Study on the Compressible Hyperelastic Constitutive Model of Tire Rubber Compounds under Moderate Finite Deformation

2004 ◽  
Vol 77 (2) ◽  
pp. 230-241 ◽  
Author(s):  
Yong Xia ◽  
W. Li ◽  
Yuanming Xia
Keyword(s):  
Uniaxial Tension ◽  
Finite Deformation ◽  
Grid Method ◽  
Tension Test ◽  
Model Parameters ◽  
Chain Model ◽  
Tire Rubber ◽  
Test Form ◽  
Uniaxial Tension Test ◽  
Rubber Compounds

Abstract In this paper, the Automated Grid Method is applied to the uniaxial tension test of tire rubber compounds under moderate finite deformation. The test precision is improved, and the strains along axial and transversal directions are obtained simultaneously, so that compressibility of the rubber compounds can be studied directly. Based on the Eight-Chain model, and inspired with the physical idea of Van der Waals model, we put forward a modified Eight-Chain model, and generalize it into compressibility. All of the model parameters can be determined with the data obtained merely in uniaxial tension test with the Automated Grid Method, without the dependence on the data of any other test form. Fitted results show that modified Eight-Chain model can better characterize the hyperelastic mechanical behavior of incompressible and compressible rubber compounds under moderate finite deformation.

A Novel Planar Tension Test of Rubber for Evaluating the Prediction Ability of the Modified Eight-Chain Model under Moderate Finite Deformation

2005 ◽  
Vol 78 (5) ◽  
pp. 879-892 ◽  
Author(s):  
Yong Xia ◽  
Yi Dong ◽  
Yuanming Xia ◽  
Wei Li
Keyword(s):  
Finite Deformation ◽  
Three Dimensional ◽  
Constitutive Models ◽  
Grid Method ◽  
Tension Test ◽  
Chain Model ◽  
Prediction Ability ◽  
Rubber Material ◽  
Deformation State ◽  
Heterogeneous Deformation

Abstract In this paper, a novel planar tension test is applied to evaluate the prediction ability of the rubber constitutive models under moderate finite deformation. Based on the automated grid method, it is found that in planar test, deformation in the center region of the specimen is homogeneous but that of the whole specimen is heterogeneous. With three dimensional (3D) finite element (FE) modeling, both the load-stretch relationship and the deformation fields predicted by various constitutive models are obtained under heterogeneous deformation state of the planar tension. By comparing FEA results to the test results, the prediction abilities of these constitutive models are evaluated. According to the results of this heterogeneous planar tension test, the modified eight-chain model is found to be more successful than the eight-chain model and the Van del Waals model in predicting the observed hyperelastic behaviors of rubber material under different deformation states.

Formability of Tailor Welded Blanks Based on the Improved Rule of Mixture Considering the Welding Residual Strain and Stress

2012 ◽  
Vol 152-154 ◽  
pp. 1406-1412
Author(s):  
Yan Li Song ◽  
Lin Hua
Keyword(s):  
Uniaxial Tension ◽  
Residual Strain ◽  
Strain Increment ◽  
Tension Test ◽  
Improved Method ◽  
Uniaxial Tension Test ◽  
Tailor Welded Blanks ◽  
Punch Load ◽  
Weld Properties ◽  
Strain Stress

In this paper, the rule of mixture, which is often used to derive the weld properties from the uniaxial tension test of a subsize welded specimen, was improved by taking the residual welding strain/stress into account and assuming iso-strain increment across the welded specimen. Based on this improved method, hardening data of two different tailor welded blanks were determined. Erichsen cupping tests were performed experimentally and numerically to evaluate the effects of welding residual strain and stress on TWB formability. The results indicate that: (1) the residual strain and stress affect the formality of TWBs to some extent and (2) neglecting the welding residual strain and stress may predict a delayed crack onset and relatively large values in the maximum punch load and Erichsen index.

scholarly journals Complete Stress-Strain Curves of Rock in Uniaxial Tension Test.

1995 ◽  
Vol 111 (1) ◽  
pp. 25-29 ◽  
Author(s):  
Katsunori FUKUI ◽  
Fengnian JIN ◽  
Seisuke OKUBO
Keyword(s):  
Uniaxial Tension ◽  
Tension Test ◽  
Stress Strain ◽  
Uniaxial Tension Test

scholarly journals Four Misunderstandings in Uniaxial Tension Test of Concrete

2005 ◽  
Vol 16 (1) ◽  
pp. 77-86 ◽  
Author(s):  
Hiroshi Akita ◽  
Hideo Koide ◽  
Hirozo Mihashi
Keyword(s):  
Uniaxial Tension ◽  
Tension Test ◽  
Uniaxial Tension Test
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