Failure of Unidirectional Fiber Reinforced Composites: A Case Study in Strength of Materials

Talreja, Ramesh

doi:10.1007/s11029-023-10091-0

Cited by 5 publications

(2 citation statements)

References 48 publications

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“…Such criteria should hence be applied in later design phases. Moreover, the validity of simpler multi-axial failure criteria, such as Tsai-Wu and Tsai-Hill for general purpose failure evaluation has been questioned in recent research, see Talreja (2023). Max strain and stress criteria are therefore deemed suitable for preliminary design in general but is also accepted by design guidelines for wind turbine blades (DNV-GL 2015).…”

Section: Failure Analysismentioning

confidence: 99%

Multi-material and thickness optimization of a wind turbine blade root section

Hermansen,

Lund

2024

Struct Multidisc Optim

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Structural optimization has been shown to be an invaluable tool for solving large-scale challenging design problems, and this work concerns such optimization of a state-of-the-art laminated composite wind turbine blade root section. For laminated composites structures, the key design parameters are material choice, fiber orientation, stacking sequence, and layer thickness, however a framework for treating these simultaneously in optimization, on the current wind turbine blade scale, has not been demonstrated. Thus, the motivation and novelty of the present work is providing and demonstrating a general gradient-based approach applicable to wind turbine blades, where the key design parameters and structural criteria, i.e., buckling, static strength, and fatigue damage, are considered for multiple design load cases. The optimization framework is based on a variation of the Discrete Material and Thickness Optimization approach, where the thickness is directly parametrized, allowing for appropriately treating the sandwich parts of the blade. It is demonstrated how optimization leads to a design consisting of complex variable-thickness laminates, a good overall distribution of the structural criteria in the model, and a significant reduction in mass compared to the initial design.

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Section: Failure Analysismentioning

confidence: 99%

Multi-material and thickness optimization of a wind turbine blade root section

Hermansen,

Lund

2024

Struct Multidisc Optim

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“…This damage initially manifests at the micro-level, occurring at a scale comparable to the fiber diameter. It involves phenomena such as fiber breakage, micro-cracking in the matrix, and localized fiber/matrix de-bonding [10]. With the progression of damage, these micro-level effects aggregate into macro-scale manifestations, encompassing matrix splitting, the wedge effect, and the scissoring effect [11].…”

Section: Introductionmentioning

confidence: 99%

An Anisotropic Damage-Plasticity Constitutive Model of Continuous Fiber-Reinforced Polymers

Chen,

2024

Polymers

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Accurate structural analyses of continuous fiber-reinforced polymers (FRPs) are imperative for diverse engineering applications, demanding efficient material constitutive models. Nonetheless, the constitutive modeling of FRPs is complicated by the nonlinear behavior resulting from internal damages and the inherent plasticity. Consequently, this study presents an innovative anisotropic constitutive model for FRPs, designed to adeptly capture both the damage evolution and plasticity. All requisite parameters can be easily obtained through fundamental mechanical tests, rendering the model practical and user-friendly. The model utilizes the three-dimensional Puck criteria to determine damages, initiating the evolution process through a combination of continuum damage mechanics and linear stiffness attenuation methods. This evolution is coupled with a one-parameter plastic model. Subsequently, the numerical implementation method, integrated into ANSYS, is detailed. This emphasizes the Cauchy stress and consistent tangent stiffness solution strategy. Finally, the effectiveness of the developed model is demonstrated through comprehensive verification, encompassing existing biaxial tension and open-hole-tension tests conducted on carbon and glass FRP laminates. The simulation results exhibit a remarkable correspondence with the experimental data, validating the reliability and accuracy of the proposed model.

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Damage and Fracture of Composites

Talreja

2024

Comprehensive Mechanics of Materials

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Failure of Unidirectional Fiber Reinforced Composites: A Case Study in Strength of Materials

Cited by 5 publications

References 48 publications

Multi-material and thickness optimization of a wind turbine blade root section

Multi-material and thickness optimization of a wind turbine blade root section

An Anisotropic Damage-Plasticity Constitutive Model of Continuous Fiber-Reinforced Polymers

Damage and Fracture of Composites

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