Nikolai Glück - Academia.edu (original) (raw)

Papers by Nikolai Glück

Research paper thumbnail of Performance characteristics of protective coatings under low-temperature offshore conditions. Part 1: Experimental set-up and corrosion protection performance

Cold Regions Science and Technology, Jul 1, 2016

Six organic coating systems are investigated according to their performance under Arctic offshore... more Six organic coating systems are investigated according to their performance under Arctic offshore conditions. Four performance groups are considered: corrosion protection performance, performance under mechanical loads, surface status, and icing performance. The investigations involve the following tests: accelerated corrosion protection/ageing tests, tests for coating adhesion, hoarfrost accretion measurements, impact resistance tests, abrasion tests, and wettability tests. The test conditions are adapted to Arctic offshore conditions, which mainly cover low temperatures down to − 60°C. A testing facility for hoarfrost performance tests is developed. The coating systems are organic coating systems which differ in generic coating material, hardener, number of layers, dry film thickness and application method. Part 2 discusses the results of surface topography measurements, wettability assessment, hoarfrost formation and mechanical testing. A procedure for the ranking of the coating performance is developed. The best performing system in the scope of evaluation is a three-layer system with high thickness (1400 µm), consisting of two glass-flake reinforced epoxy coats and a polyurethane topcoat.

Research paper thumbnail of Fatigue Behavior and Climatic Cycle Testing of Large Bonded Attachments

ADHESION ADHESIVES&SEALANTS, Sep 1, 2018

FIGURE 6 Example for temperature cycles for the combined fatigue behavior and climatic change tes... more FIGURE 6 Example for temperature cycles for the combined fatigue behavior and climatic change testing (© Fraunhofer IGP

Research paper thumbnail of Fatigue behavior and climatic cycle testing of rotor blade components

Lightweight design worldwide, Jun 1, 2018

FIGURE 6 Example for temperature cycles for the combined fatigue behavior and climatic change tes... more FIGURE 6 Example for temperature cycles for the combined fatigue behavior and climatic change testing (© Fraunhofer IGP

Research paper thumbnail of Schwingfestigkeits- und Klimawechselprüfung von Rotorblattkomponenten

Lightweight design, Jun 1, 2018

Research paper thumbnail of Hot pressing of complex and near-net-shape 3-D components

Lightweight design worldwide, Feb 1, 2018

Research paper thumbnail of Investigation Into the Performance of a Dual-Layer Thin-Film Organic Coating During Accelerated Low-Temperature Offshore Testing

Journal of offshore mechanics and Arctic engineering, May 5, 2017

The application of thin-film coatings is a method to protect armatures, accessories, and control ... more The application of thin-film coatings is a method to protect armatures, accessories, and control elements on offshore facilities against corrosion and mechanical damages. The performance of a dual-layer thin-film (30 μm) coating system under simulated Arctic offshore exposure was investigated. The coating system consisted of polyamide-based primer and molybdenum-disulfide (MoS2)/polytetrafluoroethylene (PTFE)—modified topcoat. The investigations involved the following tests: accelerated corrosion protection/aging tests, coating adhesion tests, scanning electron microscopy (SEM)/energy-dispersive X-ray (EDX) inspections, static contact angle measurements, specific surface energy measurements, hoarfrost accretion, and abrasion resistance tests. The test conditions were adapted to Arctic offshore conditions. Effects of accelerated offshore aging on surface morphology, surface chemistry, and hoarfrost accretion were also investigated.

