Multiple length/time-scale simulation of localized damage in composite structures using a Mesh Superposition Technique

Gigliotti, Luigi; Pinho, S.T.

doi:10.1016/j.compstruct.2014.11.005

Cited by 22 publications

(9 citation statements)

References 43 publications

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“…This application was later developed for predicting impact damage in an all-composite wing-box structure [26], and numerical predictions coincided well with experimental data. Approaches, involving solid-shell coupling techniques or similar, have been investigated by numerous researchers for various applications; for example, a mesh superposition technique developed by Gigliotti and Pinho [27], Sellitto et al. [28,29] for a non-matched mesh coupling techniques, Ledentsov et al [30] for applications of sheet metal forming simulation, Krueger et al [31][32][33][34] in studying composite structures with delaminations, Cho and Kim [35] in investigating bifurcation buckling behaviour of delaminated composites, and Davila and Johnson [36] in predicting compressive strength of dropped-ply laminates.…”

Section: Introductionmentioning

confidence: 99%

Barely visible impact damage in scaled composite laminates: Experiments and numerical simulations

Sun

Hallett

2017

International Journal of Impact Engineering

142

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This paper investigates the effect of size and complexity of composite structures on the formation of low-velocity impact damage via experimental tests and numerical modelling. The ASTM standard low-velocity impact test and a scaled-up version of the test were conducted. A novel numerical technique is presented that combines 3D solid and thin 2D shell elements for modelling different domains to achieve a high level of fidelity locally under the impact location, whilst achieving good computational efficiency for large structures. Together with the experimental studies at the different scales, the predictive capability of the numerical models was systematically validated. This modelling method demonstrated an advanced computational efficiency without compromising predictive accuracy. The models are applied to a case study of low-velocity impact of a large-scale stringer-stiffened panel, showing this modelling approach to be suitable for predicating low-velocity impact damage and structural response of laminated composites over a range of sizes and complexities.

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Section: Introductionmentioning

confidence: 99%

Barely visible impact damage in scaled composite laminates: Experiments and numerical simulations

Sun

Hallett

2017

International Journal of Impact Engineering

142

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“…Within the multi-level framework, there are various iterative [1][2][3][4][5][6][7] and concurrent [8][9][10][11][12][13][14][15][16] methods in the literature to include a structural detail into a larger model. In iterative (sub-modelling) approaches, a global and a local model are simulated separately within an iterative procedure.…”

Section: Introductionmentioning

confidence: 99%

A floating connector element formulation for multi-level modelling of composite structures

Kocaman

Chen

Pinho

2020

Composite Structures

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Design and optimisation of large structures, including the positioning of lower-level components, typically require extensive user involvement and sequential mechanical analysis/optimisation iterations. This paper presents an original method that enables adaptive positioning of lower-level models (such as components) within higher level-models (such as large structures), and that achieves a combined mechanical/optimisation problem for the design of structures with various hierarchical levels (such as the positioning of stiffeners within a wingbox). As the position of the lower-level model evolves, our proposed method does not require re-generating of the geometry, remeshing or modifying the stiffness matrix of the elements corresponding to the various hierarchical levels. Instead, we achieve the adaptive positioning via an original concept that we propose here: Floating Connector (FC) elements. In this paper, we validate the FC elements against reference purely-mechanical solutions, show that they can be combined with gradient-descent method and genetic algorithms, and that they can be applied to optimise the positioning of a stiffener runnout taking into account a debonding manufacturing defect.

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“…A general co-simulation scheme is presented in Sicklinger et al (2014) for coupling analyses with the same time increment. The domain decomposition method for implicit-explicit couplings through co-simulation is described in Chantrait et al (2014), coupling Zebulon and Europlexus, or in Gigliotti and Pinho (2015), coupling Abaqus/Standard with Abaqus/Explicit. Also, an acoustic-dynamic coupling for automotive brake systems is described in Esgandari and Olatunbosun (2015), with Abaqus/Standard (i.e.…”

Section: Introductionmentioning

confidence: 99%

Simulation of delamination under impact using a global–local method in explicit dynamics

Bettinotti

Allix

Perego

et al. 2017

Finite Elements in Analysis and Design

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Despite of their interest, multi-scale methods based on domain decomposition are rarely used or even implemented within legacy codes. The reason is that their implementation is very demanding and that the robustness of their performance in industrial applications is questionable. In order to try to overcome these limitations, we recently adapted to the case of explicit dynamics a global-local multi-scale method (Bettinotti et al., 2014b). So far, the method has been implemented in a Matlab code and validated on simple elastic cases. In this paper, we present the implementation of the method in Abaqus/Explicit using its co-simulation features to couple two separate Abaqus/Explicit analyses, running at different scales. The approach is illustrated in the case of the simulation of delamination under high velocity impact. A key aspect of the method, if compared to the one based on domain decomposition, is the fact that the global model covers the whole structure. This feature has been used to treat contact at the global level only, which greatly simplifies the implementation and enhances the computational performance of the method. The effectiveness of the method has been verified by comparing the results with other approaches already available in Abaqus/Explicit: the tie constraint between different regions of the model and the sub-modeling approach.

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Multiple length/time-scale simulation of localized damage in composite structures using a Mesh Superposition Technique

Cited by 22 publications

References 43 publications

Barely visible impact damage in scaled composite laminates: Experiments and numerical simulations

Barely visible impact damage in scaled composite laminates: Experiments and numerical simulations

A floating connector element formulation for multi-level modelling of composite structures

Simulation of delamination under impact using a global–local method in explicit dynamics

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