scholarly journals Stochastic Constitutive Relationship of Self-Compacting Concrete under Uniaxial Compression

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Xiao Li ◽  
Zhi Shan ◽  
Zhiwu Yu ◽  
Jing Gao ◽  
Jianfeng Mao
Keyword(s):  
Uniaxial Compression ◽  
Practical Method ◽  
Constitutive Relationship ◽  
Experimental Investigations ◽  
Chain Model ◽  
Self Compacting Concrete ◽  
Mechanical Responses ◽  
Cyclic Compression ◽  
Proposed Model ◽  
Relationship Of

Experimental investigations on self-compacting concrete (SCC) under uniaxial monotonic and cyclic compression taking into account the stochastic constitutive relationship were reported and conducted. By introducing a practical method on plasticity characterization into the fiber bundle-plastic chain model, a new constitutive model based on the statistic damage approach for describing the stochastic mechanical responses of SCC under uniaxial compression was proposed. The comparison between the experimental results and the predictions demonstrated that the proposed model was able to characterize the salient features for SCC under both uniaxial monotonic and cyclic compression. Furthermore, the stochastic evolution (SE) of SCC under uniaxial compression and a comparison between the SCC and normally vibrated concrete (NVC) in certain aspects were analyzed and discussed; it was concluded that the stochastic constitutive relationship of SCC under compression can be understood by a media process of transition from microscale to macroscale.

scholarly journals Study on constitutive relationship of acicular wollastonite polypropylene hybrid fiber concrete under uniaxial compression

2021 ◽  
Vol 2085 (1) ◽  
pp. 012037
Author(s):  
Xu Yan ◽  
Hao Liu ◽  
Yang Liu ◽  
Jin Xie
Keyword(s):  
Uniaxial Compression ◽  
Test Data ◽  
Constitutive Relationship ◽  
Hybrid Fiber ◽  
Steel Tubes ◽  
The Press ◽  
Fiber Concrete ◽  
Relationship Of

Abstract In order to study the influence of fiber parameters on the performance of ordinary hybrid fiber concrete, the corresponding constitutive relationship of hybrid fiber concrete is proposed. The test data are obtained by adding steel tubes to increase the stiffness of the press, and the constitutive relationship of C40 hybrid fiber concrete is proposed. The constitutive relationship is polynomial in the rising section and rational in the falling section.

Constitutive relationship of IN690 superalloy by using uniaxial compression tests

Rare Metals ◽  
2011 ◽  
Vol 30 (1) ◽  
pp. 81-86 ◽  
Author(s):  
Chaoyang Sun ◽  
Jinrong Liu ◽  
Rui Li ◽  
Qingdong Zhang ◽  
Jianxin Dong
Keyword(s):  
Uniaxial Compression ◽  
Constitutive Relationship ◽  
Compression Tests ◽  
Relationship Of

The Constitutive Relationship of High Strength Concrete under Uniaxial Compression

2013 ◽  
Vol 838-841 ◽  
pp. 3-6 ◽  
Author(s):  
Jin Cai Zhu ◽  
Chang Wang Yan ◽  
Shu Guang Liu
Keyword(s):  
Uniaxial Compression ◽  
High Strength Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
Constitutive Relations ◽  
High Strength ◽  
Constitutive Relationship ◽  
Strength Concrete ◽  
Relationship Of ◽  
Theoretical Results

Study of Constitutive relations of concrete based on Chinese and foreign scholars. This paper put forward constitutive equation that more close to the stress-strain data of high strength concrete under uniaxial compression, and make a comparison between the theoretical results and experimental data, and promising results were obtained. It can be used as a basis for researching of high strength and high performance concrete of other mechanical properties.

scholarly journals Predicition Of Compressive Strength In Light-Weight Self-Compacting Concrete By ANFIS Analytical Model

2015 ◽  
Vol 61 (2) ◽  
pp. 53-72 ◽  
Author(s):  
B. Vakhshouri ◽  
S. Nejadi
Keyword(s):  
Compressive Strength ◽  
Construction Projects ◽  
Elasticity Modulus ◽  
Linear Regression Analysis ◽  
Experimental Investigations ◽  
Light Weight ◽  
Structural Elements ◽  
Self Compacting Concrete ◽  
Proposed Model ◽  
The Relationship

AbstractLight-weight Self-Compacting Concrete (LWSCC) might be the answer to the increasing construction requirements of slenderer and more heavily reinforced structural elements. However there are limited studies to prove its ability in real construction projects. In conjunction with the traditional methods, artificial intelligent based modeling methods have been applied to simulate the non-linear and complex behavior of concrete in the recent years. Twenty one laboratory experimental investigations on the mechanical properties of LWSCC; published in recent 12 years have been analyzed in this study. The collected information is used to investigate the relationship between compressive strength, elasticity modulus and splitting tensile strength in LWSCC. Analytically proposed model in ANFIS is verified by multi factor linear regression analysis. Comparing the estimated results, ANFIS analysis gives more compatible results and is preferred to estimate the properties of LWSCC.