Research paper thumbnail of Influence of peroxide cross-linking temperature and time on mechanical, physical and thermal properties of polyethylene

MP MATERIALPRUEFUNG - MP MATERIALS TESTING, Feb 1, 2022

Polyethylene is a very common liner material for type IV pressure vessels due to its good toughne... more Polyethylene is a very common liner material for type IV pressure vessels due to its good toughness and easy processing. The property profile of the polymer can be improved by cross-linking thereby changing the nature of the polymer from thermoplastic toward more elastomeric. For this purpose, polyethylene is modified either chemically, using peroxide or silane, or physically by radiation. In the present work, a cross-linkable polyethylene grade that can be processed by rotational molding was peroxide cross-linked under variation of temperature and time. Subsequently, the material was characterized by differential scanning calorimetry, tensile tests, notched bar impact tests and permeation measurements. Two of the altogether six parameter combinations investigated did not lead to successful cross-linking resulting in very poor toughness. Stiffness, strength and permeation barrier properties, however, were much better than those of the other series due to higher crystallinity. Mechanical, physical and chemical properties changed significantly by successful cross-linking. The impact strength could be improved by a factor of more than 10. At the same time, significant losses in stiffness, strength and permeation barrier properties had to be accepted. Peroxide induced randomly distributed formation of cross-links above the melting point interfered with formation of crystalline regions upon cooling.

Research paper thumbnail of Abrasion testing of organic corrosion protection coating systems with a rotating abrasive rubber wheel

Wear, Feb 1, 2016

Abstract The abrasive wear performance of six organic offshore coating systems is investigated at... more Abstract The abrasive wear performance of six organic offshore coating systems is investigated at two temperature levels (0 °C and 20 °C) with a rotating wheel abrasion tester. The relationship between exposure time (in terms of number of revolutions) and coating thickness reduction follows a linear relationship: Δ h = C 1 · n R + C 2 . The reverse of the progress parameter (1/ C 1 ) is defined as abrasion resistance. This parameter is found to be sensitive to the testing temperature; it decreases for most of the coatings for the lower temperature. Combined SEM/EDX analyses reveal a number of material removal modes. The separation and pull-off of filler/pigment particles contribute notably to the material abrasion on all coating systems at the two temperature levels. Type, distribution and hardness of filler materials are important design parameters. A model of Bello and Wood (2005) [33] for filled polyamides is adapted and extended in order to systematically register different material removal modes. Image analysis is applied to quantify filler particle distribution and size.

Research paper thumbnail of Performance characteristics of protective coatings under low-temperature offshore conditions. Part 2: Surface status, hoarfrost accretion and mechanical properties

Cold Regions Science and Technology, Jul 1, 2016

Six organic coating systems are investigated according to their performance under Arctic offshore... more Six organic coating systems are investigated according to their performance under Arctic offshore conditions. Four performance groups are considered: corrosion protection performance, performance under mechanical loads, surface status, and icing performance. The investigations involve the following tests: accelerated corrosion protection/ageing tests, tests for coating adhesion, hoarfrost accretion measurements, impact resistance tests, abrasion tests, and wettability tests. The test conditions are adapted to Arctic offshore conditions, which mainly cover low temperatures down to − 60°C. A testing facility for hoarfrost performance tests is developed. The coating systems are organic coating systems which differ in generic coating material, hardener, number of layers, dry film thickness and application method. Part 2 discusses the results of surface topography measurements, wettability assessment, hoarfrost formation and mechanical testing. A procedure for the ranking of the coating performance is developed. The best performing system in the scope of evaluation is a three-layer system with high thickness (1400 µm), consisting of two glass-flake reinforced epoxy coats and a polyurethane topcoat.

Research paper thumbnail of Corrosion Protection Performance of Organic Offshore Coating Systems at −60 °C Temperature Shock

Journal of offshore mechanics and Arctic engineering, Jul 29, 2016

Six organic coating systems were investigated according to their corrosion protection performance... more Six organic coating systems were investigated according to their corrosion protection performance under simulated Arctic offshore conditions. The investigations involved accelerated aging, coating adhesion measurements, and dynamic mechanical analysis (DMA). The test conditions were adapted to Arctic offshore conditions, which mainly covered temperature shocks between −20 and −60 °C, chloride exposure, dry–wet cycles, and ultraviolet (UV) radiation. Corrosion protection capability dropped for all coatings if temperature decreased from −20 °C to −60 °C. Two types of coatings could be classified according to their response to the corrosive load: temperature-sensitive coatings and insensitive coatings. Adhesive effects (interface between coating system and substrate) were found to be marginal only at low temperatures and did not affect the response of the coatings to the corrosive load. Cohesive effects (mechanical properties of free polymer films) could be identified in terms of a very high storage modulus and changes in the loss modulus for a temperature-sensitive coating at −60 °C.

