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Artykuły w czasopismach na temat „Fibres microcracking”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Serdar, Marijana, Ana Baričević, Marija Jelčić Rukavina, Martina Pezer, Dubravka Bjegović, and Nina Štirmer. "Shrinkage Behaviour of Fibre Reinforced Concrete with Recycled Tyre Polymer Fibres." International Journal of Polymer Science 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/145918.

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Different types of fibres are often used in concrete to prevent microcracking due to shrinkage, and polypropylene fibres are among the most often used ones. If not prevented, microcracks can lead to the development of larger cracks as drying shrinkage occurs, enabling penetration of aggressive substances from the environment and reducing durability of concrete structures. The hypothesis of the present research is that polypropylene fibres, used in concrete for controlling formation of microcracks due to shrinkage, can be replaced with recycled polymer fibres obtained from end-of-life tyres. To

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2

Jafarifar, N., K. Pilakoutas, H. Angelakopoulos, and T. Bennett. "Post-cracking tensile behaviour of steel-fibre-reinforced roller-compacted-concrete for FE modelling and design purposes." Materiales de Construcción 67, no. 326 (2017): 122. http://dx.doi.org/10.3989/mc.2017.06716.

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Fracture of steel-fibre-reinforced-concrete occurs mostly in the form of a smeared crack band undergoing progressive microcracking. For FE modelling and design purposes, this crack band could be characterised by a stress-strain (σ-ε) relationship. For industrially-produced steel fibres, existing methodologies such as RILEM TC 162-TDF (2003) propose empirical equations to predict a trilinear σ-ε relationship directly from bending test results. This paper evaluates the accuracy of these methodologies and their applicability for roller-compacted-concrete and concrete incorporating steel fibres re

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Andrzej, Pawełek, Ozgowicz Wojciech, Ranachowski Zbigniew, et al. "Behaviour of Acoustic Emission in Deformation and Microcracking Processes of Mg Alloys Matrix Composites Subjected to Compression Tests." Archives of Current Research International 8, no. 2 (2017): 1–13. https://doi.org/10.9734/ACRI/2017/34598.

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Research results on both mechanical and acoustic emission (AE) behavior of Mg-Li and Mg-Al alloys matrix composites (AMC) reinforced with ceramic δ-Al<sub>2</sub>O<sub>3</sub> or carbon fibers subjected to the channel-die compression at room and elevated temperatures are presented in this paper. The AE measurements at room temperature showed that, the effect of anisotropy of the fibres distribution (random planar distribution) with respect to the compression axis appeared in the most investigated composites, whereas the AE activity at 140°C revealed a two- range character and the rate of AE ev

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4

Lau, Chee Keong, Amin Chegenizadeh, Trevor N. S. Htut, and Hamid Nikraz. "Performance of the Steel Fibre Reinforced Rigid Concrete Pavement in Fatigue." Buildings 10, no. 10 (2020): 186. http://dx.doi.org/10.3390/buildings10100186.

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Four-point bending fatigue experimental work was conducted on specimens that were cut from slabs to examine the fatigue life of concrete pavements. The variables considered were the volume fraction of fibres added in plain or steel bar reinforced concrete. It was found that the strain-based approach to fatigue testing on scaled-down concrete pavements is suitable to investigate the fatigue performance of scaled-down thin rigid pavements. The addition of fibres at 0.5% volume fraction in concrete improved the fatigue life by at least 135% and reduced the energy dissipated per cycle by 74%. As t

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5

Чуррука, М. Дж., Дж. И. Моран та Э. С. Родригес. "Влияние нанотрубок галлуазита на микрорастрескивание матрицы в эпоксидных углепластиках". Механика композитных материалов 58, № 2 (2022): 411–28. http://dx.doi.org/10.22364/mkm.58.2.11.

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Микрорастрескивание матрицы – основной фактор, ответственный за проницаемость газа в сосудах высокого давления без лейнеров и резервуарах для его хранения. Изучено введение разного массового содержания галлуазитных нанотрубок (ГНТ) с целью повышения сопротивления микрорастрескиванию. При введении в эпоксидную матрицу 5% по массе ГНТ наблюдали увеличение напряжения начала растрескивания на 50%. Более того, при аналогичном уровне плотности микротрещин наблюдали увеличение на 60% по сравнению с чистой эпоксидной смолой. Реактивный разбавитель использовали в качестве альтернативы для поддержания в

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6

Zhang, Zhongwei, Longbiao Li, and Zhaoke Chen. "Damage Evolution and Fracture Behavior of C/SiC Minicomposites with Different Interphases under Uniaxial Tensile Load." Materials 14, no. 6 (2021): 1525. http://dx.doi.org/10.3390/ma14061525.

