Wyniki wyszukiwania - BazTech

1

Profesor Kazimierz Pawlak: Szkło jako materiał rzeźbiarski – tradycja, eksperymenty i nowe poszukiwania

Mróz Kamila

Świat Szkła

|

2025

|

R. 30, nr 3

43--46

2

Właściwości mechaniczne kompozytu wykonanego z rdzenia polistyrenowego pokrytego różną liczbą warstw włókien szklanych zatopionych w żywicy epoksydowej

Grzymski Filip, Karolak Anna, Niewiadomski Paweł

Przegląd Budowlany

|

2025

|

R. 96, nr 5

43--46

PL

Celem pracy była eksperymentalna ocena wytrzymałości na ściskanie i zginanie kompozytu z rdzenia polistyrenowego wzmocnionego różną liczbą warstw włókien szklanych w żywicy epoksydowej. Badania prowadzone z wykorzystaniem metody cyfrowej korelacji obrazu wykazały, że liczba zastosowanych warstw laminatu i jego lokalizacja w znaczący sposób wpływa na siłę niszczącą oraz mechanikę zniszczenia próbek ściskanych i zginanych. Zaproponowany kompozyt może być obiecującym materiałem budowlanym.

EN

The aim of this study was to experimentally evaluate the compressive and flexural strength of a composite consisting of a polystyrene core reinforced with varying numbers of glass fiber layers embedded in epoxy resin. Tests conducted using the digital image correlation method demonstrated that both the number of laminate layers and their placement significantly influence the ultimate load-bearing capacity and failure mechanics of the specimens. The proposed composite material may be promising as a potential structural solution in the construction industry.

3

Hybrid polymer materials with substantially improved mechanical properties

Sanocki Tadeusz, Sanocki Marek, Sanocka-Zajdel Agnieszka, Majcherczyk Henryk, Zajdel Magdalena, Bulanda Katarzyna, Oliwa Rafał, Oleksy Mariusz, Budzik Grzegorz, Stącel Monika

Polimery

|

2025

|

Vol. 70, nr 3

194--203

EN

The results of the research project POIR.01.01.01-00-0760/18 implemented from the funds of the Smart Growth Operational Program in the years 2014-2020 entitled “Development of a new technology for manufacturing details from polymer materials with significantly improved mechanical and visual properties” at Splast Ltd. were presented. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to assess the structure of the composites. The strongest interactions at the composite-coating interface were observed in the case of the use of varnish (interphase boundary width). The composites were characterized by gloss in the range of 32.6-448 GU, which classifies them as semi-gloss or glossy materials. SEM micrographs confirmed the correctness of the selection of materials, as evidenced by good fiber dispersion in the polymer matrix, while maintaining a characteristic round shape.

PL

Przedstawiono wyniki badań projektu POIR.01.01.01-00-0760/18 realizowanego ze środków Programu Operacyjnego Inteligentny Rozwój w latach 2014-2020 pt. „Opracowanie nowej technologii wytwarzania detali z materiałów polimerowych o znacząco poprawionych właściwościach mechanicznych i wizualnych” w Splast Sp. z o.o. Do oceny struktury kompozytów użyto mikroskopię sił atomowych (AFM) i skaningową mikroskopię elektronową (SEM). Najsilniejsze oddziaływania na granicy faz kompozyt-powłoka zaobserwowano w przypadku zastosowania powłoki lakierniczej (szerokość granicy międzyfazowej). Kompozyty charakteryzowały się połyskiem w zakresie 32,6-448 GU, co klasyfikuje je jako materiały z półpołyskiem lub połyskiem. Mikrofotografie SEM potwierdziły poprawność doboru materiałów, o czym świadczy dobra dyspersja włókna w osnowie polimerowej, przy zachowaniu charakterystycznego okrągłego kształtu.

4

Energy-efficient propeller-driven climbing robot design based on glass-fiber reinforced polymer

Abouhussein Omar Abdelaziz, Fouly Ahmed

Polimery

|

2025

|

Vol. 70, nr 7-8

455--466

EN

Three techniques were investigated to optimize the performance of a propeller-driven climbing robot: i) materials optimization using glass fiber reinforced polymer (GFRP) laminates with three distinct configurations - symmetric cross-layer (0°/90°), antisymmetric cross-layer (0°/90°), and antisymmetric angle-layer (±45°), ii) optimization of the robot chassis structural topology using density-based methods, and iii) laminate thickness (0.5-3.0 mm) and fiber content (50-70 v%). Optimal performance was achieved for an antisymmetric angle-layer configuration of 2.2 mm with 60 v% fiber content, resulting in a weight reduction (6.8%). Combined with a topologically optimized chassis design (20.1% weight reduction), the entire system achieves a 23.5% weight reduction, which translates into energy savings (23.6% torque reduction and 17.3% thrust reduction) while maintaining structural integrity. These results set a new standard for energy-efficient climbing robot designs, thanks to the synergistic optimization of materials and structures.

