Abstract：
:A modified split Hopkinson tension bar (SHTB) apparatus was used to investigate the dynamic tensile mechanical response of porcine muscles. A hollow aluminum alloy transmission bar and a semiconductor strain gauge were used to enhance the weak signal from porcine muscles. A ring-shaped copper pulse shaper was used to achieve stress equilibrium and constant approximate strain rates in the specimens. The thin muscle specimen, fixed by 3D-printed clamps, was warped around the bar ends to minimize the radial inertial effect during tensile loading. The quasi-static tests at strain rates of 0.1 s∧-1 were also conducted on a universal material testing machine to investigate the strain rate dependence. The true stress-strain curves of porcine muscle tissues along the fiber direction were determined at approximate strain rates of 800 s∧-1, 2000 s∧-1, and 3000 s∧-1. The experimental results show that the porcine muscle exhibits nonlinear, rate-sensitive, and orthotropic behavior. The Mooney-Rivlin model with two material constants was sufficient to represent the tensile response of porcine muscles at each strain rate. The rate-dependent Fields-Backofen model can describe the high strain rate response of the porcine muscles.
journal_name
J Mech Behav Biomed Materauthors
Wen Y,Zhang T,Yan W,Chen Y,Wang Gdoi
10.1016/j.jmbbm.2020.104279subject
Has Abstractpub_date
2021-03-01 00:00:00pages
104279eissn
1751-6161issn
1878-0180pii
S1751-6161(20)30815-8journal_volume
115pub_type
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