Mesoscale modelling of size effect on the evolution of fracture process zone in concrete

Zhou, Rujun; Lu, Yong; Wang, Li Ge; Chen, Han-Mei

doi:10.1016/j.engfracmech.2021.107559

Cited by 34 publications

(10 citation statements)

References 42 publications

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“…Additionally, low interfacial fracture properties led to more pronounced pre-peak nonlinearity. Interface debonding in the area around the main crack can be compared to the formation of FPZs that induce quasibrittleness in heterogeneous materials [100]. The choice of fracture parameters for ITZs conditions the size of simulated FPZs and, consequently, the quasibrittleness of the sample.…”

Section: Influence Of Interface Stiffness On Crack Pathmentioning

confidence: 99%

Identification of microscale fracture models for mortar with in-situ tests

Tsitova

Bernachy‐Barbe

Bary

et al. 2023

International Journal of Mechanical Sciences

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Section: Influence Of Interface Stiffness On Crack Pathmentioning

confidence: 99%

Identification of microscale fracture models for mortar with in-situ tests

Tsitova

Bernachy‐Barbe

Bary

et al. 2023

International Journal of Mechanical Sciences

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“…Here we name the growth of crack in length 'propagating' and in width 'opening' for convenience. In the three-point bending experiment, the propagating and opening of a crack are synchronized [17][18]. In other words, when the crack propagating begins, the opening begins, and when crack propagating ceases, the opening ceases too.…”

Section: Evolution Of Crack Openingmentioning

confidence: 99%

Application of improved surface fitting algorithm in digital image correlation method on concrete blasting process

Cui

Wang

Yue

et al. 2023

International Conference on Precision Instruments and Optical Engineering (PIOE 2022)

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To further investigate the failure process of concrete in demolition blasting, the concrete blasting experiments were conducted. The digital image correlation (DIC) method was used to measure the full field surface deformation. In the DIC method, the surface fitting sub-pixel displacement algorithm has simple structure and high computational efficiency, however, the accuracy is poor. A new surface fitting algorithm based on moving least square method with a Gaussian basis function and a 3×3 fitting window was used and the accuracy was improved to 1/200 pixel. The blasting experiment results show that the failure of concrete is driven by blasting stress wave and gas. The action time is about 4.5 ms. The formation of crack is dominated by stress wave. The maximum velocity of crack propagation is 225.95 m/s, the average velocity is 122.27 m/s, and the time is about 1.75 ms. The gas mainly makes the crack to expand, and then divides the concrete. Under explosion loading, the concrete also shows a fracture process zone, and a strain concentration is formed at the crack tip. The length of the fracture process zone is 8~9 times of the maximum aggregate size.

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“…Previous studies [31,43,45] reveal that a simple bilinear cohesive constitutive material model is capable of describing the failure behaviour of concrete under mode-I, mode-II, as well as mixed mode fracture behaviour by combining normal and shear traction components together. The detailed information about the constitutive description of this model can be found in [46,47] and Figure 3 shows its sketch.…”

Section: Materials Modelsmentioning

confidence: 99%

“…Over the last decades, there have been questions about the necessity of a rate-dependent constitutive model for concrete in dynamic tension [22,40,44,45]. To clarify this issue, a rate-independent model is used in this section to modelling the dynamic response in a spalling test for comparison.…”

Section: Effect Of Rate-dependent Materials Responsementioning

confidence: 99%