PL

Z badano trzy techniki w celu optymalizacji wydajności napędzanego śmigłem robota wspinaczkowego: i) optymalizacja materiałów przy użyciu laminatów na bazie wzmocnionego włóknem szklanym polimeru (GFRP) o trzech konfiguracjach - symetrycznej warstwie poprzecznej (0°/90°), antysymetrycznej warstwie poprzecznej (0°/90°) i antysymetrycznej warstwie kątowej (±45°), ii) optymalizacja topologii strukturalnej podwozia robota przy użyciu metod opartych na gęstości oraz iii) grubości laminatu (0,5-3,0 mm) i zawartości włókien (50-70 v%). Optymalną wydajność uzyskano dla antysymetrycznej konfiguracji warstwy kątowej 2,2 mm z zawartością włókien 60 v%, co skutkowało redukcją masy (6,8%). W połączeniu z topologicznie zoptymalizowaną konstrukcją podwozia (redukcja masy o 20,1%) cały system osiągnął 23,5% redukcję masy, co przekłada się na oszczędność energii (redukcja momentu obrotowego o 23,6% i redukcja ciągu o 17,3%) przy zachowaniu integralności struktury. Wyniki te wyznaczają nowy standard w dziedzinie energooszczędnych konstrukcji robotów wspinaczkowych, dzięki synergicznej optymalizacji materiałów i konstrukcji.

5

Examination of energy damping behavior of fiberglass reinforced sandwich structures with extruded polystyrene core material

Yavuz Ibrahim, Şenol Barış, Şimşir Ercan

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2025

|

Vol. 73, nr 3

art. no. e153430

EN

Composite materials are defined as new materials formed by combining two or more materials that do not mix, leveraging the best properties of each constituent. Composite materials are used in important industrial sectors such as aerospace and automotive due to their superior properties. In this study, XPS (extruded polystyrene) polymer foam was utilized as the core material. Glass fibers were combined with resin in a total of eight and twelve layers and applied to both the top and bottom of the core structure. Production involved both manual laying and vacuum bagging methods. Two types of glass fiber, weighing 200 g/m2 and 300 g/m2 , were employed. After production, the composites were cut to standardized dimensions, followed by three-point bending and low-speed impact tests. Impact experiments were conducted with a constant energy of 50 J. Results showed that the 200 g/m2 glass fiber composites experienced perforation in the eight-layer samples and rebound in the twelve-layer samples. Although greater deformation was observed in the impact tests of the 300 g/m2 glass fiber composites in the eight-layer samples compared to the twelve-layer samples, a rebound occurred in both. In three-point bending tests, the bending strength increased as the number of layers increased, and at the same number of layers, composites with 300 g/m2 properties showed higher strength than 200 g/m2 composites.

6

Performance evaluation of hot mix asphalt (HMA) using glass fiber as a partial replacement of fine aggregate

Sofri Liyana Ahmad, Daud Nurul Hanisah, Abdullah Mohd Mustafa Al Bakri, Mansor Ahmad Faizal, Rahim Nur Liza, Pietrusiewicz Paweł