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In this paper, the tensile damage and fracture behavior of carbon fiber reinforced silicon carbide (C/SiC) minicomposites with single- and multiple-layer interphases are investigated. The effect of the interphase on the tensile damage and fracture behavior of C/SiC minicomposites is analyzed. The evolution of matrix cracking under the tensile load of the C/SiC minicomposite with a notch is observed using the digital image correlation (DIC) method. The damage evolution process of the C/SiC minicomposite can be divided into four main stages, namely, (1) an elastic response coupled with partial r

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7

Hehn, Lucien, and Paul Predecki. "Residual Stresses in Unidirectional Al2O3 Fiber/Silicate Glass Composites by X-ray Diffraction." Advances in X-ray Analysis 34 (1990): 669–77. http://dx.doi.org/10.1154/s0376030800014981.

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AbstractUnidirectional continuous fiber composites fabricated from 20 μm diameter α-AI2O3 fibers (duPont FP) and 5 different silicate glass matrices (Corning 9013 and 7740, Owns Illinois N51A and Schott 8229 and 8228) were examined for residual strain and stress in the fibers using x-ray diffraction and the results compared with the predictions of two simple residual stress models. The glasses were chosen to have thermal expansion coefficients ranging from 1.3 to 10.2 x 10-6 /°C, compared with 7.2 x 10-6 /°C for the fiber, so as to produce a range of residual stresses. The magnitudes of the me

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8

Gu, Ping, Ping Xie, and J. J. Beaudoin. "Impedance characterization of microcracking behaviour in fibre-reinforced cement composites." Cement and Concrete Composites 15, no. 3 (1993): 173–80. http://dx.doi.org/10.1016/0958-9465(93)90006-u.

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9

Zrida, H., P. Fernberg, Z. Ayadi, and J. Varna. "Microcracking in thermally cycled and aged Carbon fibre/polyimide laminates." International Journal of Fatigue 94 (January 2017): 121–30. http://dx.doi.org/10.1016/j.ijfatigue.2016.09.017.

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10

Xu, Johanna, and Janis Varna. "Matrix and interface microcracking in carbon fiber/polymer structural micro-battery." Journal of Composite Materials 53, no. 25 (2019): 3615–28. http://dx.doi.org/10.1177/0021998319843616.

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In this paper, the propagation of radial matrix cracks and debond cracks at the coating/matrix interface in unidirectional carbon fiber structural micro-battery composite are studied numerically. The micro battery consists of a solid electrolyte-coated carbon fiber embedded in an electrochemically active polymer matrix. Stress analysis shows that high hoop stress in the matrix during charging may initiate radial matrix cracks at the coating/matrix interface. Several 2-D finite element models of the transverse plane with different arrangements of fibers and other matrix cracks were used to anal

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11

Li, R. K. Y., C. L. Choy, Zhuping Duan, and Mingqiu Zhang. "An Investigation of the Dynamic Response of Continuous Fibre Reinforced Composite Laminates - Failure Morphology." Engineering Plastics 2, no. 6 (1994): 147823919400200. http://dx.doi.org/10.1177/147823919400200602.

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By using the split Hopkinson pressure bar technique, impact tests were carried out on fully clamped three-point bending, laminated beam specimens made from continuous glass fibre and carbon fibre reinforced polyphenylene sulphide of three different lay-up sequences. This paper focuses on scanning electron microscope investigations of the impact failure morphology, with the aim of providing a phenomenological background for a new model which can describe the dynamic response behaviour during transverse impact, as well as understanding comprehensively the dominant failure patterns at high strain

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12

Li, R. K. Y., C. L. Choy, Zhuping Duan, and Mingqiu Zhang. "An Investigation of the Dynamic Response of Continuous Fibre Reinforced Composite Laminates - Failure Morphology." Polymers and Polymer Composites 2, no. 6 (1994): 355–66. http://dx.doi.org/10.1177/096739119400200602.

