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. 2019 Sep 4;12(18):2853. doi: 10.3390/ma12182853
Nomenclature
List of definition
S=/S Second Piola-Kirchoff stress tensor Papp Applied pressure
C=/C Right Cauchy-Green strain tensor a, b, w Dimension parameters
w Internal potential energy D Degree of intimate contact
F=/F Deformation gradient tensor η Matrix viscosity
I1, I2, I3… In Invariants k1, k2 Geometric ratios
Aelong1, Aelong2 Parameter A related to elongation mode in warp, weft direction A0, An, An+1 Parameter A at initial state, before, after nth time increment
Aχ1, Aχ2 Parameter A related to bending mode in warp, weft direction Ashear, Acomp Parameter A related to in-plane shearing mode, and compression mode
T Temperature Wext, Wint, Wacc External, internal and inertial work
Ei Young’s modulus of spring element i δu Virtual displacement vector
ηi Viscosity of dashpot i u, u¨ Displacement and acceleration vectors
τi Relaxation time Fext, Fint Exterior and interior load vectors
γi Relative weight Superscript α Index related to bending, membrane, or pinching deformation
Q= Stress-like internal variable σ Cauchy stress tensor
H= Algorithmic solution of Q B Strain interpolation matrix
Dk, Ci Polynomial parameters Ωe Volume of element
ψ Free energy function T1, T2 Tensile stiffness in two directions of yarn
tn, tn+1 Times at the beginning and end of the nth time increment Mχ1, Mχ2 Bending moments in two directions of yarn
Δtn nth time increment B1, B2 Material parameters related to bending
α, β Thermo-dependent parameters