scholarly journals Failure properties of passive human aortic tissue. II—Biaxial tension tests

1983 ◽  
Vol 16 (1) ◽  
pp. 31-44 ◽  
Author(s):  
Dinesh Mohan ◽  
John W. Melvin
Keyword(s):  
Biaxial Tension ◽  
Aortic Tissue ◽  
Tension Tests ◽  
Failure Properties

Characterization of Hyperelastic (Rubber) Material Using Uniaxial and Biaxial Tension Tests

2012 ◽  
Vol 570 ◽  
pp. 1-7
Author(s):  
Yawar Jamil Adeel ◽  
Ahsan Irshad Muhammad ◽  
Azmat Zeeshan
Keyword(s):  
Shear Test ◽  
Biaxial Tension ◽  
Constitutive Models ◽  
Hyperelastic Material ◽  
Strain Response ◽  
Stress Strain ◽  
Rubber Material ◽  
Tension Tests ◽  
Planar Shear

Hyperelastic material simulation is necessary for proper testing of products functionality in cases where prototype testing is expensive or not possible. Hyperelastic material is nonlinear and more than one stress-strain response of the material is required for its characterization. The study was focused on prediction of hyperelastic behavior of rubber neglecting the viscoelastic and creep effects in rubber. To obtain the stress strain response of rubber, uniaxial and biaxial tension tests were performed. The data obtained from these tests was utilized to find the coefficients of Mooney-Rivlin, Odgen and Arruda Boyce models. Verification of the behavior as predicted by the fitted models was carried out by comparing the experimental data of a planar shear test with its simulation using the same constitutive models.

Effect of Cold Storage on Mechanical Properties of Aorta

2015 ◽  
Author(s):  
Shijia Zhao ◽  
John Lof ◽  
Shelby Kutty ◽  
Linxia Gu
Keyword(s):  
Mechanical Properties ◽  
Uniaxial Tension ◽  
Cold Storage ◽  
Elastic Moduli ◽  
Heart Diseases ◽  
Axial Direction ◽  
Circumferential Direction ◽  
Control Group ◽  
Aortic Tissue ◽  
Tension Tests

Aortic allografts have been widely used in treatments of congenital heart diseases with satisfactory clinical outcomes. They were usually cryopreserved and stored for surgical use. The objective of this work was to investigate the effect of cold storage on mechanical properties of aorta, since the compliance mismatch was one important factor associated with the complication after graft surgery. The segments of porcine descending aorta were divided into two groups: the fresh samples which were tested within 24 hours after harvesting served as control group, and frozen samples which were stored in −20°C for 7 days and then thawed. The uniaxial tension tests along circumferential direction and indentation tests were conducted. The average incremental elastic moduli within each stretch range were obtained from the experimental data obtained during tension tests, and the elastic moduli were also calculated by fitting the force-indentation depth data to Hertz model when the tissue was stretched at 1.0, 1.2, 1.4 and 1.6. In addition, the average incremental elastic moduli of both fresh and frozen aortic tissue along axial direction were also obtained by using uniaxial tension tests. The comparison showed that cold storage definitely increased the average incremental elastic modulus of the aortic tissue along circumferential direction; however, the difference is not significant for the elastic moduli along axial direction.

Failure Properties and Damage of Cervical Spine Ligaments, Experiments and Modeling

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Ana Trajkovski ◽  
Senad Omerović ◽  
Marija Hribernik ◽  
Ivan Prebil
Keyword(s):  
Cervical Spine ◽  
Nonlinear Response ◽  
Damage Model ◽  
Posterior Longitudinal Ligament ◽  
Coefficient Of Determination ◽  
Fiber Direction ◽  
Aging Effects ◽  
Tension Tests ◽  
Failure Properties

Cervical spine ligaments have an important role in providing spinal cord stability and restricting excessive movements. Therefore, it is of great importance to study the mechanical properties and model the response of these ligaments. The aim of this study is to characterize the aging effects on the failure properties and model the damage of three cervical spine ligaments: the anterior and the posterior longitudinal ligament and the ligamentum flavum. A total of 46 samples of human cadaveric ligaments removed within 24–48 h after death have been tested. Uniaxial tension tests along the fiber direction were performed in physiological conditions. The results showed that aging decreased the failure properties of all three ligaments (failure load, failure elongation). Furthermore, the reported nonlinear response of cervical ligaments has been modeled with a combination of the previously reported hyperelastic and damage model. The model predicted a nonlinear response and damage region. The model fittings are in agreement with the experimental data and the quality of agreement is represented with the values of the coefficient of determination close to 1.

