Low-velocity impact behaviour of hemp fibre reinforced bio-based epoxy laminates

Scarponi, Claudio; Sarasini, Fabrizio; Tirillò, Jacopo; Lampani, Luca; Valente, Teodoro; Gaudenzi, Paolo

doi:10.1016/j.compositesb.2016.01.048

Cited by 71 publications

(29 citation statements)

References 23 publications

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“…In addition to the sandwich structure, experimental and computational methods have also been developed to better understand the impact response in simpler composite laminates and metallic plates. Sarasini et al [22][23][24], Zouggar et al [25], Bandaru et al [26] , Zhang et al [27], M.…”

Section: Introductionmentioning

confidence: 99%

High-temperature high-velocity impact on honeycomb sandwich panels

Xie

Meng

Ding

et al. 2018

Composites Part B: Engineering

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This work presents an investigation on the damage and high-speed impact deformation mechanisms at elevated temperatures in honeycomb sandwich panels made from PM1000 and PM2000 alloys. The impact temperatures ranged from 22°C to 866°C. The investigation was performed experimentally using a custom-made gas gun rig, and by using Finite Element and developing a phenomenological analytical model to predict the residual velocity and ballistic limit equations for the case in which the diameter of the projectile is close or smaller to the honeycomb cell length. The sizes of the holes have been also evaluated by carrying out numerical thermal loading simulations on honeycomb sandwich specimen models impacted at high speed. The predictions provided by the Finite Elements and the analytical model give a good agreement with the results from the experimental tests. The hole diameters for the two idealized normal impact cases, in which the projectile hits the cell core and at the triple-wall intersection of the core, were also presented as a function of the projectile diameter and velocity in this paper.

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Section: Introductionmentioning

confidence: 99%

High-temperature high-velocity impact on honeycomb sandwich panels

Xie

Meng

Ding

et al. 2018

Composites Part B: Engineering

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“…However, some properties of VO‐derived polymers remain an unsolved problem due to the long fatty acid chains that cause primarily increased flexibility and thus low T g value or poor mechanical resistance. Thus, many reinforcing agents were used to improve the overall properties of VO‐based materials, a lot of studies being focused on this research direction, studying, on the one hand, synthetic agents (POSS, glass fibers, and carbon nanotubes), and on the other hand, natural compounds (minerals, cellulose, and other vegetable‐based fiber) . In the literature, the hybrid materials based on VOs have been investigated in structure and physicochemical, thermal, mechanical properties, and last but not least, for the most varied applications.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, many reinforcing agents were used to improve the overall properties of VO-based materials, a lot of studies being focused on this research direction, studying, on the one hand, synthetic agents (POSS, glass fibers, and carbon nanotubes), 7,8 and on the other hand, natural compounds (minerals, cellulose, and other vegetable-based fiber). [9][10][11][12] In the literature, the hybrid materials based on VOs have been investigated in structure and physicochemical, thermal, mechanical properties, and last but not least, for the most varied applications. More specifically, Huang et al synthesized hybrid polyurethanes based on soybean oil (SO) and doubledecker silsesquioxane, and they found that T g values, thermal stability, and tensile test results were significantly improved for the materials with the inclusion of POSS.…”

Section: Introductionmentioning

confidence: 99%

New hybrid materials based on double‐functionalized linseed oil and halloysite

Bãlãnucã

Ghebaur

Stan

et al. 2018

Polymers for Advanced Techs

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A series of hybrid systems which combine double‐functionalized linseed oil (methacrylated epoxidized linseed oil) and 2 types of functionalized halloysite (methacrylated halloysite and epoxidized halloysite) was designed in the current study. The curing of the new formulated oil‐clay mixtures was performed via 2 different mechanisms under the influence of the temperature: free‐radical and anionic polymerization. The effect of the functionalized clay tubes against the oil‐based macromonomer reactivity, representing the focus of this study, was monitored by differential scanning calorimetry and Fourier transform infrared spectrometry, concluding that both types of halloysite nanotubes (HNTs) exhibit significant influence on the building of methacrylate/epoxy networks. The effect of the HNTs on the methacrylated epoxidized linseed oil network properties was studied by dynamic mechanical analysis and thermogravimetric analysis, and the morphology of the synthesized hybrids was investigated by scanning electron microscopy. The results suggested that the designed oil‐based hybrid performance is determined by the presence of the both HNT molecules.

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“…Therefore, the drop in flexural modulus with impacted specimens is attributed due to the loss of stiffness and increase in the deflection due to BVID. Furthermore, it is significantly evident and encouraging that the results for 4 mm fibri rock sample exhibits higher flexural (strength and modulus) properties when compared with common hemp FRP bio-composite sample of higher 5 mm thick under same energy levels of 5 and 10 J, used by Scarponi et al [8]. Results obtained in this study for similar thickness at both 5 and 10 J recorded greater flexural moduli of nearly 9.6 and 8.2 GPa, respectively, when compared with 7.8 and 7.4 GPa recorded at 6 and 9 J on hybrid hemp/basalt composite, as reported by Dhakal et al [9].…”

Section: Bvid Analysis and Characterisationmentioning

confidence: 64%

Influence of barely visible impact damage on post-impact residual flexural properties of hybrid Fibri Rock – Aero Eco-composites

et al. 2018

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This study experimentally investigates the effects of barely visible impact damage (BVID) under lowvelocity impact and its influence on post-impact residual flexural properties of hybrid flax-basalt Ecocomposites Fibri Rock-Aero of 2 and 4 mm in thickness using drop weight impact and 3-point bending tests. The damage-induced was characterised by X-ray micro computed tomography (X-ray µCT) technique. The results show that the post-impact residual flexural strength (PI-RFS) and modulus of the composites are dependent on their thickness and incident impact energies employed. A significant damage was evident for both types of specimens caused by microscopic inter-laminar delamination and cracks induced especially at the highest incident energy with a noticeable reduction on PI-RFS and modulus.

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Low-velocity impact behaviour of hemp fibre reinforced bio-based epoxy laminates

Cited by 71 publications

References 23 publications

High-temperature high-velocity impact on honeycomb sandwich panels

High-temperature high-velocity impact on honeycomb sandwich panels

New hybrid materials based on double‐functionalized linseed oil and halloysite

Influence of barely visible impact damage on post-impact residual flexural properties of hybrid Fibri Rock – Aero Eco-composites

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