.

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Section: Introductionmentioning

confidence: 99%

A Dynamic Elastoplastic Model of Concrete Based on a Modeling Method with Environmental Factors as Constitutive Variables

Lu,

Meng,

Zhou

et al. 2023

J. Eng. Mech.

View full text Add to dashboard Cite

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“…It was recognized that the effective hardness index and Young's modulus had the highest influence on DOP. Bai et al 18 proposed a constitutive model for concrete under dynamic loadings using finite element code LS-DYNA implementing the erosion algorithm. Zhang et al 19 conducted a parametric study on the penetration resistance of concrete targets using LS-DYNA software.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation on the resistance of steel fiber-reinforced heavyweight concrete slabs against rigid projectile impact

Hosseinipour

Amiri

Naghipour

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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This study presents an inclusive experimental and numerical investigation of the resistance of steel fiber-reinforced heavyweight concrete under the impact of a high-velocity rigid projectile. Thus, concrete specimens were made using hooked-end steel fibers at 0%, 0.5%, 1%, 1.5%, 2%, and 2.5% volume fractions to assess the physicomechanical specifications of heavyweight concrete containing iron ore as fine and coarse aggregates. Also, the compressive and splitting tensile strengths, modulus of elasticity, stress–strain relationship, bulk density, and water absorption capacity of heavyweight concrete specimens were compared to those of the equivalent normal-weight concrete. The penetration tests were conducted on concrete slabs fabricated with normal weight and heavyweight concrete mixes to examine the specimens’ failure mode, penetration depth, and spalling volume. The results revealed that normal-weight concrete's compressive and splitting tensile strengths were more susceptible to adding steel fibers. It was also shown that increasing the density and fiber content significantly affected the impact resistance and residual velocity of fiber-reinforced concrete elements. Heavyweight concrete provided better life safety measures against the impact load than normal weight specimens, while the repair and reuse of heavyweight concrete components were feasible. Moreover, numerical modeling was performed using LS-DYNA finite element software, and the predictions were compared to the proposed experimental results and the analytical relations in the literature. There was good agreement between the results.

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A modified Lemke Algorithm for dynamic rigid plastic response of skeletal structures

Khan

Ahmad

Khan

et al. 2021

Computers & Structures

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A constitutive model for concrete subjected to extreme dynamic loadings

Cited by 14 publications

References 50 publications

A Dynamic Elastoplastic Model of Concrete Based on a Modeling Method with Environmental Factors as Constitutive Variables

A Dynamic Elastoplastic Model of Concrete Based on a Modeling Method with Environmental Factors as Constitutive Variables

Experimental and numerical investigation on the resistance of steel fiber-reinforced heavyweight concrete slabs against rigid projectile impact

A modified Lemke Algorithm for dynamic rigid plastic response of skeletal structures

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