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By using the split Hopkinson pressure bar technique, impact tests were carried out on fully clamped three-point bending, laminated beam specimens made from continuous glass fibre and carbon fibre reinforced polyphenylene sulphide of three different lay-up sequences. This paper focuses on scanning electron microscope investigations of the impact failure morphology, with the aim of providing a phenomenological background for a new model which can describe the dynamic response behaviour during transverse impact, as well as understanding comprehensively the dominant failure patterns at high strain

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13

Rostampour, Muhammad Ali, Davood Mostofinejad, Hadi Bahmani, and Hasan Mostafaei. "Crack Assessment Using Acoustic Emission in Cement-Free High-Performance Concrete Under Mechanical Stress." Journal of Composites Science 9, no. 7 (2025): 380. https://doi.org/10.3390/jcs9070380.

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This study investigates the cracking behavior of high-performance calcium oxide-activated concrete incorporating basalt and synthetic macro fibers under compressive and flexural loading. Acoustic emission (AE) monitoring was employed to capture real-time crack initiation and propagation, offering insights into damage evolution mechanisms. A comprehensive series of uniaxial compression and four-point bending tests were conducted on fiber-reinforced and plain specimens. AE parameters, including count, duration, risetime, amplitude, and signal energy, were analyzed to quantify crack intensity and

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14

Grubor, Martina, Nina Štirmer, Marija Jelčić Rukavina, and Ana Baričević. "Effect of Recycled Tire Polymer Fibers on Autogenous Deformation of Self-Compacting Concrete." RILEM Technical Letters 5 (September 15, 2020): 33–40. http://dx.doi.org/10.21809/rilemtechlett.2020.115.

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Self-compacting concrete requires a special composition with an increased proportion of fine particles and larger volumes of paste compared to traditional vibrated concrete. Larger volumes of paste increase autogenous deformation, which can cause microcracking of concrete. The aim of this paper is to research the possibility of using recycled polymer fibers obtained from end-of-life tires to prevent micro cracking due to autogenous deformation in self-compacting concrete. Mixes of self-compacting concrete containing 1 and 2 kg/m3 of recycled tire polymer fibers and reference mixes were prepare

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15

Adili, Ehsan, and Ali Kheyroddin. "Fiber Interfacial Transition Zone Concept for Steel Fiber-Reinforced Concrete by SEM Observation." Journal of Applied Research and Technology 19, no. 4 (2021): 294–307. http://dx.doi.org/10.22201/icat.24486736e.2021.19.4.1024.

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Fiber-reinforced concrete (FRC), which has become quite popular in recent years, improves many of concrete’s mechanical properties. It uses fibers discretely and is utilized in different structures. This paper proposes, between steel fibers and concrete, a fiber interfacial transition zone (FITZ) which is the most vulnerable part of steel FRC (SFRC) because it has a high cracking and microcracking potential due to fiber-concrete separation. In the prepared specimens, steel fibers were added to concrete in hooked and twisted forms, the SFRC microstructure was studied in both cases under a scann

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16

Messas, Tidjani, Djamel Achoura, Boutrid Abdelaziz, and Belgacem Mamen. "Experimental investigation on the mechanical behavior of concrete reinforced with Alfa plant fibers." Frattura ed Integrità Strutturale 16, no. 60 (2022): 102–13. http://dx.doi.org/10.3221/igf-esis.60.08.

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Currently, the reinforcement of ordinary concrete with synthetic fibers poses ecological problems because the manufacturing process of these products is very polluting. Plant fiber composites are a new challenge for environmental protection. The present article aims to investigate the mechanical behavior of concrete reinforced with natural fibers, called alfa fibers. Compression and three-point bending tests have been performed on cubic and prismatic samples, respectively. Different fiber lengths (2.5, 5, and 8 cm) and content (0.6, 1.2, and 1.8%by volume) of alfa fibers have been used to exam

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17

Kim, Seungwon, and Cheolwoo Park. "Flexural Behavior of High-Volume Steel Fiber Cementitious Composite Externally Reinforced with Basalt FRP Sheet." Journal of Engineering 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/2857270.

