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Nomenclature
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List of definition
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/S
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Second Piola-Kirchoff stress tensor |
Papp
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Applied pressure |
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/C
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Right Cauchy-Green strain tensor |
a, b, w |
Dimension parameters |
| w |
Internal potential energy |
D |
Degree of intimate contact |
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/F
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Deformation gradient tensor |
η |
Matrix viscosity |
| I1, I2, I3… In
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Invariants |
k1, k2
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Geometric ratios |
| Aelong1, Aelong2
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Parameter A related to elongation mode in warp, weft direction |
A0, An, An+1
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Parameter A at initial state, before, after nth time increment |
| Aχ1, Aχ2
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Parameter A related to bending mode in warp, weft direction |
Ashear, Acomp
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Parameter A related to in-plane shearing mode, and compression mode |
| T |
Temperature |
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External, internal and inertial work |
| Ei
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Young’s modulus of spring element i |
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Virtual displacement vector |
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Viscosity of dashpot i |
u,
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Displacement and acceleration vectors |
| τi
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Relaxation time |
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Exterior and interior load vectors |
| γi
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Relative weight |
Superscript α |
Index related to bending, membrane, or pinching deformation |
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Stress-like internal variable |
σ
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Cauchy stress tensor |
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Algorithmic solution of Q
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B
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Strain interpolation matrix |
| Dk, Ci
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Polynomial parameters |
Ωe
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Volume of element |
| ψ |
Free energy function |
T1, T2
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Tensile stiffness in two directions of yarn |
| tn, tn+1
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Times at the beginning and end of the nth time increment |
Mχ1, Mχ2
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Bending moments in two directions of yarn |
| Δtn
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nth time increment |
B1, B2
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Material parameters related to bending |
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α, β |
Thermo-dependent parameters |