Experimental tests and numerical modelling of ballistic impacts against Kevlar 29 plain-woven fabrics with an epoxy matrix: Macro-homogeneous and Meso-heterogeneous approaches

Bresciani, L.M.; Manes, Andrea; Ruggiero, Andrew; Iannitti, Gianluca; Giglio, Marco

doi:10.1016/j.compositesb.2015.10.039

Cited by 112 publications

(102 citation statements)

References 20 publications

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“…The normalized shear force and shear angle were calculated using Eqs. (3) and (4). The shear rigidity of the STF-im-AR fabric was higher than that of untreated fabric, confirming the stiffening effect of the silica particles in the PF test.…”

Section: Shear Properties Measured Using the Uniaxial Bias-extension supporting

confidence: 61%

“…Note that the nature of Slopes 1 and 2 were determined by deformation mechanism. At low shear strain, the pure shear is dominant (Slope 1 region), however as the shear strain increases, the deformation mode deviates from pure shear [3,4], i.e., intra-ply slip or yarn jamming become dominant. The gradient of Slope 1 and Slope 2 vs. angular shear rate increased linearly for both the treated and untreated fabrics.…”

Section: Shear Properties Measured Using the Uniaxial Bias-extension mentioning

confidence: 99%

“…These fibers have been chosen as soft body armor materials mainly due to their high strengths, light weights, flexibility, and heat resistances, which provide better mobility and protection, particularly in military applications [3][4][5]. The agility and mobility of soldiers wearing such soft armor depend on the performance-to-weight ratio of the materials.…”

Section: Introductionmentioning

confidence: 99%

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Shear behavior of a shear thickening fluid-impregnated aramid fabrics at high shear rate

Ahn

Han

et al. 2016

Composites Part B: Engineering

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Shear-thickening fluid-impregnated aramid (STF-im-AR) fabrics have been manufactured for advanced soft body armor applications for which they provide improved ballistic and stab resistances. It is not yet clear whether or not such improvements can be attributed solely to the STF. In this study, the rate-dependent behavior of an STF-im-AR fabric was investigated at the fabric level, using uniaxial tensile, bias-extension, and picture-frame tests. Rate-dependent behavior of the STF-im-AR fabric was observed during uniaxial tensile testing; however, the effect of the STF treatment was slight and consistent with only the inherent effect of the polymeric nature of its constituent fibers. The shear rigidity of the STF-im-AR fabric increased, due to the presence of the STF and the sensitivity of the fabric's shear stiffness to changes in the shear strain rate also increased slightly. This rate-sensitive shear stiffness of STF-im-AR fabrics may contribute to improved ballistic and stab resistances.

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Section: Shear Properties Measured Using the Uniaxial Bias-extension supporting

confidence: 61%

Section: Shear Properties Measured Using the Uniaxial Bias-extension mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Shear behavior of a shear thickening fluid-impregnated aramid fabrics at high shear rate

Ahn

Han

et al. 2016

Composites Part B: Engineering

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“…Fig. 18 Comparison of experimental tests with damage morphology obtained with meso-heterogeneous model (Bresciani et al 2016) This life-prediction model did not attempt to account for the actual damage mechanisms; instead, the laminate ply or layup was considered as a quasi-homogeneous structure. So, they assumed that the mechanisms could be captured with the use of fitting parameters or damage indices.…”

Section: Tension-tension Fatigue Modellingmentioning

confidence: 99%

“…Both marco-and meso-scale models were built and compared by Bresciani et al (2016) in order to predict ballistic behaviour of Kevlar® 29 plain-woven fabrics with an epoxy matrix. In the macro-homogeneous model, the equivalent mechanical properties were employed while in the meso-scale model, fabrics were simulated with their specific architectures and individual mechanical properties.…”

Section: High-velocity and Ballistic Impactmentioning

confidence: 99%

Modelling of Damage Evolution in Braided Composites: Recent Developments

Wang

Roy

Zhong

2017

Mech Adv Mater Mod Process

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Composites reinforced with woven or braided textiles exhibit high structural stability and excellent damage tolerance thanks to yarn interlacing. With their high stiffness-to-weight and strength-to-weight ratios, braided composites are attractive for aerospace and automotive components as well as sports protective equipment. In these potential applications, components are typically subjected to multi-directional static, impact and fatigue loadings. To enhance material analysis and design for such applications, understanding mechanical behaviour of braided composites and development of predictive capabilities becomes crucial. Significant progress has been made in recent years in development of new modelling techniques allowing elucidation of static and dynamic responses of braided composites. However, because of their unique interlacing geometric structure and complicated failure modes, prediction of damage initiation and its evolution in components is still a challenge. Therefore, a comprehensive literature analysis is presented in this work focused on a review of the state-of-the-art progressive damage analysis of braided composites with finite-element simulations. Recently models employed in the studies on mechanical behaviour, impact response and fatigue analyses of braided composites are presented systematically. This review highlights the importance, advantages and limitations of as-applied failure criteria and damage evolution laws for yarns and composite unit cells. In addition, this work provides a good reference for future research on FE simulations of braided composites.

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Analysis of mesoscale modelling strategies for woven composites

Giglio

Manes

2020

Mat Design & Process Comms

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Considering the wide applications of composite material, it is crucial to understand the corresponding damage mechanisms and mechanical response during the loading process. To achieve this aim, a mesoscale modelling strategy has been employed to provide these details. The voxel mesh and volume mesh are two types of commonly-used mesh morphologies to build a mesoscale Finite Element (FE) model. However, during the establishment of a FE mesoscale model, the effect of unit cell section, mesh size and mesh morphology on the simulation results is rarely analysed in a comprehensive way. In the present work, FE models with various mesh morphologies, unit cells and mesh sizes were built for a glass-fibre woven composite. Parametric analysis was performed under tensile and shear loading conditions and the simulation results were compared based on test data. Further, guidance about the selection of the mesh morphology, unit cell and mesh size were provided for the establishment of a mesoscale model of woven composites.

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Experimental tests and numerical modelling of ballistic impacts against Kevlar 29 plain-woven fabrics with an epoxy matrix: Macro-homogeneous and Meso-heterogeneous approaches

Cited by 112 publications

References 20 publications

Shear behavior of a shear thickening fluid-impregnated aramid fabrics at high shear rate

Shear behavior of a shear thickening fluid-impregnated aramid fabrics at high shear rate

Modelling of Damage Evolution in Braided Composites: Recent Developments

Analysis of mesoscale modelling strategies for woven composites

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