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High-performance fiber-reinforced cementitious composites (HPFRCCs) are characterized by unique tensile strain hardening and multiple microcracking behaviors. The HPFRCC, which demonstrates remarkable properties such as strength, ductility, toughness, durability, stiffness, and thermal resistance, is a class of fiber cement composite with fine aggregates. It can withstand tensile stresses by forming distributed microcracks owing to the embedded fibers in the concrete, which improve the energy absorption capacity and apparent ductility. This high energy absorbing capacity can be enhanced furthe

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18

Startsev, O. V., M. P. Lebedev, and A. K. Kychkin. "Aging of Polymer Composites in Extremely Cold Climates." Izvestiya of Altai State University, no. 1(111) (March 6, 2020): 41–51. http://dx.doi.org/10.14258/izvasu(2020)1-06.

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A review of studies of effects of temperature, moisture, solar radiation, and other aggressive environmental factors on the properties of polymer composite materials are presented to substantiate the mechanism of their aging in extremely cold climates. It has been shown that composites develop internal stresses caused by unequal thermal expansion of reinforcing fibers and polymer matrices. These internal stresses cause the occurrence of microcracks, their coalescence, and formation of macro-damages in the bulk of the binder or at the interface with fibers. Fiberglass, carbon fiber, and other r

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19

Sato, N., and T. Kurauchi. "Detection of microcracking in manufacturing continuous fibre-reinforced aluminium composites by acoustic emission measurement." Journal of Materials Science Letters 11, no. 9 (1992): 598–600. http://dx.doi.org/10.1007/bf00728621.

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Iacocca, R. G., and D. J. Duquette. "The effects of matrix microcracking on the oxidation behaviour of carbon-fibre/glass-matrix composites." Journal of Materials Science 28, no. 17 (1993): 4749–61. http://dx.doi.org/10.1007/bf00414268.

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Siemes, H., D. Zilles, S. F. Cox, et al. "Preferred orientation of experimentally deformed pyrite measured by means of rieutron diffraction." Mineralogical Magazine 57, no. 386 (1993): 29–43. http://dx.doi.org/10.1180/minmag.1993.057.386.04.

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AbstractNeutron diffraction texture goniometry indicates that naturally deformed polycrystalline pyrite ores from Mt. Lyell (Tasmania) and Degtiarka (Ural Mountains) have weak lattice preferred orientations. During experimental deformation involving dislocation flow at elevated temperatures and pressures, these initial fabrics have been modified to produce new lattice preferred orientations.Polycrystalline pyrite form Mt. Lyell (B-1) has an initial <111> - fibre texture perpendicular to a grain-size layering. After 24% shortening perpendicular to the <111> - fibre axis at 700°C a n

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Zhang, Yixiang, Masahiko Miyauchi, and Steven Nutt. "Effects of thermal cycling on phenylethynyl-terminated PMDA-type asymmetric polyimide composites." High Performance Polymers 31, no. 7 (2018): 861–71. http://dx.doi.org/10.1177/0954008318804046.

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The effects of thermal cycling on a polymerized monomeric reactant (PMR) type polyimide (TriA X) reinforced with carbon fibers were investigated. Composite specimens were subjected to 2000 thermal cycles between −54°C and 232°C. At 400-cycle intervals, laminates were inspected for microcracks, and glass transition temperature ( T g) and short-beam shear (SBS) strength were measured. The composites did not exhibit microcracks after thermal cycling, although after 2000 thermal cycles, mechanical properties of the matrix declined slightly. The matrix degradation decreased the resistance to microc

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DEGHENHARD, C. C., B. V. SILVA, and F. PELISSER. "Experimental analysis of load capacity in beams with steel fiber reinforcement on the compression face." Revista IBRACON de Estruturas e Materiais 12, no. 1 (2019): 69–86. http://dx.doi.org/10.1590/s1983-41952019000100007.

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Abstract The use of steel fibers in the concrete is mainly aimed at increasing the post-peak toughness, due to the adhesion of the fibers to the cementitious matrix. However, there are several typologies of steel fibers, and the main differences are in the form (relation between length and diameter), fiber geometry, and the characterization between macrofibers and microfibers, which generally serve to reduce macrocracking and microcracking, respectively. In this context, this work evaluated the use of microfibers (20 kg/m³ or volume equal to 0.26% (Vf) of concrete volume), macrofibers (20 kg/m

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24

Luković, Mladena, Bartosz Budnik, Jelena Dragaš, Vedran Carević, and Ivan Ignjatović. "Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams." Gradjevinski materijali i konstrukcije 66, no. 3 (2023): 145–55. http://dx.doi.org/10.5937/grmk2300006l.

