Abstract
A constitutive model and a finite element formulation for viscoelastic anisotropic materials subject to finite strains is expounded in this paper. The composite material is conceived as a matrix reinforced with stiff fibres. The constitutive relations are obtained by defining a strain energy function and a relaxation function for each constituent. By means of this approach, the viscoelastic properties of the material constituents can be taken into account and therefore different time dependent behaviour can be assigned to the matrix and to the reinforcing fibres. The response provided by this kind of constitutive formulation allows for the description of mechanical behaviour for either natural anisotropic tissues (such as tendons and ligaments) and for the composite materials which are currently adopted for tissue reconstruction. The main features of those mechanical properties observed in an ideal uniaxial test are: a non linear stress-strain response and a time dependent response which is observed in relaxation of stresses for a prescribed constant stretch and in a moderate strain rate dependence of the measured response.
| Original language | English |
|---|---|
| Pages (from-to) | 181-192 |
| Number of pages | 12 |
| Journal | Advanced Composites Letters |
| Volume | 9 |
| Issue number | 3 |
| Publication status | Published - 2000 |
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ASJC Scopus subject areas
- Ceramics and Composites
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A computational model of viscoelastic composite materials for ligament or tendon prostheses. / Vena, P.
In: Advanced Composites Letters, Vol. 9, No. 3, 2000, p. 181-192.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A computational model of viscoelastic composite materials for ligament or tendon prostheses
AU - Vena, P.
PY - 2000
Y1 - 2000
N2 - A constitutive model and a finite element formulation for viscoelastic anisotropic materials subject to finite strains is expounded in this paper. The composite material is conceived as a matrix reinforced with stiff fibres. The constitutive relations are obtained by defining a strain energy function and a relaxation function for each constituent. By means of this approach, the viscoelastic properties of the material constituents can be taken into account and therefore different time dependent behaviour can be assigned to the matrix and to the reinforcing fibres. The response provided by this kind of constitutive formulation allows for the description of mechanical behaviour for either natural anisotropic tissues (such as tendons and ligaments) and for the composite materials which are currently adopted for tissue reconstruction. The main features of those mechanical properties observed in an ideal uniaxial test are: a non linear stress-strain response and a time dependent response which is observed in relaxation of stresses for a prescribed constant stretch and in a moderate strain rate dependence of the measured response.
AB - A constitutive model and a finite element formulation for viscoelastic anisotropic materials subject to finite strains is expounded in this paper. The composite material is conceived as a matrix reinforced with stiff fibres. The constitutive relations are obtained by defining a strain energy function and a relaxation function for each constituent. By means of this approach, the viscoelastic properties of the material constituents can be taken into account and therefore different time dependent behaviour can be assigned to the matrix and to the reinforcing fibres. The response provided by this kind of constitutive formulation allows for the description of mechanical behaviour for either natural anisotropic tissues (such as tendons and ligaments) and for the composite materials which are currently adopted for tissue reconstruction. The main features of those mechanical properties observed in an ideal uniaxial test are: a non linear stress-strain response and a time dependent response which is observed in relaxation of stresses for a prescribed constant stretch and in a moderate strain rate dependence of the measured response.
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UR - http://www.scopus.com/inward/citedby.url?scp=0034553932&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0034553932
VL - 9
SP - 181
EP - 192
JO - Advanced Composites Letters
JF - Advanced Composites Letters
SN - 0963-6935
IS - 3
ER -