Nonlinear-Elastic Orthotropic Material Modeling of an Epoxy-Based Polymer for Predicting the Material Behavior of Transversely Loaded Fiber-Reinforced Composites

Lüders, Caroline

doi:10.3390/jcs4020046

Cited by 12 publications

(11 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 9(C) shows the tensile stress versus strain curve obtained for 0 and 30 min degassing. Next, the tensile stress–strain ( σ − ε ) curve in Figure 9(C) is fitted with a nonlinear elastic model for the polymer matrix as [ 86 ] :

σ = \frac{E^{((), 0)}}{1 + italicδε} ε,

where E (0) and δ are the initial Young's modulus and factor controlling the degree of nonlinearity, respectively. Figure 9c shows the experimental stress‐strain curve fitted with the nonlinear model given in Equation ).…”

Section: Resultsmentioning

confidence: 99%

Micromechanical effect of pores on elastic properties of polymer matrix composites

et al. 2020

View full text Add to dashboard Cite

Advanced composite polymer matrix and their different manufacturing processes tend to develop pores of varying size and play a major limiting role in residual stress, damage initiation, matrix cracking, strength, and durability. Direct imaging or simulations to understand the pore formation mechanism in the viscous polymer is difficult. Ultimately, the mechanical performance of the solidified matrix needs better prediction. This paper presents a stochastic micromechanical model, including the effect of pores' formation on the polymer matrix's elastic properties. Theoretical homogenization based micromechanical models for polymer composites is reviewed in the first part. Later, a micromechanical model is proposed considering the different stages of pore formation in a polymer matrix. Polymer samples are fabricated for determining the pore distribution parameters and used appropriately in the proposed model to estimate the elastic properties for a given distribution and volume fraction of the pores. A modified Mori‐Tanaka homogenization approach and a differential scheme of inclusion of pores are incorporated in the model. Results obtained from the proposed model are compared with the experimental measurements, and a significant correlation is found.

show abstract

σ = \frac{E^{((), 0)}}{1 + italicδε} ε,

Section: Resultsmentioning

confidence: 99%

Micromechanical effect of pores on elastic properties of polymer matrix composites

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Owing to the strain energy density function and the symmetric stiffness and compliance matrices of materials, the material stiffness matrix can be expressed by 21 independent stiffness components, especially for anisotropic materials. As representative engineering materials, fiber-reinforced composites normally behave in an orthotropic manner [35,36]. In general, at least two symmetric orthogonal planes exist in an orthotropic material, which makes its material properties be directionally determined within each plane.…”

Section: -D Nonlinear and Orthotropic Constitutive Model Of A Carbon Paper Gdlmentioning

confidence: 99%

Investigation on Mechanical Properties of a Carbon Paper Gas Diffusion Layer through a 3-D Nonlinear and Orthotropic Constitutive Model

Chen

Ke²,

Ying-song³

et al. 2021

Energies

View full text Add to dashboard Cite

The mechanical loads that gas diffusion layers (GDLs) withstand in polymer electrolyte membrane fuel cell (PEMFC) stacks are sensitive to the assembly and working conditions. The mechanical properties of GDLs mostly depend on their composition materials, microstructural characteristics, operation conditions, etc. An accurate and comprehensive understanding of the mechanical performance of GDLs is significant for predicting the stress distribution and improving the assembly technology of PEMFC stacks. This study presented a novel 3-D nonlinear and orthotropic constitutive model of a carbon paper GDL to represent the material stiffness matrix with its compressive, tensile, and shear properties. Numerical simulations were performed based on the 3-D constitutive model, and the proposed 3-D model was validated against the experimental data reported previously. It is found that the simulation results of the 3-D constitutive model show a good agreement with the experimental results. Besides, the novel 3-D nonlinear and orthotropic model was applied in the overall stress simulation of a simplified PEMFC unit cell, compared to a conventional 3-D linear and isotropic model, and the simulation results of the two models show a significant difference.

show abstract

“…Much attention has been paid to the modeling of micromechanical damage mechanisms in transversally loaded UD plies [10][11][12]. Different constitutive models have been proposed to capture the resin behavior of the ply transverse to the fiber direction.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical Analysis of Mechanical Response for Unidirectional Fiber-Reinforced Plies

Song

Jackson

et al. 2021

Integr Mater Manuf Innov

View full text Add to dashboard Cite

Unidirectional fiber-reinforced composites are highly anisotropic and exhibit various damage modes at the microscale. In this study, micromechanical models for fiber, matrix and interface to study the complex behavior of unidirectional composite plies were proposed. A representative volume element (RVE) was constructed with the interface meshed as a separate layer. An orthotropic nonlinear bi-modulus model was used to capture the asymmetry mechanical behavior between tension and compression commonly observed in carbon fiber filaments. For the thermoset resin, which exhibits pressure-sensitive behavior, a Drucker-Prager elasto-plastic model is developed. An orthotropic failure model was proposed and implemented to capture the behavior of the interface. The material properties of fiber, matrix and interface were obtained by reverse engineering from experimental data or from the literature when needed. Compared results between simulation and experimental data show that one single micromechanical model can effectively capture the mechanical behavior and failure mode of the ply under different loading conditions. This is an important step toward leveraging such RVE models in a multi-scale constitutive modeling framework to predict the mechanical behavior of laminates and composite parts.

show abstract

Nonlinear-Elastic Orthotropic Material Modeling of an Epoxy-Based Polymer for Predicting the Material Behavior of Transversely Loaded Fiber-Reinforced Composites

Cited by 12 publications

References 35 publications

Micromechanical effect of pores on elastic properties of polymer matrix composites

Micromechanical effect of pores on elastic properties of polymer matrix composites

Investigation on Mechanical Properties of a Carbon Paper Gas Diffusion Layer through a 3-D Nonlinear and Orthotropic Constitutive Model

Micromechanical Analysis of Mechanical Response for Unidirectional Fiber-Reinforced Plies

Contact Info

Product

Resources

About