Research paper thumbnail of Nichtbrennbare, anorganische Faserverbundwerkstoffe für den Schiffbau

Lightweight design, Dec 1, 2019

Nichtbrennbare, anorganische Faserverbundwerkstoffe für den Schiffbau das Fraunhofer iGP und die ... more Nichtbrennbare, anorganische Faserverbundwerkstoffe für den Schiffbau das Fraunhofer iGP und die Tu clausthal entwickeln im Forschungsvorhaben anorKomp nichtbrennbare, anorganische Faserverbundwerkstoffe. diese ermöglichen dank der Ein stufung in die brandschutzklasse a1 die umsetzung von Leichtbaulösungen im äußerst streng reglementierten Schiffbau.

Research paper thumbnail of Untersuchung des Prozesses zum Unterwasserkleben von Halterungssystemen

Research paper thumbnail of Halterungen im Unterwasserbereich klebtechnisch fügen (Teil 1)

Adhäsion Kleben & Dichten, Jun 1, 2019

Wasser ist bislang noch nicht systematisch untersucht worden. Dennoch werden vereinzelt Klebstoff... more Wasser ist bislang noch nicht systematisch untersucht worden. Dennoch werden vereinzelt Klebstoffe unter Wasser eingesetzt, um temporäre Fügeverbindungen zu schaffen, etwa für Havarie-Abdichtungen oder Notreparaturen. Weitere Fügeszenarien im Unterwasserbereich erfordern hingegen stets eine Langzeitbeständigkeit der Verbindung. Hierfür bedarf es der Entwicklung eines zuverlässigen und robusten Verfahrens.

Research paper thumbnail of Incombustible, Inorganic Fiber-reinforced Composites for Shipbuilding

Lightweight design worldwide, Dec 1, 2019

Research paper thumbnail of Stranggelegte Leichtbautragstrukturen aus FVK*/Strand laid FRP lightweight structures

Werkstattstechnik (1997. Internet), 2015

<p>Mit verschiedenen Industriepartnern und dem Fraunhofer AGP wurde ein Fertigungsverfahren... more <p>Mit verschiedenen Industriepartnern und dem Fraunhofer AGP wurde ein Fertigungsverfahren zur Herstellung von Stabtragwerken aus faserverstärktem Kunststoff (FVK) entwickelt. Es erlaubt, beliebige Tragwerksstrukturen als ein integrales und besonders leichtes Bauteil direkt aus den Halbzeugen Roving und Matrixharz ressourceneffizient sowie kostengünstig herzustellen. Das Verfahren ist weitgehend automatisierbar. Zu den Produktbeispielen zählen unter anderem Masten, Brückenstrukturen und Rotorblätter von Windkraftanlagen. </p> <p>&amp;nbsp;</p> <p>Fraunhofer AGP has developed a process for manufacturing fibre-reinforced plastic (FRP) rod frameworks. The semi-finished products roving and resin are used to manufacture almost a random number of spatial structures as an integral and very lightweight component in a resource-efficient way at low cost. Large parts of the process can be automated. Product examples are masts, bridge structures and wind turbine blades.</p>

Research paper thumbnail of Heißpressen komplexer und endkonturnaher 3-D-Bauteile

Lightweight design, Feb 1, 2018

Research paper thumbnail of Mischbauweisen als Chance für die Klebtechnik

Adhäsion Kleben & Dichten, Aug 1, 2014

Research paper thumbnail of Manufacturing Principles for Z-Pin Reinforced FRP Composite Laminates in the Case of Bolted Joints

Lightweight design worldwide, Jun 1, 2017

Pre-loading of bolted FRP joints leads to creep and relaxation processes. Those effects are causi... more Pre-loading of bolted FRP joints leads to creep and relaxation processes. Those effects are causing a continuous pre-load loss. A newly developed production method allows a reduction of these effects by using thin CFRP pins. Those pins reinforce the composite laminate in thickness direction.

