Micro‐Computed Tomography Characterization of Isotropic Filler Distribution in Magnetorheological Elastomeric Composites

Samal, Sneha; Vlach, Jarmil; Kolinova, Marcela; Kavan, Pavel

doi:10.1002/9781119321736.ch7

Cited by 7 publications

(10 citation statements)

References 7 publications

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“…Fibers such as carbon, E-glass, and basalt shows the maximum flexural strength and young modulus with strain at various temperature. Composite samples (100 × 100 × 3 mm 3 ) were prepared, by hand lay-up technique, with fabrics of carbon, E-glass and basalt reinforcement in alumino-silicate geopolymer matrices with metakaolin binders, using piles of fabrics in the 0–90° direction [10]. The assembled fabric reinforced geopolymer composites were placed in a vacuum bag and cured, at 0.003 MPa and room temperature, for 24 h. The bag with composite was then placed in a curing oven at 70 °C for 12 h [10].…”

Section: Methodsmentioning

confidence: 99%

“…In addition, as geopolymer shows lower mechanical strength, however, fiber reinforced geopolymer shows an increase in flexural strength and its properties changes as the function of temperature [8]. As a result, on a combination of both properties of geopolymer towards fire resistance and flexural strength, it's essential to investigate the behavior of fiber reinforced geopolymer composite towards high temperature [9, 10]. The strength of the carbon fiber reinforced composite is maximum at 65 MPa observed at room temperature [11, 12].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Samal

2019

Heliyon

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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%

“…Filler, Elastomer, and MREs composite SEM images: (a) iron fillers, (b) particle size distribution in N1522 MRE composite, (c) Elastomer ZA22, (d) Elastomer N1522, (e) ZA22 Elastomer Composite, (f) N1522 Elastomer Composite, (g) Micro fibrils of ZA22 MRE composite, and (h) Micro fibrils for N1522 MRE composite. Reprinted from [18], © 2018 with permission from MDPI and from [21], © 2017 with permission from Wiley. Filler matrix adhesion induce a good wettability in the MRE composite that leads towards selfassembled particle-particle short fibrils network structure.…”

Section: Surface Characterization Using Sem and µCt Techniquementioning

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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“…The internal defects include fiber pull out, misalignment of the fiber, cracks, and damage to the matrix. In this work, we addressed the detailed statistical characterization of geometrical defects in the impacted fabric reinforced composite with 3D images captured by µCT to visualize the interior structural details with high resolution on a scale of interest for damage evaluation of the composite [21,22]. The relationships between the damaged area/volume and impact energies were established, and the composite was characterized, not only investigating the volume of the damaged area, but also the internal damage area including the internal structure and fiber breakage on the various layers of the composite structure.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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The internal structure of fiber reinforced geopolymer composite was investigated by microfocus X-ray computed tomography (µCT) under mechanical impact. µCT is a non-destructive, multi approach technique for assessing the internal structures of the impacted composites without compromising their integrity. The three dimensional (3D) representation was used to assess the impact damage of geopolymer composites reinforced with carbon, E-glass, and basalt fibers. The 3D representations of the damaged area with the visualization of the fiber rupture slices are presented in this article. The fiber pulls out, and rupture and matrix damage, which could clearly be observed, was studied on the impacted composites by examining slices of the damaged area from the center of the damage towards the edge of the composite. Quantitative analysis of the damaged area revealed that carbon fabric reinforced composites were much less affected by the impact than the E-glass and basalt reinforced composites. The penetration was clearly observed for the basalt based composites, confirming µCT as a useful technique for examining the different failure mechanisms for geopolymer composites. The durability of the carbon fiber reinforced composite showed better residual strength in comparison with the E-glass fiber one.

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Micro‐Computed Tomography Characterization of Isotropic Filler Distribution in Magnetorheological Elastomeric Composites

Cited by 7 publications

References 7 publications

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

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

Magneto-Rheological Elastomer Composites. A Review

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

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