Constitutive Relationship of TRIP780 Steel in Quenching Process

2012 ◽  
Vol 572 ◽  
pp. 261-266
Author(s):  
Qiang Cao ◽  
Qing Dong Zhang ◽  
Chao Yang Sun
Keyword(s):  
Flow Stress ◽  
Tensile Tests ◽  
Constitutive Relationship ◽  
Uniaxial Tensile ◽  
Proposed Model ◽  
Quenching Process ◽  
Gleeble 3500 ◽  
Increasing Temperature ◽  
Relationship Of ◽  
The Impact

To characterize the mechanical behavior of TRIP780 steel in quenching process, Uniaxial tensile tests are performed on Gleeble-3500 thermo-simulation machine at temperature 323K~1073K and corresponding stress-strain curves are obtained. The results show that flow stress is affected by deformation temperature significantly and declines with increasing temperature. Based on simplified and modified Zerrilli-Armstrong model, the impact factor of temperature with quadratic polynomial fitting is introduced and the constitutive relationships with temperature dependent are established. The accuracy of the constitutive equations is verified and the flow stress predicted by the proposed model is consistent with experimental results. Therefore, the constitutive model can be applied for numerical simulation of quenching process.

Micromechanical Damage Constitutive Model of Leached Concrete

2014 ◽  
Vol 629-630 ◽  
pp. 572-578 ◽  
Author(s):  
Chun Xiang Qian ◽  
Bei Huang ◽  
Zhi Hai He
Keyword(s):  
Constitutive Model ◽  
Ph Value ◽  
Experimental Investigations ◽  
Mechanical Degradation ◽  
Peak Strain ◽  
Calcium Leaching ◽  
Proposed Model ◽  
Micromechanical Damage ◽  
Damage Constitutive Model ◽  
Relationship Of

This paper deal with concrete behavior under chemical and mechanical degradation. Experimental investigations were described where the effects of the calcium leaching process of concrete on its mechanical properties were highlight. The compressive strength and the stress-strain relationship of leached concrete with different leaching degradations were investigated experimental. As leaching grew, a loss of stiffness and of strength were observed and an obviously decrease of peak strain was noted. Then the micromechanical damage constitutive model of the leached concrete was proposed. The proposed model was applied to simulate typical laboratory tests. And it was shown that the proposed model was able to describe the main features of mechanical behavior of concrete in sound and leaching degraded states. And the parameters in the proposed model can be got by testing the pH value of pore solution, which it is easier to measure from the existing concrete.

The Constitutive Model for High Temperature Flow Behavior of SiC/6168Al Composite

2015 ◽  
Vol 1089 ◽  
pp. 37-41
Author(s):  
Jiang Wang ◽  
Sheng Li Guo ◽  
Sheng Pu Liu ◽  
Cheng Liu ◽  
Qi Fei Zheng
Keyword(s):  
Constitutive Model ◽  
Hot Deformation ◽  
Flow Behavior ◽  
Type Equation ◽  
Strain Rate Range ◽  
Compression Tests ◽  
Stress Strain ◽  
Hollomon Parameter ◽  
Proposed Model ◽  
Relationship Of

The hot deformation behavior of SiC/6168Al composite was studied by means of hot compression tests in the temperature range of 300-450 °C and strain rate range of 0.01-10 s-1. The constitutive model was developed to predict the stress-strain curves of this composite during hot deformation. This model was established by considering the effect of the strain on material constants calculated by using the Zenter-Hollomon parameter in the hyperbolic Arrhenius-type equation. It was found that the relationship of n, α, Q, lnA and ε could be expressed by a five-order polynomial. The stress-strain curves obtained by this model showed a good agreement with experimental results. The proposed model can accurately describe the hot flow behavior of SiC/6168Al composite, and can be used to numerically analyze the hot forming processes.

scholarly journals Optimization of Consignment-Store-Based Supply Chain with Black Hole Algorithm

Complexity ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Ágota Bányai ◽  
Tamás Bányai ◽  
Béla Illés
Keyword(s):  
Black Hole ◽  
Supply Chain ◽  
Optimization Problems ◽  
Optimization Method ◽  
Chain Model ◽  
Supply Chain Optimization ◽  
Proposed Model ◽  
Supply Chain Model ◽  
Supply Model ◽  
Black Hole Algorithm

The globalization of economy and market led to increased networking in the field of manufacturing and services. These manufacturing and service processes including supply chain became more and more complex. The supply chain includes in many cases consignment stores. The design and operation of these complex supply chain processes can be described as NP-hard optimization problems. These problems can be solved using sophisticated models and methods based on metaheuristic algorithms. This research proposes an integrated supply model based on consignment stores. After a careful literature review, this paper introduces a mathematical model to formulate the problem of consignment-store-based supply chain optimization. The integrated model includes facility location and assignment problems to be solved. Next, an enhanced black hole algorithm dealing with multiobjective supply chain model is presented. The sensitivity analysis of the heuristic black hole optimization method is also described to check the efficiency of new operators to increase the convergence of the algorithm. Numerical results with different datasets demonstrate how the proposed model supports the efficiency, flexibility, and reliability of the consignment-store-based supply chain.

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