Archives of Civil Engineering

|

2025

|

Vol. 71, nr 1

403--413

EN

Hot Mix Asphalt mixtures are often used as the top layer of pavement structures to build roads worldwide. Hot Mix Asphalt (HMA) mixtures combine bitumen and aggregate to produce roads. This paper aims to determine the optimum bitumen content (OBC) and investigate combining glass fiber in HMA with replacing a partial glass fiber of fine aggregate by Marshall Stability. The Hot Mix Asphalt was produced by mixing aggregate with 4% to 6% bitumen to obtain OBC to use in Hot Mix Asphalt Modified with glass fiber. Meanwhile, HMA modification was produced by mixing aggregate and OBC bitumen with 1% to 6% replacement glass fiber as a partial fine aggregate to improve the properties of Hot Mix Asphalt (HMA). Marshall Stability test, Aggregate Impact Value (AIV), Aggregate Crushing Value (ACV), Penetration Point, and Softening Point test was conducted. The effects of glass fiber in terms of stability, flow, stiffness, void in the total mix and void-filled bitumen in Marshall stability are investigated and compared with the control sample. The Optimum Bitumen Content (OBC) using Marshall Stability was chosen at 4.7% as OBC due highest stability value and passed in requirement standard JKR 2008. After analysis, the stability obtained for HMA Modified showed that adding 1%, 2%, and 3% glass fibers contributed to the highest stability values and passed the standards of parameters required by JKR 2008. Therefore, this paper can be concluded that the presence of glass fibers can significantly improve the performance of Hot Mix Asphalt (HMA).

7

Porównanie ugięcia betonowych belek zbrojonych prętami GFRP, BFRP i ze stali B500

Pytlowany Tomasz, Leń Dariusz, Piszczek Kazimierz, Zimka Roman

Przegląd Budowlany

|

2024

|

R. 95, nr 1-2

77--80

PL

Głównym celem badań było uzyskanie danych związanych z jakościową oceną sztywności belek betonowych zbrojonych prętami stalowymi EPSTAL B500SP oraz kompozytowymi prętami zbrojeniowymi GFRP i BFRP przy zachowaniu tego samego stopnia zbrojenia belek. Przyjęto schemat statyczny badanych elementów w postaci belki swobodnie podpartej o rozpiętości 1,5 m. Podstawowym opisem zachowania badanych elementów, zarejestrowanym podczas badań, była ścieżka równowagi statycznej opisana w układzie współrzędnych: siła obciążająca P i ugięcie belki u, rejestrowane za pomocą czujników, zarejestrowane zależności P-u. Podane na wykresach wartości ugięcia belek u są średnią arytmetyczną pomiarów z czujników przemieszczenia. W trakcie badań wykonano również pomiary odkształceń prętów zbrojeniowych w zależności od wartości przyłożonego obciążenia P. Wyniki tych pomiarów przedstawiono graficznie.

EN

The main purpose of the research was to obtain data related to the qualitative assessment of the stiffness of concrete beams reinforced with B500SP EPSTAL steel reinforcement bars and GFRP and BFRP composite reinforcing bars while maintaining the same degree of reinforcement of the beams. A static scheme of the tested elements was adopted in the form of a simply supported beam with a span of 1,5 m. The basic description of the behavior of the tested elements, recorded during the tests, was the static equilibrium path described in the coordinate system: loading force P and beam deflection u, recorded using sensors, the recorded P-u dependencies. The deflection values of the beams u given in the graphs are the arithmetic mean of the measurements from the displacement sensors. During the tests, measurements of reinforcing bars deformation were also carried out depending on the value of the applied load P. The results of these measurements are presented graphically.

8

Mechanical properties of glass fiber-reinforced backfills under different proportion conditions

Zhao Kang, Yang Jian, Zhong Juncheng, Yan Yajing, Tian Xiangqin, Feng Yincheng

Archives of Civil and Mechanical Engineering

|

2024

|

Vol. 24, no. 3

art. no. e196, 2024

EN

To investigate the mechanical properties of glass fiber-reinforced backfills under different proportion conditions, uniaxial compression tests were conducted on glass fiber-reinforced backfills with different slurry concentrations (65%, 68%, and 72%) and different cement–tailings ratios (1:6, 1:8, and 1:10). The effects of slurry concentration and cement–tailings ratio on the mechanical performance parameters, failure modes, and energy evolution of the glass fiber-reinforced backfills were discussed, and the effect mechanism of glass fiber on the overall mechanical properties of the backfills was revealed from a microscopic perspective. The results show that the slurry concentration and cement–tailings ratio have significant effects on the elastic modulus and uniaxial compressive strength of the glass fiber-reinforced backfill. The strength of the backfill reaches a maximum value of 2.831 MPa at a slurry concentration of 72% and a cement–tailings ratio of 1:6. The damage of the glass fiber-reinforced backfill under different proportion conditions first appeared in the central low-strength zone, and then gradually extended to the two ends, eventually leading to the overall failure. As the axial strain increases, the total and dissipated energies of glass fiber-reinforced backfill specimens increase as an exponential function, and the elastic energy increases and then decreases with the peak strain as the node. The bond between the glass fiber and the mortar matrix interface allows the fibers across both sides of the crack to form an “anchoring” effect, thus improving the overall properties of the backfill. The results of the study can promote the application and exploration of glass fiber-reinforced backfills in mine filling and provide some reference for improving the backfill performance.

