Ablative test of composites with epoxy resin and expanded perlite

Krzyżak, Aneta; Kucharczyk, Wojciech; Gaska, Jacek; Szczepaniak, Robert

doi:10.1016/j.compstruct.2018.05.018

Cited by 25 publications

(17 citation statements)

References 20 publications

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“…[35][36][37]. In addition, polymer composites can be used for various parts of a vehicle body or, for example, gearbox housings [38][39][40][41]. Injection molding is the most extensively used process for manufacturing plastic gears.…”

Section: Geometry Of the Teeth Flanksmentioning

confidence: 99%

Comparison of Selected Parameters of a Planetary Gearbox with Involute and Convex–Concave Teeth Flank Profiles

et al. 2020

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This article presents a model of the geometry of teeth profiles based on the path of contact definition. The basic principles of the involute and convex–concave teeth profile generation are described. Due to the more difficult manufacturing of the convex–concave gear profile in comparison to the involute one, an application example was defined that suppressed this disadvantage, namely a planetary gearbox with plastic-injection-molded gears commonly used in vehicle back-view mirror positioners. The contact pressures and the slide ratios of the sun, planet, and ring gears with both teeth profile variants were observed and the differences between the calculated parameters are discussed.

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Section: Geometry Of the Teeth Flanksmentioning

confidence: 99%

Comparison of Selected Parameters of a Planetary Gearbox with Involute and Convex–Concave Teeth Flank Profiles

et al. 2020

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“…Currently, the composites based on epoxy resin are regarded as most important material used in aviation, for structural elements [1][2][3][4][5][6][7][8][9], including aircraft skin [10,11]. In order to meet increasing expectations, more and more research is being conducted to modify the properties of the resin by adding fillers [12][13][14][15][16], including the increasingly popular nanofillers [17][18][19][20][21][22][23][24][25]. An important challenge for all technical applications of epoxy resin based com-posites, particularly aviation constructions, is the need to manufacture materials with significantly reduced flammability [26][27][28][29].…”

Section: Wpływ Wygrzewania Na Sieciowanie żYwicy Epoksydowej Przeznacmentioning

confidence: 99%

The effect of the heat treatment on the crosslinking of epoxy resin for aviation applications

Mucha¹,

Sterzyński

Krzyżak³

2020

Polimery

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We have investigated the MGS L285 epoxy laminating resin system, used in aviation applications. A number of tests were carried out, namely Dynamic Mechanical Analysis (DMA), Differential Scanning Calorimetry (DSC), tensile testing, three-point bending flexural testing, Charpy impact testing, Shore D hardness, density measurements and Fourier-Transform Infrared spectroscopy (FT-IR). Moreover, the tensile toughness U TT , the brittleness B and the linear isobaric thermal expansivity α L were calculated. The samples were subjected to heat treatment in the temperatures of 50, 60 and 80°C for 15 hours or were stored in room temperature. Glass transition temperature, hardness, density as well as other properties were observed to rise along with the increasing heat treatment temperature, suggesting the validity of applications of Voronoi-Delaunay structural analysis to polymer science. On the other hand, properties such as brittleness, toughness and impact strength exhibited a non-linear course of changes as a function of the heating temperature.

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“…The functional properties of polymeric materials, including mechanical properties and their experimental assessment have become an important area of research in the field of material engineering [1][2][3][4]. The growing interest is due to the increasing use of polymers in industrial production as well as medical devices [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Bending Behaviour of Polymeric Materials Used on Biomechanics Orthodontic Appliances

et al. 2020

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This paper discusses the issues of strength and creep of polymeric materials used in orthodontic appliances. Orthodontic biomechanics is focused on the movement of individual teeth or dental groups as a result of the force applied by orthodontic appliances. Stresses in the construction of functional and biomechanical appliances is generated when using the apparatus in the oral cavity. The orthodontic appliance must maintain its shape and not be damaged during treatment so strength and creep resistance are fundamental properties. It was assumed that the clinical success of orthodontic appliances can be determined by these performance properties. The aim of the work was the experimental assessment of comparative bending strength and creep resistance of selected popular polymer materials used in the production of biomechanical orthodontic appliances. Four commercial materials manufactured by the world class producers were tested: NextDent Ortho Rigid (Vertex-Dental B.V., Soesterberg, The Netherlands) marked as “1A”; Erkocryl (ERKODENT Erich Kopp GmbH, Pfalzgrafenweiler, Germany)-“2A”; Vertex Orthoplast (Vertex Dental B.V.), blue, marked as “3A” and material with the same name as “3A” but orange, marked in the article as “4A”. All the tests were carried out after aging in artificial saliva for 48 h at a temperature of 37 °C. Flexular strength and flexular modulus were made using the three point bending method according to the ISO 178 technical standard. Creep tests were carried out according to the method contained in ISO 899-2. The creep test was carried out in an artificial saliva bath at 37 °C. The creep tests showed significant differences in the strength, modulus and deformability of the tested materials. The strength reliability of the tested materials also varied. The research shows that the 2A material can be used for orthodontic applications in which long-term stresses should be lower than 20 MPa.

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Ablative test of composites with epoxy resin and expanded perlite

Cited by 25 publications

References 20 publications

Comparison of Selected Parameters of a Planetary Gearbox with Involute and Convex–Concave Teeth Flank Profiles

Comparison of Selected Parameters of a Planetary Gearbox with Involute and Convex–Concave Teeth Flank Profiles

The effect of the heat treatment on the crosslinking of epoxy resin for aviation applications

Bending Behaviour of Polymeric Materials Used on Biomechanics Orthodontic Appliances

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