Explicit numerical modeling assessment of basalt reinforced composites for low-velocity impact

Fragassa, Cristiano; Camargo, Felipe Vannucchi de; Pavlović, Ana; Minak, Giangiacomo

doi:10.1016/j.compositesb.2019.01.013

Cited by 29 publications

(8 citation statements)

References 26 publications

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“…The correct contact definition in explicit-code simulation software represents an essential aspect to assure the accurate determination of load transmission, and subsequently, stress calculation [50,52,53]. In the present case, both shell–particle and particle–particle contacts were considered (Figure 2).…”

Section: Methodsmentioning

confidence: 99%

Dealing with the Effect of Air in Fluid Structure Interaction by Coupled SPH-FEM Methods

et al. 2019

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Smoothed particle hydrodynamics (SPH) and the finite element method (FEM) are often combined with the scope to model the interaction between structures and the surrounding fluids (FSI). There is the case, for instance, of aircrafts crashing on water or speedboats slamming into waves. Due to the high computational complexity, the influence of air is often neglected, limiting the analysis to the interaction between structure and water. On the contrary, this work aims to specifically investigate the effect of air when merged inside the fluid–structure interaction (FSI) computational models. Measures from experiments were used as a basis to validate estimations comparing results from models that include or exclude the presence of air. Outcomes generally showed a great correlation between simulation and experiments, with marginal differences in terms of accelerations, especially during the first phase of impact and considering the presence of air in the model.

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Section: Methodsmentioning

confidence: 99%

Dealing with the Effect of Air in Fluid Structure Interaction by Coupled SPH-FEM Methods

et al. 2019

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“…The techniques used to model impact solicitations differ depending on the type of material considered [71][72][73], and particular sets of equations must be adopted to form a software-embedded constitutive model, which generally requires calibration of variables. Often, given the wide application of metals in shipbuilding, the models used for UNDEX make use of relations developed for metallic materials, which are generally highly dependent on strain rate effects [74].…”

Section: Constitutive Modelsmentioning

confidence: 99%

Survey on Experimental and Numerical Approaches to Model Underwater Explosions

Camargo

2019

JMSE

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The ability of predicting material failure is essential for adequate structural dimensioning in every mechanical design. For ships, and particularly for military vessels, the challenge of optimizing the toughness-to-weight ratio at the highest possible value is essential to provide agile structures that can safely withstand external forces. Exploring the case of underwater explosions, the present paper summarizes some of the fundamental mathematical relations for foreseeing the behavior of naval panels to such solicitation. A broad state-of-the-art survey links the mechanical stress-strain response of materials and the influence of local reinforcements in flexural and lateral-torsional buckling to the hydrodynamic relations that govern the propagation of pressure waves prevenient from blasts. Numerical simulation approaches used in computational modeling of underwater explosions are reviewed, focusing on Eulerian and Lagrangian fluid descriptions, Johnson-Cook and Gurson constitutive materials for naval panels, and the solving methods FEM (Finite Element Method), FVM (Finite Volume Method), BEM (Boundary Element Method), and SPH (Smooth Particle Hydrodynamics). The confrontation of experimental tests for evaluating different hull materials and constructions with formulae and virtual reproduction practices allow a wide perception of the subject from different yet interrelated points of view.

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“…Despite the increasing usage of composite materials, poor impact and out of plane behaviour of these materials represent a challenging and yet unsolved obstacle, which limit the wider application of composite structures. Impact induced damage, and the problems associated with that, are the limiting design criteria for composite material in aeronautical structures [14,15].…”

Section: Introductionmentioning

confidence: 99%

Effect of ply thickness on damage mechanisms of composite laminates under repeated loading

Ali¹,

Fotouhi²,

Akrami³

et al. 2020

FME Transactions

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Barely visible impact damage (BVID) occurs in composite laminates subjected to low-velocity impact. They can then exhibit significant effect on mechanical performance of laminates. Previously, it is shown, analytically and experimentally, that BVID occurs at a critical energy level and below this energy level there is no induced damage. However, repeated impact may cause BVID even below the critical energy level. This paper is a novel investigation that deals with the cyclic behaviour of quasi-isotropic glass/epoxy laminated composites under indentation, which is a quasistatic version of low-velocity impact. In particular, this study aims to investigate the ply thickness effect on matrix crack-induced delamination damage in the case of laminated composites under cyclic quasi static indentation loadings. The effect of different parameters, such as load level and ply thickness, on the damage evolution were here investigated. Tests were performed according to the ASTM 7136 standard. Since the glass layer was translucent, it was also possible to visually inspect the matrix delamination during the tests. The laminates were subjected to load levels lower than the critical load level, while there was no evidence of damages when samples were indented just once. However, by increasing the number of cycles, matrix crack-induced delamination appeared in the samples. In brief, it was observed that the ply thickness and energy level have significant effects on the intensity of the induced damage.

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Explicit numerical modeling assessment of basalt reinforced composites for low-velocity impact

Cited by 29 publications

References 26 publications

Dealing with the Effect of Air in Fluid Structure Interaction by Coupled SPH-FEM Methods

Dealing with the Effect of Air in Fluid Structure Interaction by Coupled SPH-FEM Methods

Survey on Experimental and Numerical Approaches to Model Underwater Explosions

Effect of ply thickness on damage mechanisms of composite laminates under repeated loading

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