scholarly journals Study on Mechanical Properties and Constitutive Relationship of Recycled Large Aggregate Concrete

2019 ◽  
Vol 371 ◽  
pp. 042017
Author(s):  
Lin Li ◽  
Jianguo Chen ◽  
Maixi Zhou ◽  
Guangjun Wu ◽  
Zhuojie Huang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Constitutive Relationship ◽  
Large Aggregate ◽  
Aggregate Concrete ◽  
Relationship Of

scholarly journals Failure Criteria and Constitutive Relationship of Lightweight Aggregate Concrete under Triaxial Compression

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 507
Author(s):  
Peihuan Ye ◽  
Yuliang Chen ◽  
Zongping Chen ◽  
Jinjun Xu ◽  
Huiqin Wu
Keyword(s):  
Triaxial Compression ◽  
Lightweight Aggregate ◽  
Confining Pressure ◽  
Failure Criteria ◽  
Constitutive Relationship ◽  
Lightweight Aggregate Concrete ◽  
Stress Strain ◽  
Aggregate Concrete ◽  
Stress Theory ◽  
Relationship Of

This paper investigates the compression behavior and failure criteria of lightweight aggregate concrete (LAC) under triaxial loading. A total of 156 specimens were tested for three parameters: concrete strength, lateral confining pressure and aggregate immersion time, and their effects on the failure mode of LAC and the triaxial stress-strain relationship of LAC is studied. The research indicated that, as the lateral constraint of the specimen increases, the failure patterns change from vertical splitting failure to oblique shearing failure and then to indistinct traces of damage. The stress-strain curve of LAC specimens has an obvious stress plateau, and the curve no longer appears downward when the confining pressure exceeds 12 MPa. According to the experimental phenomenon and test data, the failure criterion was examined on the Mohr–Coulomb theory, octahedral shear stress theory and Rendulic plane stress theory, which well reflects the behavior of LAC under triaxial compression. For the convenience of analysis and application, the stress-strain constitutive models of LAC under triaxial compression are recommended, and these models correlate well with the test results.

Experimental Research on the Stress - Strain Curve of Regional Confined Concrete under Single Axial Press

2014 ◽  
Vol 584-586 ◽  
pp. 1289-1292
Author(s):  
Guo Liang Zhu
Keyword(s):  
Mechanical Properties ◽  
Theoretical Analysis ◽  
Constitutive Model ◽  
Theoretical Basis ◽  
Strain Curve ◽  
Confined Concrete ◽  
Constitutive Relationship ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Relationship Of

Regional confined concrete is base on confined concrete. It is the theory and application of a new attempt and development on confined concrete. To apply it to the actual project, we need to research mechanical properties and establish constitutive relationship of regional confined concrete. According to the research, we had carried on a series of tests, founded the stress-strain constitutive model of regional confined concrete under single axial press. The accuracy of theoretical analysis were more fully verified , and a theoretical basis for the application was provided.

Multi-Scale Analysis of Thermo-Mechanical Properties of 2.5D Angle-Interlock Woven Shape Memory Polymer Composites

2018 ◽  
Vol 35 (4) ◽  
pp. 475-486
Author(s):  
H. Y. Sun ◽  
J. P. Gu ◽  
Y. Tang ◽  
Z. M. Xie
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Polymer Composites ◽  
Shape Memory Polymer ◽  
Small Strain ◽  
Constitutive Relationship ◽  
Nonlinear Fitting ◽  
Multi Scale ◽  
Hereditary Integral ◽  
Relationship Of

ABSTRACTA multi-scale strategy is employed in the paper to investigate the thermo-mechanical properties of 2.5D angle-interlock woven shape memory polymer composites (SMPCs). In the study, the mesoscopic model of 2.5D woven SMPCs and microscopic model of yarns are firstly developed. After that, the themo-viscoelastic constitutive relationship of the yarn is described in the form of hereditary integral and the parameters of relaxation moduli are obtained from nonlinear fitting of Prony series based on the results of finite element method (FEM). Based on the multi-scale models and the constitutive relationship, the effects of warp and weft arranged densities on viscoelastic properties of 2.5D woven SMPCs are studied in detail. Finally, the shape memory behavior along the warp direction in small strain region is also analyzed. The research in the paper lays a foundation for design and application of woven SMPCs in engineering.

