Compressive stress-hydrothermal aging behavior and constitutive model of shield tunnel EPDM rubber material

2022 ◽  
Vol 320 ◽  
pp. 126298
Author(s):  
Yankai Liu ◽  
Qingsong Zhang ◽  
Rentai Liu ◽  
Mengjun Chen ◽  
Chunyu Zhang ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Compressive Stress ◽  
Shield Tunnel ◽  
Aging Behavior ◽  
Hydrothermal Aging ◽  
Rubber Material ◽  
Epdm Rubber

Analysis of Packer Rubber Mechanics Properties

2014 ◽  
Vol 971-973 ◽  
pp. 380-389
Author(s):  
Jian Ning Wang ◽  
Gang Wu ◽  
Wei Yi Xie ◽  
Xin De Han ◽  
Ming Chao Gang
Keyword(s):  
Finite Element ◽  
Elastic Modulus ◽  
Constitutive Model ◽  
Contact Stress ◽  
Theoretical Basis ◽  
Element Model ◽  
Rubber Material ◽  
Bottom Hole ◽  
Sealing Performance ◽  
The Finite Element Model

Abstract: The packer rubber stress in the bottom hole is more complex. Based on constitutive model of the packer rubber material, this paper determines such parameters as model constants, Poisson's ratio of rubber materials and elastic modulus by using experimental method, to build up the finite element model of center tube-rubber cylinder-casing for the purpose of stress analysis. Finally, the distribution regularity of rubber cylinder-casing contact stress and packer setting travel distance with varying loads is concluded. The results can provide the theoretical basis for further analysis of packer rubber sealing performance.

The Accurate Prediction Method of Tension Modulus for Nylon Cord/Rubber Composite Material

2014 ◽  
Vol 575 ◽  
pp. 115-120
Author(s):  
Jie Ren ◽  
Jian Lin Zhong
Keyword(s):  
Composite Material ◽  
Numerical Model ◽  
Constitutive Model ◽  
Calculation Method ◽  
Prediction Method ◽  
Accurate Prediction ◽  
Prediction Formula ◽  
Rubber Material ◽  
Rubber Composite ◽  
Equivalent Modulus

To study the change rule of tension modulus for nylon cord/rubber composite material, a accurate prediction method is provided. Firstly, the calculation method for relevant parameters for rubber material Mooney-Rivilin constitutive model is proposed , the amendment formula for cord tension modulus is derived. Secondly, based on composite material micromechanics, the accurate numerical model is built, the equivalent modulus is calculated and compared to the experiment results in reference. Finally, the accurate prediction formula of tension modulus for the nylon cord/rubber composite material is provided, compare the equivalent tension modulus obtained by the prediction formula and the numerical model. The results show that: the method to build the numerical model of nylon/ cord-rubber composite material is correct, the prediction formula of the tension modulus for the nylon cord/rubber composite could predict the tension modulus well.

Time-dependent performance and constitutive model of EPDM rubber gasket used for tunnel segment joints

2015 ◽  
Vol 50 ◽  
pp. 490-498 ◽  
Author(s):  
Chenghua Shi ◽  
Chengyong Cao ◽  
Mingfeng Lei ◽  
Limin Peng ◽  
Jiajia Shen
Keyword(s):  
Constitutive Model ◽  
Time Dependent ◽  
Rubber Gasket ◽  
Epdm Rubber

Finite Element Simulation on Tire Rubber Extrusion Process

2013 ◽  
Vol 683 ◽  
pp. 548-551 ◽  
Author(s):  
Jian Wu ◽  
Qiang Liu ◽  
You Shan Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Constitutive Model ◽  
Process Parameters ◽  
Element Model ◽  
Extrusion Process ◽  
Rubber Material ◽  
Element Simulation ◽  
Rubber Part

Tires are a key part of the vehicle, mainly constituted by rubber materials. Extrusion is one of the important processes of rubber part, which is critical to the quality of the tire. Therefore, it is necessary to study the extrusion process of rubber material. In this paper, a finite element model of the rubber extrusion process was developed by using the Euler-Lagrange coupling method based on the research on rubber constitutive model. Results indicated that: extrusion expansion phenomenon existed in rubber extrusion process, which was consistent with the reality; rubber extrusion process parameters can be optimized by finite element method, and the quality of tire was also improved.

Shear Rheological Properties of Sericite-Greisen Phyllite

2012 ◽  
Vol 616-618 ◽  
pp. 162-165 ◽  
Author(s):  
Guang Ming Ren ◽  
Xue Qin Duan ◽  
Xin Yuan Jia
Keyword(s):  
Mechanical Properties ◽  
Rock Mass ◽  
Constitutive Model ◽  
Laboratory Tests ◽  
Geological Structure ◽  
Aging Behavior ◽  
Shear Creep ◽  
Long Term Stability ◽  
Study Laboratory

Creep and aging behavior, the inherent mechanical properties of rocks, are important evidences for analysis of geological structure and prediction of long term stability of rock mass. In this study, laboratory tests are carried out to investigate the shear creep occurring along the schistosities of sericite-greisen phyllite, and a rheological constitutive model of phyllite is established subsequently. On this basis, a fitting analysis of the test data using Burgers model is made, thus providing a reference for rheological calculation of rock mass of this type

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