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NONLINEAR CONTINUUM
MECHANICS FOR FINITE
ELASTICITY-PLASTICITY
NONLINEAR
CONTINUUM
MECHANICS FOR
FINITE ELASTICITY-
PLASTICITY
Multiplicative Decomposition With
Subloading Surface Model
KOICHI HASHIGUCHI
Technical Adviser, MSC Software Ltd.
(Emeritus Professor of Kyushu University),
Tokyo, Japan
Elsevier
Radarweg 29, PO Box 211, 1000 AE Amsterdam, Netherlands
The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, United Kingdom
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by the Publisher (other than as may be noted herein).
Notices
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broaden our understanding, changes in research methods, professional practices, or medical
treatment may become necessary.
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ISBN: 978-0-12-819428-7
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Preface xi
1. Mathematical fundamentals 1
1.1 Matrix algebra 1
1.1.1 Summation convention 1
1.1.2 Kronecker’s delta and alternating symbol 2
1.1.3 Matrix notation and determinant 2
1.2 Vector 6
1.2.1 Definition of vector 7
1.2.2 Operations of vector 7
1.3 Definition of tensor 15
1.4 Tensor operations 18
1.4.1 Properties of second-order tensor 18
1.4.2 Tensor components 19
1.4.3 Transposed tensor 20
1.4.4 Inverse tensor 21
1.4.5 Orthogonal tensor 22
1.4.6 Tensor decompositions 24
1.4.7 Axial vector 25
1.4.8 Determinant 27
1.4.9 Simultaneous equation for vector components 30
1.5 Representations of tensors 31
1.5.1 Notations in tensor operations 31
1.5.2 Operational tensors 32
1.5.3 Isotropic tensors 34
1.6 Eigenvalues and eigenvectors 35
1.6.1 Eigenvalues and eigenvectors of second-order tensor 35
1.6.2 Spectral representation and elementary tensor functions 37
1.6.3 Cayley Hamilton theorem 38
1.6.4 Scalar triple products with invariants 39
1.6.5 Second-order tensor functions 39
1.6.6 Positive-definite tensor and polar decomposition 40
1.6.7 Representation theorem of isotropic tensor-valued tensor function 42
1.7 Differential formulae 43
1.7.1 Partial derivatives of tensor functions 43
1.7.2 Time-derivatives in Lagrangian and Eulerian descriptions 48
1.7.3 Derivatives of tensor field 49
1.7.4 Gauss’ divergence theorem 51
1.7.5 Material-time derivative of volume integration 52
v
vi CONTENTS
xi
xii Preface
Henann and Anand (2009), Brepols et al. (2014), etc., in which constitu-
tive relations are formulated in the intermediate configuration imagined
fictitiously by the unloading to the stress-free state along the hyperelas-
tic relation, based on the isoclinic concept (Mandel, 1971). However, the
plastic flow rule with the generality unlimited to the elastic isotropy
remains unsolved and only the conventional plasticity model, named by
Drucker (1998), with the yield surface enclosing the elastic domain have
been incorporated so that only the monotonic loading behavior of elasti-
cally isotropic materials is concerned in them.
The subloading multiplicative hyperelastic based plastic model has
been formulated by the author recently (Hashiguchi, 2018c), which is
capable of describing the finite elastoplastic deformation/rotation rigor-
ously under the monotonic/cyclic loading process. Further, it has been
extended to the subloading-multiplicative hyperelastic-based viscoplas-
ticity recently, which is capable of describing the rate-dependent elasto-
plastic deformation behavior at the general rate from the static to the
impact loading. It is to be the best opportunity to review the multiplica-
tive hyperelastic based plasticity comprehensively and explain the
detailed formulation of the subloading multiplicative hyperelas-
tic based plastic model systematically. This is the first book on the sub-
loading multiplicative hyperelastic based plasticity and viscoplasticity
for the description of the general irreversible deformation/sliding
behavior.
The subloading surface model and the multiplicative hyperelas-
tic based plasticity are explained comprehensively providing the
detailed physical interpretations for all relevant concepts and the deriv-
ing processes of all equations. Further, the incorporation of the subload-
ing surface model to the multiplicative hyperelastic plastic relation is
described in detail. Further, it is extended to the description of the vis-
coplastic deformation by incorporating the concept of overstress, which
is capable of describing the general rate of deformation ranging from
the quasistatic to the impact loading behaviors (Hashiguchi, 2016a,
2017a). In addition, the exact hyperelastic based plastic and viscoplastic
constitutive equation of friction (Hashiguchi, 2018c) is formulated rigor-
ously, while the hypoelastic-based plastic constitutive equation of fric-
tion has been formulated formerly (Hashiguchi et al., 2005; Hashiguchi
and Ozaki, 2008; Hashiguchi, 2013a).