9

Experimental and numerical investigations of 3D‑printed Onyx parts reinforced with continuous glass fibers

Nikiema Daouda, Balland Pascale, Sergent Alain

Archives of Civil and Mechanical Engineering

|

2024

|

Vol. 24, no. 2

art. no. e50, 2024

EN

The efficient modeling of 3D-printed parts, especially long fiber-reinforced composite parts, is a significant concern. This paper discusses finite-element modeling using the embedded element technique to simulate the mechanical behavior of specimens reinforced with long glass fibers. The study considered the concentric deposition mode of the fibers, the walls, and the solid filling pattern of the printed parts as parameters. In addition, classical numerical modeling of the composites using 2D Shell elements and an analytical prediction of the Young’s modulus using the rule of mixtures were implemented. The results showed that both the classical 2D Shell modeling and the law of mixtures predict the Young’s modulus with acceptable prediction error. However, these approaches have limitations in predicting the overall behavior of the specimens. The use of the embedded element technique allowed for the prediction of both the Young’s modulus and the global behavior of the specimens with acceptable prediction error.

10

CNT-woven glass fiber laminated composite for folded plate application: 2D-GDQ and experimental study

Heidari-Soureshjan Ali, Asadi Esmail, Talebitooti Roohollah

Archives of Civil and Mechanical Engineering

|

2024

|

Vol. 24, no. 3

art. no. e163, 2024

EN

The advantages of carbon nanotubes (CNTs) in fortifying the glass fiber reinforced polymeric (GFRP) composites are discussed in this paper. Bolted steel straps are utilized at the edges of composite plate to establish clamped conditions in the test setup. To minimize uncertainties caused by bolt attachments, a genetic algorithm-based model updating approach has been implemented by introducing artificial linear springs at the margins to achieve a better balance between theory and reality. The accuracy of the plate's results (natural frequencies and mode shapes) is verified, and the mechanical properties of randomly dispersed CNTs are incorporated in the formulations of folded plates. Remarkably, the motion equations are brought forward by the first order shear deformation theory (FSDT). Thereafter, two-directional generalized differential quadrature (2D-GDQ) technique is employed to determine natural frequencies from available motion, continuity, and boundary equations. The results of the folded plate are validated first by an experimental modal testing and finally some effective parameters such as folding angle, CNT weight ratio, boundary condition and flange-shape length are examined.

11

Odporność systemów ociepleń ETICS na uszkodzenia mechaniczne

Pogorzelec Paweł

Izolacje

|

2023

|

T. 28, nr 9

126, 128--137

PL

Przedmiotem artykułu jest odporność systemów ociepleń ETICS na uszkodzenia mechaniczne. Autor przedstawia sposób wytwarzania i właściwości siatek zbrojących z włókna szklanego do systemów ETICS, a także omawia formalne warunki dopuszczenia siatek zbrojących do zastosowania w systemach ETICS, sposoby zwiększania odporności systemów ociepleń na uderzenia oraz miejsca zastosowania podwójnego zbrojenia w systemach ETICS.

EN

The subject of the article is the resistance of ETICS thermal insulation systems to mechanical damage. The author presents the method of manufacturing and properties of fibreglass mesh for ETICS systems, and he also discusses the formal conditions for admitting reinforcing mesh to be used in ETICS systems, methods of increasing the impact resistance of thermal insulation systems and places to use double reinforcement in ETICS systems.

12

Comparative study on the impact transition behaviour of PPS reinforces with 40% VF Glass

Kadhim Rand Fadhil, Jassim Noor Alhuda Sabah, Abdulhasan Maryam Jawad

Diagnostyka

|

2023

|

Vol. 24, No. 3

art. no. 2023314

EN

Composite materials, in most cases polymers reinforced with fibers, are these days utilized in numerous applications such as aerospace applications in which lightweight, high strength, high specific modulus and low temperature resistance are critical issues. As these materials have possible applications in different designing areas, a lot of work has been put into enhancing their performance. This study's aim was to study the impact transition behavior of PPS and its composite under different ranges of temperatures by investigating their thermal, mechanical and structural characteristics. PPS and its composite reinforced with 40% vf (volume fraction) glass fibers are employed in this study. The impact transition behavior of PPS and 40%Vf glass fibers composite were investigated by analyzing the mechanical properties: impact, tensile, bending and, hardness at the following temperature ranges: 23°C, -26°C, and -78°C. A particular refrigerator and dry ice were used to achieve the extremely low temperatures (-26 C and -78 C, respectively). The results showed that the addition of 40% glass fibers improved the impact transition behavior of 40%GF PPS composite with temperature decreasing. Which with decreasing in temperature from 23˚C to -78˚C, the impact strength of PPS decreased by fifty five percent while it increased by twenty three percent for 40%GF PPS composite.