High rate failure properties of porcine aortic tissue under uniaxial tension

2019 ◽  
pp. 1-11
Author(s):  
Piyush Gaur ◽  
Sanyam Sharma ◽  
Devendra Kumar ◽  
Anoop Chawla ◽  
Sudipto Mukherjee ◽  
...  
Keyword(s):  
Uniaxial Tension ◽  
High Rate ◽  
Aortic Tissue ◽  
Failure Properties

Characterisation of a polymer using biaxial tension tests. Part I: Hyperelasticity

2010 ◽  
Vol 81 (10) ◽  
pp. 1333-1349 ◽  
Author(s):  
Michael Johlitz ◽  
Stefan Diebels
Keyword(s):  
Biaxial Tension ◽  
Tension Tests

High rate failure properties of human aortic tissue under longitudinal extension

2018 ◽  
Vol 4 (2/3) ◽  
pp. 125 ◽  
Author(s):  
Piyush Gaur ◽  
Khyati Verma ◽  
Anoop Chawla ◽  
Sudipto Mukherjee ◽  
Sanjeev Lalwani ◽  
...  
Keyword(s):  
High Rate ◽  
Aortic Tissue ◽  
Failure Properties ◽  
Longitudinal Extension

scholarly journals Equi-biaxial tension tests on magneto-rheological elastomers

2015 ◽  
Vol 25 (1) ◽  
pp. 015015 ◽  
Author(s):  
Gerlind Schubert ◽  
Philip Harrison
Keyword(s):  
Biaxial Tension ◽  
Tension Tests ◽  
Magneto Rheological

Design of an Experimental Device for Biaxial Tension Tests Used in a Uniaxial Test Machine

2013 ◽  
Vol 554-557 ◽  
pp. 174-181
Author(s):  
Heng Kuang Tsai ◽  
Yi Wei Lin ◽  
Fuh Kuo Chen ◽  
Shi Wei Wang
Keyword(s):  
Finite Element ◽  
High Strength Steel ◽  
Biaxial Tension ◽  
High Strength ◽  
Finite Element Simulations ◽  
Advanced High Strength Steel ◽  
Steel Sheets ◽  
Biaxial Stretching ◽  
Tension Tests ◽  
Sliding Mechanism

In the present study, a set of novel clamping apparatus that could deliver biaxial stretching motions with the use of a uniaxial tensile testing machine was designed and manufactured. The conversion of uniaxial motion into biaxial stretching motions is achieved by a sliding mechanism that consists of two blocks sliding in two mutually perpendicular grooves, respectively. During the biaxial tension test, a cross-shaped specimen sitting in the grooves are stretched by the two blocks driven by a pulling rod. The different stress ratios could be obtained by adjusting the groove surface shape and the lengths of specimen wings. In the clamping apparatus design stage, the finite element simulations were performed to examine the validity of the sliding mechanism and the frictional force generated between the sliding blocks and the grooves. The coefficient of friction was determined afterwards from the comparison of the pulling forces obtained in the experiments with those calculated by the finite element simulations. In addition, the optimum geometry and dimension of the cross-shaped specimen used in the biaxial tension tests were investigated by the finite element analysis as well. The slotted specimen proposed by Kuwabara et al. was taken as the basic design. A sufficiently large area in the central region of specimen where the principal stress directions aligned with the groove direction was obtained for gluing the strain gauges to the specimen for the biaxial stretching tests. The number of slots and associated slot widths were also examined to optimize the shape of the specimens. The proposed clamping apparatus was manufactured and the biaxial tension tests were conducted with cross-shaped specimens made of advanced high strength steel sheets. The validity of the designed clamping apparatus used for biaxial tension tests was confirmed and the congruence of various yield criteria applied to the advanced high strength steel sheets subjected to biaxial stress states was discussed.

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