A Nonassociated Constitutive Model Describing Transients in Material Behaviour Induced by Strain-path Changes

2022 ◽  
pp. 103137
Author(s):  
Wen Zhang ◽  
Huachao Yang ◽  
Xincun Zhuang ◽  
Zhen Zhao
Keyword(s):  
Constitutive Model ◽  
Strain Path ◽  
Material Behaviour ◽  
Strain Path Changes

scholarly journals Study of biaxial mechanical properties of the passive pig heart: material characterisation and categorisation of regional differences

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Fulufhelo Nemavhola
Keyword(s):  
Mechanical Properties ◽  
Constitutive Model ◽  
Computational Models ◽  
Heart Diseases ◽  
Interventricular Septum ◽  
Model Material ◽  
Biaxial Test ◽  
Material Behaviour ◽  
Material Parameters ◽  
Biaxial Tests

AbstractRegional mechanics of the heart is vital in the development of accurate computational models for the pursuit of relevant therapies. Challenges related to heart dysfunctioning are the most important sources of mortality in the world. For example, myocardial infarction (MI) is the foremost killer in sub-Saharan African countries. Mechanical characterisation plays an important role in achieving accurate material behaviour. Material behaviour and constitutive modelling are essential for accurate development of computational models. The biaxial test data was utilised to generated Fung constitutive model material parameters of specific region of the pig myocardium. Also, Choi-Vito constitutive model material parameters were also determined in various myocardia regions. In most cases previously, the mechanical properties of the heart myocardium were assumed to be homogeneous. Most of the computational models developed have assumed that the all three heart regions exhibit similar mechanical properties. Hence, the main objective of this paper is to determine the mechanical material properties of healthy porcine myocardium in three regions, namely left ventricle (LV), mid-wall/interventricular septum (MDW) and right ventricle (RV). The biomechanical properties of the pig heart RV, LV and MDW were characterised using biaxial testing. The biaxial tests show the pig heart myocardium behaves non-linearly, heterogeneously and anisotropically. In this study, it was shown that RV, LV and MDW may exhibit slightly different mechanical properties. Material parameters of two selected constitutive models here may be helpful in regional tissue mechanics, especially for the understanding of various heart diseases and development of new therapies.

scholarly journals Modeling strain-path changes in aluminum and steel

2017 ◽  
Vol 117 ◽  
pp. 123-136 ◽  
Author(s):  
Jisheng Qin ◽  
Bjørn Holmedal ◽  
Kai Zhang ◽  
Odd Sture Hopperstad
Keyword(s):  
Strain Path ◽  
Strain Path Changes

Mechanisms Controlling Ductility Loss from Abrupt Strain Path Changes in a Low Carbon Steel

2021 ◽  
Author(s):  
Anastasia Vrettou ◽  
Hiroto Kitaguchi ◽  
Biao Cai ◽  
Thomas Connolley ◽  
David M. Collins
Keyword(s):  
Carbon Steel ◽  
Strain Path ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Ductility Loss ◽  
Strain Path Changes

scholarly journals In situ tension-tension strain path changes of cold-rolled Mg AZ31B

2019 ◽  
Vol 164 ◽  
pp. 135-152 ◽  
Author(s):  
K. Sofinowski ◽  
T. Panzner ◽  
M. Kubenova ◽  
J. Čapek ◽  
S. Van Petegem ◽  
...  
Keyword(s):  
Strain Path ◽  
Cold Rolled ◽  
Strain Path Changes

scholarly journals Constitutive modelling of magnesium alloy sheets under strain path changes

2016 ◽  
Vol 734 ◽  
pp. 032135
Author(s):  
Jinwoo Lee ◽  
Young-Seon Lee ◽  
Myoung-Gyu Lee ◽  
Daeyong Kim
Keyword(s):  
Magnesium Alloy ◽  
Strain Path ◽  
Constitutive Modelling ◽  
Strain Path Changes

scholarly journals Micromechanical modelling of the elastoplastic behaviour of metallic material under strain-path changes

2009 ◽  
Vol 44 (2) ◽  
pp. 285-296 ◽  
Author(s):  
Jamal Fajoui ◽  
David Gloaguen ◽  
Bruno Courant ◽  
Ronald Guillén
Keyword(s):  
Strain Path ◽  
Metallic Material ◽  
Micromechanical Modelling ◽  
Strain Path Changes
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