Evaluation of Stress–Strain Behavior of Self-Compacting Rubber Lightweight Aggregate Concrete under Uniaxial Compression Loading

Lv, Jing; Zhou, Tianhua; Du, Qiang; Li, Kunlun; Sun, Kai

doi:10.3390/ma12244064

Cited by 9 publications

(6 citation statements)

References 38 publications

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“…Within the framework of this work, it is appropriate to note that since the porous bone material contains mineralized components [6,18], and therefore shows the properties of a brittle or quasi-brittle material, some other porous mineral materials exhibit similar loaddisplacement patterns in compression tests. For example, the load-displacement curves for uniaxial concrete compression [27,28] are similar to the patterns in Figure 1. This means that the models of damage and destruction of concrete and other brittle materials [29] can be adapted to analyze the evolution of bone tissue damage.…”

Section: Bone As a Biomechanical System Of Interacting Structural Unitssupporting

confidence: 58%

A Damage Model to Trabecular Bone and Similar Materials: Residual Resource, Effective Elasticity Modulus, and Effective Stress under Uniaxial Compression

Kolesnikov

Meltser

2021

Symmetry

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Experimental research of bone strength remains costly and limited for ethical and technical reasons. Therefore, to predict the mechanical state of bone tissue, as well as similar materials, it is desirable to use computer technology and mathematical modeling. Yet, bone tissue as a bio-mechanical object with a hierarchical structure is difficult to analyze for strength and rigidity; therefore, empirical models are often used, the disadvantage of which is their limited application scope. The use of new analytical solutions overcomes the limitations of empirical models and significantly improves the way engineering problems are solved. Aim of the paper: the development of analytical solutions for computer models of the mechanical state of bone and similar materials. Object of research: a model of trabecular bone tissue as a quasi-brittle material under uniaxial compression (or tension). The new ideas of the fracture mechanics, as well as the methods of mathematical modeling and the biomechanics of bone tissues were used in the work. Compression and tension are considered as asymmetric mechanical states of the material. Results: a new nonlinear function that simulates both tension and compression is justified, analytical solutions for determining the effective and apparent elastic modulus are developed, the residual resource function and the damage function are justified, and the dependences of the initial and effective stresses on strain are obtained. Using the energy criterion, it is proven that the effective stress continuously increases both before and after the extremum point on the load-displacement plot. It is noted that the destruction of bone material is more likely at the inflection point of the load-displacement curve. The model adequacy is explained by the use of the energy criterion of material degradation. The results are consistent with the experimental data available in the literature.

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Section: Bone As a Biomechanical System Of Interacting Structural Unitssupporting

confidence: 58%

A Damage Model to Trabecular Bone and Similar Materials: Residual Resource, Effective Elasticity Modulus, and Effective Stress under Uniaxial Compression

Kolesnikov

Meltser

2021

Symmetry

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“…e main macrocrack gradually forms with the expansion of cracks, then eventually leading to concrete failure. Damage theory can be used to describe the nonlinear behavior of a progressive microcracking process of concrete [39,40]. e complex discrete failure process of concrete can be described by damage evolution parameter (D) in continuum damage mechanics.…”

Section: Damage Eory Of Continuummentioning

confidence: 99%

Stress‐Strain Relationship of Steel Fiber Reinforced Alkali Activated Slag Concrete under Static Compression

Yuan

Guan

Shi

2021

Advances in Civil Engineering

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Stress-strain curve can accurately reflect the mechanical behavior of materials, and it is very important for structural design and nonlinear numerical analysis. Some cube and prism specimens were made to investigate the physical and mechanical properties of steel fiber reinforced alkali activated slag concrete (AASC); test results show that the strength, Young’s Elastic Modulus, and Poisson’s ratio all increase with the increase of steel fiber content. The steel fiber reinforced AASC shows an excellent postcracking behavior. Damage evolution parameter (D) was used to describe the formation and propagation of cracks, and continuum damage evolution model of steel fiber reinforced AASC was established by Weibull and Cauchy distribution. The establishing model can well describe the geometric characteristics of the key points of the concrete materials stress-strain curve. Finally, the accuracy of the model was verified by comparing the test stress-strain relationship curve of steel fiber reinforced AASC.

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“…Figure 9f compares the axial stress and axial strain curves of all RFAC specimens. For other kinds of recycled concrete, e.g., shale ceramsite lightweight aggregate concrete [33], recycled brick aggregate concrete and recycled rubber concrete [34,35], similar trends that the extent of post-peak softening was improved as the replacement ratio increased. However, the research results of RAC from the demolition of concrete structures resulted in opposite conclusions.…”

Section: Stress-strain Curvesmentioning

confidence: 98%

Recycled GFRP Aggregate Concrete Considering Aggregate Grading: Compressive Behavior and Stress–Strain Modeling

Zhou

Weng

et al. 2022

Polymers

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Fiber-reinforced polymer (FRP) composites have been used in various industries, thus a large amount of FRP wastes have been generated due to the out-of-service of FRP products. Recycling FRP wastes into coarse aggregates to replace natural coarse aggregates (NCA) to form the recycled FRP aggregate concrete (RFAC) is a potential approach to dispose of huge quantities of FRP wastes with low environmental impact. In this paper, waste glass FRP (GFRP) bars were cut into particles of 12 sizes to enable the grading of recycled FRP aggregate (RFA) as similar as possible to that of NAC. The influence of different RFA volume replacement ratios (0%, 30%, 50%, 70%, 100%) on the compressive performance of RFAC was investigated based on uniaxial compression tests of 15 standard cylinders. The results showed that the failure mode of RFAC was different from that of NAC. As the RFA replacement ratio increased, the compressive strength and elastic modulus of the RFAC gradually decreased, but its post-peak brittleness was significantly mitigated compared to NAC. The Poisson’s ratio of RFAC increased with the increase in the RGFA replacement ratio at the elastic stage and was smaller than that of NCA concrete. Both the existing stress–strain models developed for NAC and recycled aggregate concrete (RAC) were found not fit for the RFAC. Thus, a new stress–strain model that was applicable to RFAC was developed by modifying the classical existing model, and a good agreement between the model predictions and test data was reached.

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Evaluation of Stress–Strain Behavior of Self-Compacting Rubber Lightweight Aggregate Concrete under Uniaxial Compression Loading

Cited by 9 publications

References 38 publications

A Damage Model to Trabecular Bone and Similar Materials: Residual Resource, Effective Elasticity Modulus, and Effective Stress under Uniaxial Compression

A Damage Model to Trabecular Bone and Similar Materials: Residual Resource, Effective Elasticity Modulus, and Effective Stress under Uniaxial Compression

Stress‐Strain Relationship of Steel Fiber Reinforced Alkali Activated Slag Concrete under Static Compression

Recycled GFRP Aggregate Concrete Considering Aggregate Grading: Compressive Behavior and Stress–Strain Modeling

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