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Strain Hardening Cementitious Composite (SHCC) is an innovative type of fibre-reinforced cement-based composite that has superior tensile properties. Because of this, it holds the potential to enhance the shear capacity of reinforced concrete (RC) beams, if applied properly. This paper presents the general and distinctive properties of SHCC as well as a literature review of topics related to the contribution of SHCC layers to the shear resistance of RC beams with and without shear reinforcement. Based on the analysed results, it is concluded that the main characteristics of SHCC are its microc

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25

Islam, Mohammad S., Wenkai Chang, Zhao Sha, et al. "Mitigating cryogenic microcracking in carbon-fibre reinforced polymer composites using negative thermal-expansion nanoparticles functionalized by a polydopamine coating." Composites Part B: Engineering 257 (May 2023): 110676. http://dx.doi.org/10.1016/j.compositesb.2023.110676.

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Hussain, S., and J. S. Yadav. "A study on alkali resistant glass fibre concrete and its exposure to elevated temperatures." Journal of Achievements in Materials and Manufacturing Engineering 1, no. 103 (2020): 5–15. http://dx.doi.org/10.5604/01.3001.0014.6911.

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Purpose: Cement concrete is characterized as brittle in nature, the loading capacity of which is completely lost once failure is initiated. This characteristic, which limits the application of the material, can in one way be overcome by the addition of some small amount of short randomly distributed fibers (steel, glass, synthetic). Design/methodology/approach: The present study deals with the inclusion of alkali resistant glass fibers in concrete by percentage weight of cement. The mechanical properties such as compressive strength and split tensile strength have been studied after exposing t

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Tsuda, Hiroshi, Shigeo Mori, Michael C. Halbig, Mrityunjay Singh, and Rajiv Asthana. "Transmission Electron Microscopy of Interfaces in Diffusion-Bonded Silicon Carbide Ceramics." Advances in Science and Technology 88 (October 2014): 139–47. http://dx.doi.org/10.4028/www.scientific.net/ast.88.139.

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Diffusion bonding was used to join silicon carbide (SiC) to SiC substrates using three kinds of interlayers: physical-vapor-deposited (PVD) Ti coatings (10 and 20 μm) on the substrate, Ti foils (10 and 20 μm), and a Mo–B foil (25 μm). Two types of substrates were used: chemical-vapor-deposited SiC and SiC fiber bonded ceramic (SA-TyrannohexTM), the latter having a microstructure consisting of SiC fibers and a carbon layer. The microstructures of the phases formed during diffusion bonding were investigated using transmission electron microscopy (TEM) and selected-area diffraction analysis. TEM

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Du, Bai Song, Zhong Guo Ma, and Ling Luo. "Behavior of FRP Sandwich Panels under Synergistic Effects of Low Temperature and Cyclic Loading I: Experiment and Numerical Simulation Method." Advanced Materials Research 378-379 (October 2011): 102–7. http://dx.doi.org/10.4028/www.scientific.net/amr.378-379.102.

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The paper is concerned with using experiments and numerical simulations to study the mechanical performance of a Honeycomb Fiber-Reinforced Polymer (HFRP) sandwich panel at different temperatures, especially at low temperatures coupled with cyclic loadings. All physical tests were performed in a temperature controlled room and used a three-point bending setup where the applied load gradually increased from zero to 36kN. Experimental results show that the stiffness of the panel becomes softer at some lower temperatures. In order to eliminate the influence of the initial conditions, an increment

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Assaleh, Tarak A., and Lutfeya A. Almagguz. "Ultimate Elastic Wall Stress (UEWS) Test under Biaxial Loading for Glass-Fibre Reinforced Epoxy (GRE) Pipes." Advanced Materials Research 974 (June 2014): 188–94. http://dx.doi.org/10.4028/www.scientific.net/amr.974.188.

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This paper presents the results of an experimental investigation into the Ultimate Elastic Wall Stress (UEWS) of ±55° filament wound composite pipes. The UEWS test appears to provide an attractive alternative to the current method, and has proved to be one of the most effective in term of accuracy and speed. Moreover, it has been found to be sensitive to changes in key manufacturing and raw material parameters. The pipes were subjected to biaxial loading, which was achieved by combinations of hoop and axial stress. Loads were applied as groups of cycles which, were gradually increased until th

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Wu, Di, Laiwang Jing, Shaochi Peng, and Wei Jing. "A Study on the Mechanical Properties of Glass-Fiber-Reinforced Defective Gypsum Boards." Sustainability 16, no. 2 (2024): 821. http://dx.doi.org/10.3390/su16020821.