Experimental Study on Dynamic Mechanical Properties of Galvanized Iron Wire under Seismic Strain Rate

2014 ◽  
Vol 580-583 ◽  
pp. 1435-1438
Author(s):  
Hao Zhang ◽  
Jia He Zhang ◽  
De Bin Wang ◽  
Xu Li
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Dynamic Mechanical Properties ◽  
Constitutive Relationship ◽  
Iron Wire ◽  
Seismic Strain Rate ◽  
Seismic Strain ◽  
Hydraulic Servo ◽  
Dynamic Tensile Test ◽  
Relationship Of

This paper focuses on the mechanical properties of galvanized iron wire under various conditions of earthquake-type strain rate. The dynamic tensile test of galvanized iron wire was conducted on MTS New 810 electro-hydraulic servo-controlled testing system. The dynamic tensile constitutive relationship of galvanized iron wire was proposed under seismic strain rate. The accuracy of the proposed constitutive relationship of galvanized iron wire was verified by comparing with reinforcing steel.

scholarly journals Investigation of the Constitutive Model of W/PMMA Composite Microcellular Foams

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1136 ◽  
Author(s):  
Yuxuan Zhu ◽  
Guoqiang Luo ◽  
Ruizhi Zhang ◽  
Qiwen Liu ◽  
Yi Sun ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Constitutive Model ◽  
Constitutive Relationship ◽  
Microcellular Foam ◽  
Melt Mixing ◽  
Static Compression ◽  
Microcellular Foams ◽  
Static Mechanical ◽  
Relationship Of ◽  
Quasi Static Compression

Investigating the constitutive relationship of a material can provide better understanding of the mechanical properties of a material and has an irreplaceable effect on optimizing the performance of a material. This paper investigated a constitutive model for tungsten/polymethyl-methacrylate (W/PMMA) composite microcellular foams prepared by using melt mixing and supercritical carbon dioxide foaming. The stress-strain relationships of these foams with different W contents were measured under static compression. The elastic modulus and compressive strength values of the foams were remarkably greater than those of the pure PMMA foams: at a W content of 20 wt %, these values were increased by 269.1% and 123.9%, respectively. Based on the Maxwell constitutive model, the relevant coefficients were fitted according to the experimental data of different relative densities and W contents in quasi-static compression. According to the numerical relationships between the relevant coefficients and the relative densities and W contents, the quasi-static mechanical constitutive model of W/PMMA composite microcellular foams with W contents of 0~60 wt % and relative densities of 0.15~0.55 were predicted. This study provided basic data for the optimal design of the W/PMMA composite microcellular foams and proposed a method for investigating the mechanical properties of composite microcellular foam materials.

Simulation Investigation the Effect of Heating-Lines on Tensile Mechanical Properties of Sheet Metal after Laser Scanning

2011 ◽  
Vol 314-316 ◽  
pp. 331-336 ◽  
Author(s):  
Wen Jiao Dan ◽  
Wei Gang Zhang
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Sheet Metal ◽  
Mechanical Model ◽  
Laser Scanning ◽  
Constitutive Relationship ◽  
Transformation Kinetic ◽  
Element Analysis ◽  
Relationship Of ◽  
Phase Transformation Kinetic

In this study, tensional mechanical properties of sheet metal with heating-lines after laser scanning are investigated based on the thermal-microstructure-mechanical model. The phase transformations, during laser scanning of sheet metal, are calculated by coupling the thermal history from finite element analysis with a phase transformation kinetic model. The flow stresses of material are obtained from the constitutive relationship of the phases based on the mixture strain hardening laws. The results show that the influence of the heating-lines number on tensional mechanical properties of material is obvious. The mechanical properties are related to the distribution of microstructure in heat affected zone after laser scanning.

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