13

Effect of alkaline treatment on mechanical properties of palmyra and S-glass fiber reinforced epoxy nanocomposites

Sravya Navuluri Padma, Sivaganesan S., Venkatesh R., Manikandan R.

Archives of Civil and Mechanical Engineering

|

2023

|

Vol. 23, no. 2

art. no. e116, 2023

EN

Although epoxy resins have many advantages, their use needs to be expanded by improving their mechanical properties, including a wide variety of material quality, easy processing, negligible shrinkage due to curing, and good adhesiveness to many forms of fiber materials. The research focuses cost-effective utilization of palmyra fiber treated with 5% alkali solution and different volume percentages of S-glass fiberglass incorporated by epoxy resin developed by hand layup technique. The final epoxy hybrid composite consists of different weight ratios of palmyra/S-glass fiberglass as 25:75, 50:50, and 75:25. Influences of palmyra (treated) fiber dispersion quality on density, voids, mechanical and moisture absorption performance of the epoxy hybrid composite is studied by ASTM rule. The elevated output characteristics performance is compared with untreated fiber composite. Based on the rule of mixture, composite density is varied and Archimedes’ principle measures voids. The alkali treated composite samples showed good tensile stress, flexural and impact strength. While compared to untreated fiber composite, the tensile, flexural, and compressive strength of TPF/GF(25:75) composite was improved by 19.58%, 29%, and 14.3%, respectively. The reduced water absorption behaviour was observed on the treated composites. The effect of fiber dispersion on the mechanical failure of hybrid composite is studied by SEM analysis.

14

Zastosowanie betonu zbrojonego włóknami szklanymi do tworzenia elementów konstrukcyjnych oraz form architektonicznych

Blazy Julia, Drobiec Łukasz, Blazy Rafał

Przegląd Budowlany

|

2022

|

R. 93, nr 5-6

27--33

PL

W artykule opisano obszary zastosowań fibrobetonów z włóknami szklanymi oraz podkreślono możliwość tworzenia nie tylko elementów konstrukcyjnych przeznaczonych głównie do przenoszenia obciążeń, ale także struktur towarzyszących procesom budowlanym oraz form małej architektury, które uatrakcyjniają i urozmaicają przestrzenie publiczne. Dzięki ulepszonym właściwościom mechanicznym, zmniejszonym ciężarze i większej swobodzie projektowej elementów z włóknami szklanymi możliwe jest tworzenie wytrzymalszych, bezpieczniejszych, trwalszych oraz nowocześniejszych konstrukcji.

EN

The article describes the areas of application of glass fiber reinforced concrete and emphasizes the possibility of creating not only structural elements intended mainly for carrying loads but also structures accompanying construction processes and forms of small architecture that make public spaces more attractive and diversified. Thanks to improved mechanical properties, reduced weight, and greater design freedom of elements with glass fibers, it is possible to create stronger, safer, more durable, and modern structures.

15

Mechanical and thermal properties of cotton-bamboo fabric/glass fiber epoxy composites

Chandrasekaran Kailasam, Shanmugam Periyasamy, Senthilkumar Palanisamy

Polimery

|

2022

|

Vol. 67, nr 11-12

567--574

EN

Five-layer epoxy composites consisting of two outer layers made of glass fiber and three inner layers of cotton-bamboo fabric were obtained by compression molding. The influence of cotton-bamboo fabric/glass fiber content (35, 40, 45 and 50 wt%) and the order of stacking laminate layers on the mechanical properties (tensile, flexural, compressive, impact strength), thermal properties (TGA) and structure (FTIR, SEM) of the composites was investigated. The best mechanical and thermal properties were obtained with the content of 45 wt% cotton-bamboo fabric/glass fiber.