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As a waste derivative, glass fiber has drawn a lot of interest from the engineering community. The purpose of this study was to use glass fiber to improve the performance of defective gypsum boards. Single compression experiments, repeated loading experiments, and scanning electron microscopy (SEM) testing were performed on defective gypsum boards. The results showed that the addition of glass fiber can improve the compressive strength of defective gypsum boards. When the fiber concentration is 1.5%, the strength of single-hole gypsum boards increases by 77.1%. Energy evolution and residual st

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Barreira-Pinto, Rui, Rodrigo Carneiro, Mário Miranda, and Rui Miranda Guedes. "Polymer-Matrix Composites: Characterising the Impact of Environmental Factors on Their Lifetime." Materials 16, no. 11 (2023): 3913. http://dx.doi.org/10.3390/ma16113913.

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Polymer-matrix composites are widely used in engineering applications. Yet, environmental factors impact their macroscale fatigue and creep performances significantly, owing to several mechanisms acting at the microstructure level. Herein, we analyse the effects of water uptake that are responsible for swelling and, over time and in enough quantity, for hydrolysis. Seawater, due to a combination of high salinity and pressures, low temperature and biotic media present, also contributes to the acceleration of fatigue and creep damage. Similarly, other liquid corrosive agents penetrate into crack

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Triantis, Dimos, Ilias Stavrakas, Andronikos Loukidis, Ermioni D. Pasiou, and Stavros K. Kourkoulis. "Spatio-Temporal Distribution of the Sources of Acoustic Events in Notched Fiber-Reinforced Concrete Beams under Three-Point Bending." Materials 16, no. 14 (2023): 5118. http://dx.doi.org/10.3390/ma16145118.

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The acoustic activity, generated in notched, beam-shaped concrete specimens, loaded under three-point bending, is studied in terms of the position of the sources of acoustic events, and the frequency of their generation. Both plain specimens (without any internal reinforcement) and specimens reinforced with various types of short fibers were tested. The target of the study is to investigate the existence of indices that could be considered as pre-failure indicators of the upcoming fracture. In addition, an attempt is undertaken to classify the damage mechanisms activated to tensile or shear na

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Serdar, Marijana, Ana Baričević, Rukavina Marija Jelčić, Martina Pezer, Dubravka Bjegović, and Nina Štirmer. "Shrinkage Behaviour of Fibre Reinforced Concrete with Recycled Tyre Polymer Fibres." November 16, 2015. https://doi.org/10.1155/2015/145918.

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Different types of fibres are often used in concrete to prevent microcracking due to shrinkage, and polypropylene fibres are among the most often used ones. If not prevented, microcracks can lead to the development of larger cracks as drying shrinkage occurs, enabling penetration of aggressive substances from the environment and reducing durability of concrete structures. The hypothesis of the present research is that polypropylene fibres, used in concrete for controlling formation of microcracks due to shrinkage, can be replaced with recycled polymer fibres obtained from end-of-life tyres. To

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Hajiaghamemar, Mohammadreza, Davood Mostofinejad, and Hadi Bahmani. "High volume of slag and PP fibres in engineered cementitious composites (ECC): Microstructure and mechanical properties." Magazine of Concrete Research, December 14, 2022, 1–44. http://dx.doi.org/10.1680/jmacr.22.00128.

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The use of engineered cementitious composite (ECC) is increasing due to its high tensile strength and ductility, however, little attention has been paid to substitutes for its ingredients. Blast furnace slag instead of fly ash and polypropylene (PP) fibres instead of polyvinyl alcohol (PVA) fibres may be considered to be appropriate alternative substitutes. However, scanty research has examined the effect of using high levels of slag and PP fibres on the mechanical properties and microstructure of ECC. Therefore, the present study aimed to produce an engineered cementitious composite with a la

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Haruna, Sani, Musa Adamu, Yasser E. Ibrahim, et al. "Multifunctional engineered cementitious composites modified with nanomaterials and their applications: An overview." REVIEWS ON ADVANCED MATERIALS SCIENCE 62, no. 1 (2023). http://dx.doi.org/10.1515/rams-2022-0309.