The aim of this book is to give a comprehensive explanation of the
finite elastoplasticity theory and viscoplasticity under the monotonic
and the cyclic loading processes. The incorporation of the Lagrangian
tensors is required originally in the formulation of finite elastoplasticity
and viscoplasticity, since the deformation of the material involved in
the reference configuration, which is invariant through the deformation,
is physically relevant. Therefore the necessity and the meanings of the
Preface xv
Koichi Hashiguchi
June 2020
C H A P T E R
1
Mathematical fundamentals
The basic matrix algebra with some conventions and symbols appear-
ing in the continuum mechanics are described in this section.
8
>
> X 3
>
> u v 5 ur vr 5 u1 v1 1 u2 v2 1 u3 v3 ;
>
>
r r
>
> r51
>
< X3
Trr 5 Trr 5 T11 1 T22 1 T33 (1.1)
>
>
>
> r51
>
> X 3
>
>
> Tir vr 5
: Tir vr 5 Ti1 v1 1 Ti2 v2 1 Ti3 v3 ;
r51
fulfilling
δir δrj 5 δij 5 δji ; δii 5 3 (1.4)
where ð ÞT stands for the transpose of the row and the column in the
matrix.
The quantity defined by the following equation is called the determi-
nant of T and is shown by the symbol det T, that is,
T11 T12 T13
detT 5 εijk T1i T2j T3k 5 εijk Ti1 Tj2 Tk3 5 T21 T22 T23 (1.12)
T31 T32 T33
with
detTT 5 detT; detðsTÞ 5 s3 detðTÞ (1.13)
Here, the number of permutations that the suffixes i, j, and k in εijk can
take is 3!. Therefore Eq. (1.12) can be written as
1
detT 5 εijk εpqr Tip Tjq Tkr (1.14)
3!
Eq. (1.14) is rewritten as
1 1 1
detT 5 Trs ðcof TÞrs ; detT 5 T: ðcof TÞ 5 trðTðcofTÞT Þ (1.15)
3 3 3
or
detT 5 T1s ðcofTÞ1s 5 T2s ðcofTÞ2s 5 T3s ðcofTÞ3s
(1.16)
5 Tr1 ðcofTÞr1 5 Tr1 ðcofTÞr1 5 Tr2 ðcofTÞr2 5 Tr3 ðcofTÞr3
where
1
ðcofTÞip εijk εpqr Tjq Tkr (1.17)
2!
noting
1 1 1 1
εijk εpqr Tip Tjq Tkr 5 Tip εijk εpqr Tjq Tkr 5 Tip ðcofTÞip
3! 3 2! 3
ðcofTÞij is called the cofactor for the i-column and the j-row. The cofactor
is obtained through multiplying the minor determinant lacking the
ith row and jth column components by the sign ð21Þi1j .
The following lemmas for the properties of the determinant hold.
Lemma 1.1: If the first and the second rows are same, that is, T2j 5 T1j
for instance, we have εijk T1i T1j T3k 5 εjik T1j T1i T3k 5 2 εijk T1i T1j T3k .
Therefore we have the lemma “the determinant having same lines or
rows is zero.” Therefore the following relation is obtained from
Eq. (1.16) that
Tis Δjs 5 Tri Δrj 5 δij detT (1.18)
Lemma 1.2: If the first and the second lines are exchanged, that is, 122
for instance, we have εijk T2i T1j T3k 5 εjik T1i T2j T3k 5 2 εijk T1i T2j T3k .
Therefore we have the lemma “the determinant changes only its sign by
exchanging lines (or rows).”
By multiplying εijk to both sides in Eq. (1.12), we have
εijk detT 5 εijk εpqr T1p T2q T3r 5 εpqr Tip Tjq Tkr (1.19)
The additive decomposition of the components T2j into T2j 5 A2j 1 B2j
leads to
εijk T1i ðA2j 1 B2j ÞT2k 5 εijk T1i A2j T2k 1 εijk T1i B2j T2k (1.20)