Tensile behavior of concrete under high loading rates

Ožbolt, Joško; Sharma, Akanshu; Irhan, Baris; Sola, Emiliano

doi:10.1016/j.ijimpeng.2014.02.005

Cited by 82 publications

(45 citation statements)

References 39 publications

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“…The model parameters are calibrated based on the uniaxial compressive tests performed by [3], where the rate of applied loading was kept within the range so that inertia does not play a major role (less than 1/s). The model was verified against experimental results for compressive and tensile behavior under different strain rates [9,15,16]. For example, in the case of compact tension specimen [16] it was confirmed that the progressive increase of resistance is due to the inertia generated at the tip of the macro crack, which causes crack branching and leads to progressive increase of resistance.…”

Section: Introductionmentioning

confidence: 70%

“…In order to investigate the behaviour of concrete under high loading rates and verify the computational procedures developed, different problems were studied in the past, e.g. Compact Tension Specimen, Split Hopkinson Bar and Hammer Drop Tests [12], [15][16][17]. The comparisons between experimental and numerical results have shown that the code is able to correctly predict the phenomena related to high loading rate such as rate dependent resistance, crack branching, crack velocity and rate dependent failure mode.…”

Section: Introductionmentioning

confidence: 99%

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3D finite element simulations of high velocity projectile impact

Ožbolt

Irhan

Ruta

2015

EPJ Web of Conferences

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Abstract. An explicit three-dimensional (3D) finite element (FE) code is developed for the simulation of high velocity impact and fragmentation events. The rate sensitive microplane material model, which accounts for large deformations and rate effects, is used as a constitutive law. In the code large deformation frictional contact is treated by forward incremental Lagrange multiplier method. To handle highly distorted and damaged elements the approach based on the element deletion is employed. The code is then used in 3D FE simulations of high velocity projectile impact. The results of the numerical simulations are evaluated and compared with experimental results. It is shown that it realistically predicts failure mode and exit velocities for different geometries of plain concrete slab. Moreover, the importance of some relevant parameters, such as contact friction, rate sensitivity, bulk viscosity and deletion criteria are addressed.

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Section: Introductionmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

3D finite element simulations of high velocity projectile impact

Ožbolt

Irhan

Ruta

2015

EPJ Web of Conferences

Self Cite

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“…When a specimen is quickly loaded, no rate sensitivity can be observed in linear elastic range of material whereas there is a considerable effect of loading rate on structural response in case of material exhibiting damage and fracture phenomena such as concrete [38]. As a result, this is inferred that rate sensitivity might be closely connected with damage and softening of the material, i.e.…”

Section: Constitutive Equations For the Rate Dependent Multi-laminatementioning

confidence: 99%

“…As a result, this is inferred that rate sensitivity might be closely connected with damage and softening of the material, i.e. the more damage, the stronger will be the effect of loading rate on structural response [38]. Although thus far, there is no consensus on the mechanism of strain rate sensitivity of concrete, in view of 4 main acceptable reasons -the lateral inertia forces of microcracking which cause an increase in the critical strain, the micro-cracks propagation through aggregate particles rather than distribution of macro-cracks around those, formation of more cracks and fragments and the viscosity of free water in pores of concrete-the structural concrete resistance increases once the strain rate increases [18,[39][40][41][42] and these result in a retardation of crack propagation or retarded damage.…”

Section: Constitutive Equations For the Rate Dependent Multi-laminatementioning

confidence: 99%

Multi-Laminate Rate-Dependent Modelling of Static and Dynamic Concrete Behavior through Damage Formulation

Sadrnejad

Hoseinzadeh

2017

Scientia Iranica

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Mathematical simulation of the nonlinear tri-dimensional mechanical behavior of quasi-brittle materials like concrete is one of the biggest challenges in the engineering science. It is vital to have the knowledge of the response of concrete specimens subjected to low and high strain rate deformation for the analysis of concrete structures under the static and dynamic loading cases. The behavior of this material is generally known to be strain rate sensitive. Among phenomena of different orientation, the multi plane models, like multi-laminate models using a constitutive equation in a vectorial form rather than tensorial form by means of capturing interactions, can meet this goal adequately. This paper suggests a robust rate dependent damage based model in the multi-planes framework accomplished with minimum parameters for calibration and appropriate for engineering purposes. This damage formulation has been built on the basis of two types of essential damage, axial damage and shear damage, that basically can happen on each sampling plane and based on this concept two new axial and shear damage functions are proposed. Model verification has been studied under different compressive and tensile loading rates, comparing the results of the proposed model with the experimental data and Mohr-Coulomb failure criterion envelope line.

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“…However, the dynamic tensile experiments of concrete are harder to perform than the dynamic compressive tests due to the specific preparation of specimen and equipment requirements. As a result, the studies on dynamic tensile behaviours are much less than those on dynamic compressive properties of the concrete materials …”

Section: Introductionmentioning

confidence: 99%

Dynamic splitting tensile properties of concrete and cement mortar

Liu

Zhou

et al. 2019

Fatigue Fract Eng Mat Struct

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To investigate the dynamic tensile behaviours of concrete and cement mortar, a 50‐mm split Hopkinson pressure bar was applied on Brazilian disc specimens for dynamic tensile experiments, in which strain rate varied from 10−5 to 20 s−1. The high‐speed camera testing technique was used to capture the dynamic fractured process of the specimens at relative high strain rate. The experimental results revealed that the dynamic tensile strength of concrete specimens has a stronger strain rate effect than that of cement mortar specimens. Then three typical failure patterns of the specimens were confirmed in dynamic experiments. In addition, one‐parameter semi‐empirical relation between dynamic tensile strength and strain rate was established. Finally, the limitation of dynamic splitting experiments on Brazilian disc specimens was discussed in detail at high strain rate, in which the crack initiates from the contact point between the incident bar and specimens rather than the centre of the specimens.

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Tensile behavior of concrete under high loading rates

Cited by 82 publications

References 39 publications

3D finite element simulations of high velocity projectile impact

3D finite element simulations of high velocity projectile impact

Multi-Laminate Rate-Dependent Modelling of Static and Dynamic Concrete Behavior through Damage Formulation

Dynamic splitting tensile properties of concrete and cement mortar

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