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Abstract Due to their advantages such as high tensile strength, low cost of production, easy manufacturing methods, and ease of use, cementitious materials are extensively utilized in the construction industry. The applications of nanomaterials in cementitious materials have been found to enhance their properties. It allows molecular changes to improve the material behaviour and the performance of civil infrastructure structures, including buildings and highways. Owing to the high ductility of polyvinyl alcohol-engineered cementitious composites (ECCs), it was suggested to be used in steel-rei

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Huang, Feng, Wenkai Chang, Mohammad S. Islam, et al. "Microcracking Resistance of 3D Printed Fibre Composites at Cryogenic Temperatures." Additive Manufacturing, July 2024, 104307. http://dx.doi.org/10.1016/j.addma.2024.104307.

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Rutzen, Matthias, Philipp Lauff, Roland Niedermeier, et al. "Influence of fiber alignment on pseudoductility and microcracking in a cementitious carbon fiber composite material." Materials and Structures 54, no. 2 (2021). http://dx.doi.org/10.1617/s11527-021-01649-2.

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AbstractThis research examines the effect of fiber alignment on the performance of an exceptionally tough 3D-printable short carbon fiber reinforced cementitious composite material, the flexural strength of which can exceed 100 N/mm2. The material shows pseudoductility caused by strain-hardening and microcracking. An extrusion-based manufacturing process allows accurate control over the spatial alignment of the fibers’ orientation, since extrusion through a tight nozzle leads to nearly unidirectional alignment of the fibers with respect to the directional movement of the nozzle. Specimens were

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Breunig, T. M., S. R. Stock, J. H. Kinney, A. Guvenilir, and M. C. Nichols. "Impact of X-Ray Tomographic Microscopy on Deformation Studies of a SiC/Al MMC." MRS Proceedings 217 (1990). http://dx.doi.org/10.1557/proc-217-135.

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ABSTRACTDamage in a continuous, aligned-fiber SiC/Al metal matrix composite (MMC), e.g. fiber fracture, fiber-matrix interphase microcracking, intra-ply matrix voids and cracks, is examined with synchrotron x-ray tomographic microscopy (XTM). Quantitative three-dimensional measurements of damage are reported in as-fabricated and monotonically loaded SiC/Al. The XTM results indicate that increases in observed macroscopic structural stiffness during the first few fatigue cycles of an MMC coupon correspond to elimination of processing-related matrix porosity and to displacement of the fibers from

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"Detection of microcracking in manufacturing continuous fibre-reinforced aluminium composites by acoustic emission measurement." NDT & E International 30, no. 2 (1997): 114. http://dx.doi.org/10.1016/s0963-8695(97)85568-5.

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Abed, Suhad, Rafal Hadi, Akram Jawdhari, et al. "Influence of ternary hybrid fibers on the mechanical properties of ultrahigh-strength concrete." Frontiers in Materials 10 (February 23, 2023). http://dx.doi.org/10.3389/fmats.2023.1148589.

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Ultra-high performance concrete (UHPC), an advanced class of fiber-reinforced cementitious material with extraordinary mechanical properties, low permeability, shrinkage and creep, and high energy absorption capacity, has seen steady increase in use, with applications covering construction of new members and retrofit of existing ones. Fibers are added in the UHPC mix to bridge cracks, carry tensile stresses, and contribute greatly to member ductility and load capacity. Hybrid fibers comprising micro and macro types are beneficial where the first type resists microcracking and the second target

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Ducoulombier, Nicolas, Camille Chateau, Michel Bornert, et al. "X‐ray tomographic observations of microcracking patterns in fibre‐reinforced mortar during tension stiffening tests." Strain 56, no. 6 (2020). http://dx.doi.org/10.1111/str.12347.

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Cao, Kai, Ganggui Liu, Hui Li, and Zhiyi Huang. "Multiscale prediction of thermal damage for hybrid fibers reinforced cementitious composites blended with fly ash at high temperatures." International Journal of Damage Mechanics, February 26, 2024. http://dx.doi.org/10.1177/10567895241233866.

