An integrable Eulerian rate formulation of finite deformation elasticity is developed, which relates the Jaumann or other objective corotational rate of the Kirchhoff stress with material spin to the same rate of the left Cauchy–Green deformation measure through a deformation dependent constitutive tensor. The proposed constitutive relationship can be written in terms of the rate of deformation tensor in the form of a hypoelastic material model. Integrability conditions, under which the proposed formulation yields (a) a Cauchy elastic and (b) a Green elastic material model are derived for the isotropic case. These determine the deformation dependent instantaneous elasticity tensor of the material. In particular, when the Cauchy integrability criterion is applied to the stress-strain relationship of a hyperelastic material model, an Eulerian rate formulation of hyperelasticity is obtained. This formulation proves crucial for the Eulerian finite strain elastoplastic model developed in part II of this work. The proposed model is formulated and integrated in the fixed background and extends the notion of an integrable hypoelastic model to arbitrary corotational objective rates and coordinates. Integrability was previously shown for the grade-zero hypoelastic model with use of the logarithmic (D) rate, the spin of which is formulated in principal coordinates. Uniform deformation examples of rectilinear shear, closed path four-step loading, and cyclic elliptical loading are presented. Contrary to classical grade-zero hypoelasticity, no shear oscillation, elastic dissipation, or ratcheting under cyclic load is observed when the simple Zaremba–Jaumann rate of stress is employed.
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March 2013
Research-Article
Eulerian Framework for Inelasticity Based on the Jaumann Rate and a Hyperelastic Constitutive Relation—Part I: Rate-Form Hyperelasticity
Amin Eshraghi,
Amin Eshraghi
1
Research Associate
e-mail: maeshrag@uwaterloo.ca
Department of Mechanical and
Mechatronics Engineering
,University of Waterloo
,Waterloo, Ontario, N2L 3G1
, Canada
e-mail: maeshrag@uwaterloo.ca
1Corresponding author.
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Katerina D. Papoulia,
Katerina D. Papoulia
Associate Professor
Department of Applied Mathematics,
University of Waterloo,
Waterloo, Ontario, N2L 3G1, Canada
e-mail: papoulia@uwaterloo.ca
Department of Applied Mathematics,
University of Waterloo,
Waterloo, Ontario, N2L 3G1, Canada
e-mail: papoulia@uwaterloo.ca
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Hamid Jahed
Hamid Jahed
Professsor
e-mail: hjahedmo@uwaterloo.ca
Department of Mechanical and
Mechatronics Engineering
,University of Waterloo
,Waterloo, Ontario, N2L 3G1
, Canada
e-mail: hjahedmo@uwaterloo.ca
Search for other works by this author on:
Amin Eshraghi
Research Associate
e-mail: maeshrag@uwaterloo.ca
Department of Mechanical and
Mechatronics Engineering
,University of Waterloo
,Waterloo, Ontario, N2L 3G1
, Canada
e-mail: maeshrag@uwaterloo.ca
Katerina D. Papoulia
Associate Professor
Department of Applied Mathematics,
University of Waterloo,
Waterloo, Ontario, N2L 3G1, Canada
e-mail: papoulia@uwaterloo.ca
Department of Applied Mathematics,
University of Waterloo,
Waterloo, Ontario, N2L 3G1, Canada
e-mail: papoulia@uwaterloo.ca
Hamid Jahed
Professsor
e-mail: hjahedmo@uwaterloo.ca
Department of Mechanical and
Mechatronics Engineering
,University of Waterloo
,Waterloo, Ontario, N2L 3G1
, Canada
e-mail: hjahedmo@uwaterloo.ca
1Corresponding author.
Manuscript received July 15, 2012; final manuscript received September 8, 2012; accepted manuscript posted September 29, 2012; published online January 30, 2013. Assoc. Editor: Krishna Garikipati.
J. Appl. Mech. Mar 2013, 80(2): 021027 (11 pages)
Published Online: January 30, 2013
Article history
Received:
July 15, 2012
Revision Received:
September 8, 2012
Accepted:
September 29, 2012
Citation
Eshraghi, A., Papoulia, K. D., and Jahed, H. (January 30, 2013). "Eulerian Framework for Inelasticity Based on the Jaumann Rate and a Hyperelastic Constitutive Relation—Part I: Rate-Form Hyperelasticity." ASME. J. Appl. Mech. March 2013; 80(2): 021027. https://doi.org/10.1115/1.4007723
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