PL

Metodą prasowania tłocznego otrzymano pięciowarstwowe kompozyty epoksydowe składające się z dwóch warstw zewnętrznych wykonanych z włókna szklanego oraz trzech wewnętrznych z tkaniny bawełniano-bambusowej. Zbadano wpływ zawartości włókna szklanego (35, 40, 45 i 50% mas) oraz kolejności układania warstw laminatu na właściwości mechaniczne (wytrzymałość na rozciąganie, zginanie i ściskanie oraz udarność), termiczne (TGA) oraz strukturę (FTIR, SEM) kompozytów. Najlepsze właściwości mechaniczne i termiczne uzyskano przy zawartości 45% mas. włókna szklanego.

16

Influence of chemical foaming on the structure and selected properties of glass fiber reinforced PA6

Konczal Natalia, Nowinka Bartosz, Bieliński Marek

Polimery

|

2022

|

Vol. 67, nr 10

475--482

EN

The effect of the chemical foaming on the structure (SEM) and selected properties of glass fi ber (30, 60 wt%) reinforced polyamide 6 (PA 6) was investigated. Density, tensile properties and Charpy impact strength were determined. Hydrocerol ITP 825 was used as a blowing agent in the amount of 2 wt%. The size of the pores and the foaming degree depended on the distance from the injection point. The smallest pore size (64 μm) was observed for 60 wt% glass fiber reinforced PA6.

PL

Zbadano wpływ procesu spieniania chemicznego na strukturę (SEM) oraz wybrane właściwości poliamidu 6 wzmocnionego włóknem szklanym (30, 60 % mas.). Oznaczono gęstość, właściwości mechaniczne przy rozciąganiu i udarność Charpy’ego. Jako porofor stosowano Hydrocerol ITP 825 w ilości 2% mas. Wielkość porów i stopień spieniania zależały od odległości od punku wtryskiwania. Najmniejszą wielkość porów (64 μm) stwierdzono w przypadku poliamidu zawierającego 60% mas. włókna szklanego.

17

Zbrojenie kompozytowe z włókien szklanych - potencjalne źródło problemów inżynierskich

Błyszko Jarosław

Inżynieria i Budownictwo

|

2022

|

R. 78, nr 3-4

128--131

PL

W artykule omówiono zastosowanie prętów kompozytowych z włókna szklanego jako alternatywnego sposobu zbrojenia elementów zginanych. Przedstawiono koncepcję zbrojenia minimalnego wyliczanego na podstawie układu sił w przekroju zginanym, a następnie porównano z wynikami badań. Wykazano, że w przypadku zbrojenia GFRP opieranie się jedynie na zależnościach statycznych może prowadzić do zaniżenia nośności.

EN

This paper presents the use of fiberglass composite bars as an alternative reinforcement method for flexural elements. The concept of the minimal reinforcement calculated from the balance of forces in the element is presented and then compared with test results. It is shown that when calculating the minimum degree of GFRP reinforcement, basing only on static relationships can result in too low a load capacity.

18

Investigation of glass fiber influence on mechanical characteristics of natural fiber reinforced poliester composites : an experimental and numerical approach

Mohapatra Deepak Kumar, Deo Chitta Ranjan, Mishra Punyapriya

Composites Theory and Practice

|

2022

|

R. 22, nr 3

123--129

EN

In the past few decades, natural fiber reinforced polymeric composites have gained significant importance for various structural applications in different sectors like the automotive, aerospace, sports and building construction industries. However, hybridizations make the composite more versatile in term of strength, weight and its processing for many engineering applications. In the current study, a polyester resin matrix was reinforced with two different natural fibers, namely kenaf and palmyra palm leaf stalk (PPLS) and hybridized with glass fiber. Four layers of two different fiber mats, kenaf/glass and PPLS/glass with different stacking sequences were employed to fabricated laminates by the hand lay-up technique. In this case, an attempt was made using the numerical approach to investigate the influence of glass fiber on the mechanical characteristics of the laminates. To substantiate the results of the numerical approach, experiments were conducted. Enhancement of both the tensile and flexural strength was observed due to hybridization of both the kenaf and PPLS fiber with glass fiber. The tensile and flexural strength improved by 68.91 and 37.63% respectively when the kenaf fiber was hybridized with glass fiber. Similarly, enhancement of 54.42% of the tensile strength and 15.92% of the flexural strength were noticed when the PPLS fiber was hybridized with glass fiber. Through the use of ANSYS software, finite element analysis (FEA) was employed as a simulation method to examine the tensile and flexural strength. The numerical findings were found to be quite close to the experimental results, with a variation of less than 3%.