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Thermal damage assessment of cementitious composites is essential for evaluating post-fire health conditions of the engineering structures, as well as the basis for reinforcement and repair after fires. Fibers and fly ash are widely used in cementitious composites due to their excellent properties. However, quantifying and predicting the thermal damage of hybrid fibers reinforced cementitious composites blended with fly ash at high temperatures is still inexplicit. Hence, this study aims to realize multiscale prediction of thermal damage for hybrid fibers reinforced cementitious composites ble

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Wang, Jiawei, Wenkai Chang, Mohammad S. Islam, et al. "Toughening epoxy by nano-structured block copolymer to mitigate matrix microcracking of carbon fibre composites at cryogenic temperatures." Composites Science and Technology, March 2024, 110548. http://dx.doi.org/10.1016/j.compscitech.2024.110548.

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Wecluat, Methi, and Schboon Chimamphant. "Bond Strength Of Deformed Bars and Steel Fibers in High Strength Concrete." MRS Proceedings 114 (1987). http://dx.doi.org/10.1557/proc-114-245.

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ABSTRACTIn recent years, the means of making high strength concrete are simple by adding microsilica, fly ash, or other types of additives. As the use of high strength concrete increases, the need to clearly understand its prcperties is essentially a necessity for engineering design. While much of the basic properties of high strength concrete such as compressive strength (fc), modulus of elasticity (Ec), and modulus of rupture (fr), etc., has been investigated and reported recently, many remain unavailable. This paper presents the bond strength characteristics of deformed bar, steel fibers, a

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Werner, Michael J., and Ray J. King. "Moisture Measurement of Composites." MRS Proceedings 347 (1994). http://dx.doi.org/10.1557/proc-347-253.

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ABSTRACTOpen reflection microwave resonator sensors have been developed for in situ measurement of the bulk moisture absorbed by nonconducting fiber-reinforced composites. These contacting sensors operate at about 4 GHz, and have sensitivities and resolutions of about 0.1% moisture. In application, two independent parameters are measured simultaneously. From these, the two components of the effective complex dielectric constant ε* (ε′= - јε″) as seen by the sensor are determined. Both ε′ and ε″ are highly linear with absorbed moisture.Both linearly polarized sensors (for measuring anisotropie

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Khan, Qaiser uz Zaman, Muhammad Ali, Afaq Ahmad, Ali Raza, and Muhammad Iqbal. "Experimental and finite element analysis of hybrid fiber reinforced concrete two-way slabs at ultimate limit state." SN Applied Sciences 3, no. 1 (2021). http://dx.doi.org/10.1007/s42452-020-04078-y.

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AbstractConcrete is a brittle material that is weak in tension and is prone to internal microcracking. With the constant demand for improvement in concrete’s durability and mechanical proprieties, the use of fiber reinforcements has shown promising results. The findings of this paper are based on test results on hybrid fiber reinforced concrete (HFRC) samples of simply supported two-way slabs, produced with a selected volumetric proportion of steel fiber (SF) and polypropylene fibers (PPF). A total of twenty-one specimens were fabricated. Concrete slab specimens were tested under flexural load

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Scazzoli, Cecilia, Robin Trigueira, Amaël Cohades, and Véronique Michaud. "A Novel Method to Quantify Self-Healing Capabilities of Fiber-Reinforced Polymers." Frontiers in Materials 9 (July 18, 2022). http://dx.doi.org/10.3389/fmats.2022.932287.

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The present work investigates a novel and practical method to evaluate the healing efficiency of carbon-reinforced polymer composites. The method should be representative of damage occurring during the lifetime of a composite part, should tend to damage the healable matrix mostly and yet be simple and cost-effective to set up. Thus, the capacity to recover low-velocity impact damage has been evaluated via three-point bending flexural tests. Carbon-reinforced composite laminates were produced using HealTech™ T300-TW200-42RW-1250, a commercially healable resin pre-impregnated Torayca T300 3K twi

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Kirane, Kedar, Marco Salviato, and Zdeněk P. Bažant. "Microplane-Triad Model for Elastic and Fracturing Behavior of Woven Composites." Journal of Applied Mechanics 83, no. 4 (2016). http://dx.doi.org/10.1115/1.4032275.

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A multiscale model based on the framework of microplane theory is developed to predict the elastic and fracturing behavior of woven composites from the mesoscale properties of the constituents and the weave architecture. The effective yarn properties are obtained by means of a simplified mesomechanical model of the yarn, based on a mixed series and parallel coupling of the fibers and of the polymer within the yarns. As a novel concept, each of the several inclined or aligned segments of an undulating fill and warp yarn is represented by a triad of orthogonal microplanes, one of which is normal

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