Damage accumulation in textile composites

Gorbatikh, Larissa; Lomov, Stepan Vladimirovitch

doi:10.1016/b978-1-78242-286-0.00003-0

Cited by 11 publications

(11 citation statements)

References 44 publications

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“…Increasing the load level, the straitening of yarns in two more loaded parts of the specimen and the consequent contraction of the same for Poisson’s effect provided an increasing concentration of the transverse strain which could indicate the beginning of local and intra-ply delaminations (see e.g. Gorbatikh and Lomov 23 and Carvelli et al. 24 ).…”

Section: Resultsmentioning

confidence: 99%

The effect of microfibrils cellulose modified epoxy on the quasi-static and fatigue behaviour of open hole carbon textile composites

Carvelli

Fujii

Okubo

2018

Journal of Composite Materials

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The extensive experimental investigation aimed to assess the effects of hybrid epoxy resin with micro-fibrillated cellulose on tensile quasi-static and fatigue behaviour of open hole carbon plain weave composites. The hybridization of the matrix allowed an improved damage tolerance of the composite leading to increase of the quasi-static tensile strength and extension of the fatigue life. The enhanced mechanical performance of the notched composites was connected to the bridging effect of cellulose microfibrils preventing or delaying the cracks propagation in the matrix and along the fibres interface. The better distribution of the stress state was assessed by digital image correlation strain maps around the hole and the imparted fatigue damage was analysed by scanning electron microscope and X-ray micro-computed tomography visualizations.

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Section: Resultsmentioning

confidence: 99%

The effect of microfibrils cellulose modified epoxy on the quasi-static and fatigue behaviour of open hole carbon textile composites

Carvelli

Fujii

Okubo

2018

Journal of Composite Materials

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“…During the cyclic loadings, the damage evolution was connected to the macro mechanical behavior in terms of fatigue life diagram, elastic modulus degradation, and cycle energy dissipation. 134,166,167 Same damage mechanisms and their sequence were observed during quasi-static tensile 169 and tensile-tensile cyclic loading 170 of textile composites. The sequence of damage events showed two characteristic thresholds of the applied quasi-static load, which were connected to specific damage mechanisms.…”

Section: Fatigue Of Compositesmentioning

confidence: 86%

Contributions of Stepan V Lomov to the research and development of composite materials

Jain

Boisse

Carvelli

et al. 2020

Journal of Composite Materials

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This paper presents a comprehensive review of the scientific and engineering contributions of Prof. Stepan V. Lomov in a career spanning over 3 decades. Starting from his early work on the modelling of dry textiles, different aspects of composite materials have benefited from his inspiring contribution. His wide scientific curiosity drove the research on several topics, covering permeability, forming, damage, fatigue, nano-engineered composites, as well as development of analytical and numerical models at different scales. The paper presents a full spectrum of his scientific career aiming to link his achievements and the future research on composite materials.

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“…From the fatigue point of view it can be stated that: advanced airplane structures exposed to acoustic loading are designed as sandwiches so classical fibre-reinforced composite laminates are tested rather for material properties (Talreja 2016; Gorbatikh and Lomov, 2016), but no specific structural behaviour under acoustic loading is studied in cited references; and applied acoustic loading, regarding the tested panel with the simulated production imperfection, was below the fatigue limit of the structure.…”

Section: Discussionmentioning

confidence: 99%

“…It should be underscored that advanced composite parts exposed to acoustic loading and vibration are recently designed as sandwich structures (Cunningham and White, 2004; Nilsson, 2014). However, only a few studies are concerned with dynamic behaviour of a composite panel with the same laminate structure as is the air duct on Figure 1 designed (Talreja, 2016; Gorbatikh and Lomov, 2016). The main difference between the two types of composite structures is their mechanism of failures – delamination growth in the classical composite laminates and de-bonding between the composite skin and the sandwich core in the sandwich structures.…”

Section: Introductionmentioning

confidence: 99%

Dynamic behaviour of composite panels under acoustic loading

Běhal

Zděnek

2019

IJSI

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Purpose There are structural elements on the aircraft that may be exposed to high-intensity sound levels. One of them is an air inlet duct of the jet engine. To prepare data for the air duct damage tolerance analysis, flat panels were tested under acoustic loading. The paper aims to discuss this issue. Design/methodology/approach The acoustic fatigue test equipment for grazing wave’s incidence was designed based on the FE analyses. Flat composite panels were designed and manufactured using the Hexply 8552/AGP193-PW prepreg with the simulation of production imperfections or operational damage. The dynamic behaviour of panels has been tested using three regimes of acoustic loading: white noise spectrum, engine noise spectrum and discrete harmonic frequencies. The panel deflection was monitored along its longitudinal axis, and the ultrasonic NDT instruments were used for the monitoring of relevant delamination increments. The FE model of the panel was created in Abaqus to study panel dynamic characteristics. Findings No delamination progress was observed by NDT testing even if dynamic characteristics, especially modal frequency, of the panel changed during the fatigue test. Rayleigh damping coefficients were evaluated for their use in FE models. Significant differences were found between the measured and computed panel deflection curves near the edge of the panel. Originality/value The research results underscored the signification of the FE model boundary conditions and the element type selections when the panel works like a membrane rather than a plate because of their low bending stiffness.

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Damage accumulation in textile composites

Cited by 11 publications

References 44 publications

The effect of microfibrils cellulose modified epoxy on the quasi-static and fatigue behaviour of open hole carbon textile composites

The effect of microfibrils cellulose modified epoxy on the quasi-static and fatigue behaviour of open hole carbon textile composites

Contributions of Stepan V Lomov to the research and development of composite materials

Dynamic behaviour of composite panels under acoustic loading

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