Stress States in Highly Flexible Thin-Walled Composite Structures by Unified Shell Model

Pagani, Alfonso; Azzara, R.; Augello, R.; Carrera, Erasmo

doi:10.2514/1.j060024

Cited by 26 publications

(6 citation statements)

References 56 publications

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“…The material properties considered in the following studies are reported in Table 1 . These materials were selected from existing literature concerning shell-like structures [ 32 , 44 ].…”

Section: Numerical Resultsmentioning

confidence: 99%

“…For the sake of brevity, the complete description of the shell formulation in the CUF domain is not within the scope of this article. The reader is referred to [ 32 , 39 ].…”

Section: Unified Finite Elements For Vat Shellsmentioning

confidence: 99%

“…In CUF, the accuracy of the model can be fine-tuned straightforwardly since the order of the structural model is treated as input of the analysis. CUF has been adopted to obtain 2D theories, which have been then extended to the analysis of multilayered, composite plates and shells, and later for beam models [ 30 , 31 , 32 ]. In recent years, CUF has also been employed in the analysis of VAT composites.…”

Section: Introductionmentioning

confidence: 99%

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Accurate Stress Analysis of Variable Angle Tow Shells by High-Order Equivalent-Single-Layer and Layer-Wise Finite Element Models

et al. 2021

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New concepts of lightweight components are conceived nowadays thanks to the advances in the manufacture of composite structures. For instance, mature technologies such as Automatic Fibre Placement (AFP) are employed in the fabrication of structural parts where fibres are steered along curvilinear paths, namely variable angle tow (VAT), which can enhance the mechanical performance and alleviate the structural weight. This is of utmost importance in the aerospace field, where weight savings are one of the main goals. For that reason, shell structures are commonly found in the aerospace industry because of their capabilities of supporting external loadings. Straight-fibre composite shell structures have been studied in recent decades and, now, spatially varying composite shells are attracting the attention of manufacturers. This work analyses the mechanical behaviour of VAT composite shells subjected to different external loadings and boundary conditions. The Carrera Unified Formulation (CUF) is employed to obtain the different structural models in a systematic and hierarchic manner. The outcomes of such numerical models are discussed and compared with commercial software Abaqus.

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“…The material properties considered in the following studies are reported in Table 1 . These materials were selected from existing literature concerning shell-like structures [ 32 , 44 ].…”

Section: Numerical Resultsmentioning

confidence: 99%

“…For the sake of brevity, the complete description of the shell formulation in the CUF domain is not within the scope of this article. The reader is referred to [ 32 , 39 ].…”

Section: Unified Finite Elements For Vat Shellsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Accurate Stress Analysis of Variable Angle Tow Shells by High-Order Equivalent-Single-Layer and Layer-Wise Finite Element Models

et al. 2021

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“…This choice is related to the required degree of accuracy and the problem's features to solve. In the framework of CUF, Taylor expansion (TE) models have been widely used, as in References 34 and 35 . In the case of TE models, the generalized displacements are expanded around the beam axis through Mclaurin polynomials of truncated order

.…”

Section: High Order 1d Finite Elementsmentioning

confidence: 99%

Quasi‐static fracture analysis by coupled three‐dimensional peridynamics and high order one‐dimensional finite elements based on local elasticity

Pagani

Enea

Carrera

2021

Numerical Meth Engineering

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This work investigates quasi-static crack propagation in specimens made of brittle materials by combining local and non-local elasticity models. The portion of the domain where the failure initiates and then propagates is modeled via three-dimensional bond-based peridynamics (PD). On the other hand, the remaining regions of the structure are analyzed with high order one-dimensional finite elements based on the Carrera unified formulation (CUF). The coupling between the two zones is realized by using Lagrange multipliers. Static solutions of different fracture problems are provided by a sequential linear analysis. The proposed approach is demonstrated to combine the advantages of the CUF-based classical continuum mechanics models and PD by providing, in an efficient manner, both the failure load and the shape of the crack pattern, even for three-dimensional problems.

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“…Due to the increasingly common engineering trend of building lightweight structures, thin-walled structures have attracted a great deal of attention over the last few decades. Numerous researchers have dedicated their work to provide highly efficient numerical tools to model and simulate the elastic behavior of thin-walled structures [1][2][3][4], deal with their design [5,6], and buckling issues [7,8], extend existing methods to isogeometric formulations [9,10], etc.…”

Section: Introductionmentioning

confidence: 99%

Geometric Analysis by Constructal Design of Stiffened Steel Plates Under Bending With Transverse I-Shaped or T-Shaped Stiffeners

et al. 2022

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Several stiffened plates arrangements subjected to bending were configured applying the Constructal Design Method (CDM) and solved by Finite Element Method (FEM), aiming through the Exhaustive Search (ES) technique analyze the influence of transverse I-Shaped or T-Shaped stiffeners in mechanical behavior. Considering a non-stiffened plate as reference and maintaining the total steel volume constant, a portion of the reference plate was deducted from its thickness, and transformed into stiffeners through the ???? volume fraction parameter, which represents the ratio between the steel volume of the stiffeners and the steel volume of the reference plate. Assuming ???? = 0.3, 25 plates with just I-Shaped stiffeners in longitudinal and transverse directions and 25 plates with I-Shaped stiffeners in longitudinal direction and T-Shaped stiffeners in transverse direction were proposed. The results showed that the plates with transverse T-Shaped stiffeners are more effective, reducing the maximum von Mises stress and maximum deflection, respectively, in up to more than 60% and 50% when compared with the plates with just I-Shaped stiffeners.

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Stress States in Highly Flexible Thin-Walled Composite Structures by Unified Shell Model

Cited by 26 publications

References 56 publications

Accurate Stress Analysis of Variable Angle Tow Shells by High-Order Equivalent-Single-Layer and Layer-Wise Finite Element Models

Accurate Stress Analysis of Variable Angle Tow Shells by High-Order Equivalent-Single-Layer and Layer-Wise Finite Element Models

Quasi‐static fracture analysis by coupled three‐dimensional peridynamics and high order one‐dimensional finite elements based on local elasticity

Geometric Analysis by Constructal Design of Stiffened Steel Plates Under Bending With Transverse I-Shaped or T-Shaped Stiffeners

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