A Multi Material Shell Model for the Mechanical Analysis of Triaxial Braided Composites

García-Carpintero, A.; Herráez, M.; Xu, Jian; Lopes, C.S.; González, C.

doi:10.1007/s10443-017-9593-9

Cited by 11 publications

(9 citation statements)

References 30 publications

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“…In the case of ply architectures with higher complexity than unidirectional fibres, such as in textile composites, a subsequent homogenization step needs to be performed based on the previously computed behaviour of the unidirectional yarns, the response of the bulk resin matrix and on the topology of the Representative Unit Cell (RUC) of the fabric (e.g. [14][15][16][17]). From the orthotropic ply behaviour and lamina orientations within a ply stacking, computational mesomechanics can be used to predict the behaviour of the laminate (e.g.…”

Section: Introductionmentioning

confidence: 99%

Special-purpose elements to impose Periodic Boundary Conditions for multiscale computational homogenization of composite materials with the explicit Finite Element Method

Sádaba

Herráez

Naya

et al. 2019

Composite Structures

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A novel methodology is presented to introduce Periodic Boundary Conditions (PBC) on periodic Representative Volume Elements (RVE) in Finite Element (FE) solvers based on dynamic explicit time integration. This implementation aims at overcoming the difficulties of the explicit FE method in dealing with standard PBC. The proposed approach is based on the implementation of a user-defined element, named a Periodic Boundary Condition Element (PBCE), that enforces the periodicity between periodic nodes through a spring-mass-dashpot system. The methodology is demonstrated in the multiscale simulation of composite materials. Two showcases are presented: one at the scale of computational micromechanics, and another one at the level of computational mesomechanics. The first case demonstrates that the proposed PBCE allows the homogenization of composite ply properties through the explicit FE method with increased efficiency and similar reliability with respect to the equivalent implicit simulations with traditional PBC. The second case demonstrates that the PBCE coupled with Periodic Laminate Elements (PLE) can effectively be applied to the computational homogenization of elastic and strength properties of entire laminates taking into account highly nonlinear effects. Both cases motivate the application of

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Section: Introductionmentioning

confidence: 99%

Special-purpose elements to impose Periodic Boundary Conditions for multiscale computational homogenization of composite materials with the explicit Finite Element Method

Sádaba

Herráez

Naya

et al. 2019

Composite Structures

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“…A practical way for the analysis of a composite structure is to take an approach of a multi-scale framework (MSF) [ 68 , 69 , 70 , 71 , 72 , 73 , 74 ]. As shown in Figure 1 in the MSF the models at different scales are built independently but are combined organically so that loads and material data can be transferred between the models.…”

Section: Introductionmentioning

confidence: 99%

Analytical Micromechanics Models for Elastoplastic Behavior of Long Fibrous Composites: A Critical Review and Comparative Study

Wang

Huang

2018

Materials

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Elasto-plastic models for composites can be classified into three categories in terms of a length scale, i.e., macro scale, meso scale, and micro scale (micromechanics) models. In general, a so-called multi-scale model is a combination of those at various length scales with a micromechanics one as the foundation. In this paper, a critical review is made for the elastoplastic models at the micro scale, and a comparative study is carried out on most popular analytical micromechanics models for the elastoplastic behavior of long fibrous composites subjected to a static load, meaning that creep and dynamic response are not concerned. Each model has been developed essentially following three steps, i.e., an elastic homogenization, a rule to define the yielding of a constituent phase, and a linearization for the elastoplastic response. The comparison is made for all of the three aspects. Effects of other issues, such as the stress field fluctuation induced by a high contrast heterogeneity, the stress concentration factors in the matrix, and the different approaches to a plastic Eshelby tensor, are addressed as well. Correlation of the predictions by different models with available experimental data is shown.

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“…Characterisation and testing of braided composites loading cases are shown in Figure 3.21. In both cases, cracks were also generated at the yarn/matrix interface or grew from the inner region of the tows producing yarn to matrix interface debonding as identified in García-Carpintero et al (2017b) for tensile strength specimens. These tow/interface cracks grew stably in the fibre direction mainly driven by the resolved tensile and shear forces acting in this direction due to the applied normal stresses.…”

Section: Failure Mechanismsmentioning

confidence: 97%

“…However, these models require a considerable number of input properties, can be very complex to implement and their computational cost is high, Stig and Hallström (2012a). Computational efficiency is the biggest advantage of the CLT-models, which enable the implementation of material constitutive equations and can be used to solve structural problems using FE methods, García-Carpintero et al (2017b). The following section gives and overview of models for textile composite constitutive behaviour prediction, with a focus on models for braided composites.…”

Section: Modelling and Simulation Of Textile Compositesmentioning

confidence: 99%

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Development and validation of numerical modeling approaches for triaxially braided composites

Carpintero¹,

Cecilio²

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In recent years, the growing use of composite materials has acquired a great role, not only industrial, but also in fields such as construction, transportation or military industry, raising the necessity of an automated, cost-efficient and quality manufacturing process. The process of braiding composites allows automated production of variety of preforms due to its inherent drapability to adapt to complex shapes, in combination with a low material waste and good set of mechanical properties.

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A Multi Material Shell Model for the Mechanical Analysis of Triaxial Braided Composites

Cited by 11 publications

References 30 publications

Special-purpose elements to impose Periodic Boundary Conditions for multiscale computational homogenization of composite materials with the explicit Finite Element Method

Special-purpose elements to impose Periodic Boundary Conditions for multiscale computational homogenization of composite materials with the explicit Finite Element Method

Analytical Micromechanics Models for Elastoplastic Behavior of Long Fibrous Composites: A Critical Review and Comparative Study

Development and validation of numerical modeling approaches for triaxially braided composites

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