Electromechanical hysteresis in filled elastomers

Focatiis, Davide De; Hull, D. E.; Sánchez-Valencia, Andrea

doi:10.1201/b11687-45

Cited by 2 publications

(1 citation statement)

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“…Dorfmann and Ogden [Dorfmann and Ogden, 2003] presented a new pseudo-elastic constitu-tive model, specifying that the actual uniaxial response of the carbon filled rubber was taken only after six pre-conditioning cycles. The electrical resistivity-strain re-sponse of carbon filled rubbers was measured by De Focatiis et al [De Focatiis et al, 2011] after four preliminary cycles. Hariharaputhiran and Saravanan [Hariharaputhiran and Saravanan, 2016] mentioned that only data collected from the last cycle were used to evaluate the stored energy of rubber sheets.…”

Section: Introductionmentioning

confidence: 99%

The Role of Pre-Conditioning Frequency in the Experimental Characterization of Hyper-Elastic Materials as Models for Soft Tissue Applications

Gelidi

Tozzi

Bucchi

2016

Int. J. Appl. Mechanics

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Rubber-like materials as many soft tissues can be described as incompressible and hyper-elastic materials. Their comparable elastic behavior, up to a certain extent, has been exploited to develop and test experimental methodologies to be then applied to soft biological tissues such as aortic wall. Hence, theoretical and experimental simulation of aortic tissue, and more generally blood vessel tissue, has been often conducted using rubbers. Despite all the efforts in characterizing such materials, a clear and comprehensive testing procedure is still missing. In particular, the influence of pre-conditioning in the mechanical response of hyper-elastic materials has been often neglected. In this paper, the importance of pre-conditioning is demonstrated by: (i) exploring the effect of stretching frequency applied before the uniaxial tensile test; (ii) recognizing the role of specimen geometry and strain amplitude; (iii) verifying the impact of experimental data acquisition on finite element predictions. It was found that stress–strain relationship shows a statistical difference between some frequencies of pre-conditioning and its absence. Only certain pre-conditioning frequencies were able to generate repeatable experimental data for strip or dumb-bell shapes. This feature corresponds to a consistent reduction in the scatter of critical pressures obtained by numerical simulations.

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Section: Introductionmentioning

confidence: 99%