Investigation of the Internal Structure of Fiber Reinforced Geopolymer Composite under Mechanical Impact: A Micro Computed Tomography (µCT) Study

Samal, Sneha; Kolinova, Marcela; Rahier, Hubert; Poggetto, Giovanni Dal; Blanco, Ignazio

doi:10.3390/app9030516

Cited by 33 publications

(16 citation statements)

References 28 publications

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“…3. Increasing the magnetization, a strong alignment within the fillers results in an anisotropic distribution of the particles [34,35,36,37,38,39].…”

Section: Resultsmentioning

confidence: 99%

Effects of Filler Distribution on Magnetorheological Silicon-Based Composites

2019

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The smart materials subclass of magnetorheological elastomer (MRE) composites is presented in this work, which aimed to investigate the influence of filler distribution on surface morphology. Iron particles with sizes ranging from 20 to 150 µm were incorporated into the elastomer matrix and a 30% volume fraction (V%) was chosen as the optimal quantity for the filler amount in the elastomer composite. The surface morphology of MRE composites was examined by 3D micro-computed tomography (µCT) and scanning electron microscopy (SEM) techniques. Isotropic and anisotropic distributions of the iron particles were estimated in the magnetorheological elastomer composites. The filler particle distribution at various heights of the MRE composites was examined. The isotropic distribution of filler particles was observed without any influence from the magnetic field during sample preparation. The anisotropic arrangement of iron fillers within the MRE composites was observed in the presence of a magnetic field during fabrication. It was shown that the linear arrangement of the iron particle chain induced magnetization within the composite. Simulation analysis was also performed to predict the particle distribution of magnetization in the MREs and make a comparison with the experimental observations.

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“…3. Increasing the magnetization, a strong alignment within the fillers results in an anisotropic distribution of the particles [34,35,36,37,38,39].…”

Section: Resultsmentioning

confidence: 99%

Effects of Filler Distribution on Magnetorheological Silicon-Based Composites

2019

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“…The volume fraction of fiber and matrix as the function of temperature was evaluated by the simple rule of mixture. The survival strategy of fiber with respect to temperature as well as matrix behavior determines the overall strategies of the composite at higher temperature [23, 24]. Also, the developing of cracks, voids, damage, breakage of the fiber during exposure to high temperature contributes towards sustainability of composite at a respective temperature [25, 26].…”

Section: Resultsmentioning

confidence: 99%

Effect of high temperature on the microstructural evolution of fiber reinforced geopolymer composite

Samal

2019

Heliyon

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Physical evolution of geopolymeric minerals derived from metakaolin and synthesized with sodium, mixed-alkali and potassium activating solutions (Na- K) during thermal exposure. The geopolymer composites were prepared with 40 V% of fiber reinforcement such as carbon, E-glass, and basalt at the direction of in plain. Fiber reinforced geopolymer composites were exposed to the room and elevated temperatures inside the oven at air medium for a period of 30 min. The durability of the composites and internal structures with surface microstructures were examined after high temperature exposures. According to the results, geopolymer implied a prominent influence on the thermal shrinkage with the increasing of Si/Al ratios. This was attributed to the densification caused by reduction in porosity during dehydroxylation and sintering. In the case of carbon fiber reinforced composite shows transition in strength after 600 °C due to the oxide protective layer that increases the flexural strength and toughness of the composite. The flexural strength of the carbon reinforced composite increases from 17.8 to 55.8 MPa at 1000 °C. Whereas, E-glass reinforced composite shows expansion in a matrix with cage like structure helps in the sliding mechanism of fiber within the matrix, thus strength reduces towards high temperature. In case of basalt reinforces composite complete conversions into a ceramic like structure after exposure to high temperature. As a result, the crystalline nature of ceramic assists in toughened the composite structure with a brittle nature.

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“…Figure 7 shows the distribution of the magnetic induction in the system of the magnetic field with MRE included. are reported elsewhere [20][21][22]. Various modes of operation of magneto rheological elastomeric composite are tested in static, compressive (deformed), and dynamic (shear mode), to observe the effect of various magnetic flux density and the hysteresis behavior from force versus displacement response.…”

Section: Simulation Mechanism Of Mres Composite and Magnetic Flux Dismentioning

confidence: 99%

Magneto-Rheological Elastomer Composites. A Review

et al. 2020

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Magneto-rheological elastomer (MRE) composites belong to the category of smart materials whose mechanical properties can be governed by an external magnetic field. This behavior makes MRE composites largely used in the areas of vibration dampers and absorbers in mechanical systems. MRE composites are conventionally constituted by an elastomeric matrix with embedded filler particles. The aim of this review is to present the most outstanding advances on the rheological performances of MRE composites. Their distribution, arrangement, wettability within an elastomer matrix, and their contribution towards the performance of mechanical response when subjected to a magnetic field are evaluated. Particular attention is devoted to the understanding of their internal micro-structures, filler–filler adhesion, filler–matrix adhesion, and viscoelastic behavior of the MRE composite under static (valve), compressive (squeeze), and dynamic (shear) mode.

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Investigation of the Internal Structure of Fiber Reinforced Geopolymer Composite under Mechanical Impact: A Micro Computed Tomography (µCT) Study

Cited by 33 publications

References 28 publications

Effects of Filler Distribution on Magnetorheological Silicon-Based Composites

Effects of Filler Distribution on Magnetorheological Silicon-Based Composites

Effect of high temperature on the microstructural evolution of fiber reinforced geopolymer composite

Magneto-Rheological Elastomer Composites. A Review

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