19

Polimerobeton zbrojony krótkimi włóknami szklanymi, z dodatkiem odpadowego szkła kineskopowego

Smoleń Jakub, Tomaszewska Klaudia, Junak Grzegorz, Kozioł Mateusz

Cement Wapno Beton

|

2022

|

R. 27, nr 2

102--114

PL

W pracy omówiono wykorzystanie odpadowego szkła kineskopowego, do wytwarzania polimerobetonów. Szkło kineskopowe poddano kilkakrotnemu rozdrabnianiu, w celu otrzymania ziaren mniejszych od 2 mm. Utworzono szereg polimerobetonów wzmocnionych hybrydowo: zmielonym szkłem kineskopowym, piaskiem oraz pociętym włóknem szklanym, o długości 4,5 mm i 12 mm. Zbadano wpływ dodatku włókien szklanych i ich długości na właściwości polimerobetonów, z 30% dodatkiem objętościowym żywicy epoksydowej, pełniącej rolę lepiszcza. Przeprowadzono badania szkła kineskopowego, oznaczając jego skład chemiczny, rozkład wielkości cząstek i budowę ziaren. Oznaczono wytrzymałość na zginanie i na ściskanie oraz porowatość otwartą, gęstość pozorną i nasiąkliwość wodą. Wyniki badań wykazały, że polimerobetony z dodatkiem zmielonego szkła kineskopowego, są dobrą metodą na zagospodarowanie, tego nietypowego odpadu. Uzyskane polimerobetony mają kilkukrotnie lepsze właściwości mechaniczne niż tradycyjne betony oraz znacznie mniejszą porowatość i nasiąkliwość wodą, co czyni ten materiał korzystny do produkcji wyrobów cienkościennych oraz narażonych na działanie wody i odczynników chemicznych. Dodatek ciętych włókien szklanych powoduje poprawę właściwości mechanicznych polimerobetonów, a także chroni ten materiał, przed gwałtowną dezintegracją, po przekroczeniu maksymalnych naprężeń. Jest to niezwykle ważne dla bezpieczeństwa użytkowania konstrukcji, w przypadku awarii.

EN

This paper describes the use of CRT glass waste for the production of polymer concrete. The CRT glass was subjected to a multistage mechanical disintegration process, in a way that allowed obtaining grains smaller than 2 mm. A set of hybrid reinforced polymer concrete was produced by using: ground CRT glass, sand and cut glass fibers 4.5 mm and 12 mm long. The influence of the volume of fibers and the length of glass fibers on the properties of polymer concrete with 30% by volume of epoxy resin, acting as a binder was described. Tests of CRT glass were carried out, among others study of chemical composition, particle size distribution and analysis of grain morphology. For polymer concrete, the flexural strength and compressive strength were determined, and the open porosity, apparent density, and water absorption were examined. The test results showed that polymer concrete with the use of milled CRT glass is a good way to manage this problematic waste. The polymer concrete has several times better than traditional concretes and significantly lower porosity and water absorption, which makes this material advantageous in applications such as the production of thin-walled products and products exposed to water and chemical attack. The addition of chopped glass fibers leads to an increase in mechanical properties and also protects the material against rapid disintegration after exceeding the maximum stresses, which is extremely important for the safety of use of the structure in the event of a failure.

20

Bending Failure Behavior of the Glass Fiber Reinforced Composite I-Beams Formed by a Novel Bending Pultrusion Processing Technique

Zhu Lvtao, Cao Shengbin, Zhang Xiaofeng, Li Lei

Autex Research Journal

|

2022

|

Vol. 22, no. 2

172--176

EN

The glass fiber reinforced resin matrix composite I-beams were designed and formed via a type of novel bending pultrusion processing technique, and the three-point bending tests were carried out to analyze the mechanical bending performances. The obtained results show that the main failure mode of the composite I-beam under the bending load is the upper structure (top flange) cracks along the length direction of the fibers, and the cracks simultaneously propagate downwards in the vertical direction. The bifurcated cracks can be found at the junction area between the top flange and web. In addition, the main bending failure mechanism of the composite I-beam includes the matrix cracking, propagation of cracks, and final fracture failure. In particular, noting that when the crack reaches the I-shaped neck position, the lateral bifurcation occurs, and the resulting secondary cracks further extend in two directions, which leads to the serious damage between the top flange and web, and the ultimate fracture failure occurs.