Abstract
The study is devoted to the geometrically nonlinear simulation of fiber-reinforced composite structures. The applicability of the multiplicative approach to the simulation of viscoelastic properties of a composite material is assessed, certain improvements are suggested. For a greater accuracy in applications involving local compressive fiber buckling, a new family of hyperelastic potentials is introduced. This family allows us to account for the variable critical compressive stress, which depends on the fiber-matrix interaction. For the simulation of viscoelasticity, the well-established Sidoroff decomposition of the deformation gradient is implemented. To account for the viscosity of the matrix material, the model of Simo and Miehe (Comput Methods Appl Mech Eng 98:41–104, 1992) is used; highly efficient iteration-free algorithms are implemented. The viscosity of the fiber is likewise described by the multiplicative decomposition of the deformation gradient, leading to a scalar differential equation; an efficient iteration-free algorithm is proposed for the implicit time stepping. The accuracy and convergence of the new iteration-free method is tested and compared to that of the standard scheme implementing the Newton iteration. To demonstrate the applicability of the approach, a pressurized multi-layer composite pipe is modelled; the so-called stretch inversion phenomenon is reproduced and explained. The stress distribution is obtained by a semi-analytical procedure; it may serve as a benchmark for FEM computations. Finally, the issue of the parameter identification is addressed.
Original language | English |
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Pages (from-to) | 3779-3794 |
Number of pages | 16 |
Journal | Meccanica |
Volume | 53 |
Issue number | 15 |
DOIs | |
Publication status | Published - 1 Dec 2018 |
Keywords
- Efficient numerics
- Fiber-reinforced composite
- Hyperelasticity
- Large strain
- Multiplicative decomposition
- Viscoelasticity
- BEHAVIOR
- FIELD
- STATE
- COMPOSITES
- MODEL
- LINEAR VISCOELASTICITY
- FORMULATION
- MECHANICS
- ARTERIES
- FREE-ENERGY