Research paper thumbnail of Fertigungstechnische Grundlagen zum Einsatz von Z-Pins beim Verschrauben von FVK-Bauteilen

Lightweight design, May 22, 2017

Research paper thumbnail of Eine wirtschaftliche Alternative zum Schweißen

Adhäsion Kleben & Dichten, Oct 1, 2015

Schiffe sind wie eine eigene kleine Stadt, in der Rohrleitungen für verschiedene Medien wie Frisc... more Schiffe sind wie eine eigene kleine Stadt, in der Rohrleitungen für verschiedene Medien wie Frisch-, Grauund Kühlwasser sowie Kraftstoff benötigt werden. Je nach Anwendungsfall variieren die Materialien und Abmessungen der auf Schiffen verbauten metallischen Rohrleitungen (Bild 1). Das derzeit überwiegend eingesetzte Verfahren zum Fügen von Rohrleitungen ist das Schweißen. Es stellt vor dem Auftrag von Korrosionsschutzbeschichtungen das optimale Fügeverfahren dar. Nach dem Beschichten ist das Schweißen jedoch mit einigen Problemen verbunden. Zum einen ist es nicht möglich, auf Korrosionsschutzbeschichtungen zu schweißen. Soll trotzdem geschweißt werden, erfordert dies ein vorheriges Entschichten. Zum anderen muss die beschichtete Umgebung vor den Einflüssen des Schweißens (Temperatureintrag, Funkenflug, Rauchgase, usw.) geschützt werden, um Beschichtungsschäden zu vermeiden, die Korrosionsprobleme zur Folge haben können. Der gesamte Prozess ist zeitund kostenintensiv. Hinzu kommt eine mangelnde Ressourceneffizienz aufgrund des wiederholten Beschichtens der geschweißten Verbindungen. Aus dieser Problematik entstand die Forderung nach einem wärmearmen Fügeverfahren für Rohrleitungen, das nach dem Beschichten angewendet werden kann. Da mechanische Lösungen wie Rohrkupplungen nicht wartungsfrei sind und Verfahren wie das Kaltlöten derzeit noch nicht problemlos anwendbar sind, wurde im Rahmen des von der Arbeitsgemeinschaft industrieller Forschungsvereinigungen „Otto von Guericke“ (AiF) geförderten Forschungsprojektes „Klebtechnisches Fügen von Rohrleitungen im Schiffbau“ eine klebtechnische Lösung entwickelt. Der erste Teil dieser vierteiligen Serie beschäftigt sich mit der Auswahl einer Oberflächenvorbehandlung sowie mit der Ermittlung thermischer Abminderungsfaktoren. Der Folgebeitrag in der Novemberausgabe wird auf die Fes-

Research paper thumbnail of Performance characteristics of protective coatings under low-temperature offshore conditions. Part 1: Experimental set-up and corrosion protection performance

Cold Regions Science and Technology, Jul 1, 2016

Six organic coating systems are investigated according to their performance under Arctic offshore... more Six organic coating systems are investigated according to their performance under Arctic offshore conditions. Four performance groups are considered: corrosion protection performance, performance under mechanical loads, surface status, and icing performance. The investigations involve the following tests: accelerated corrosion protection/ageing tests, tests for coating adhesion, hoarfrost accretion measurements, impact resistance tests, abrasion tests, and wettability tests. The test conditions are adapted to Arctic offshore conditions, which mainly cover low temperatures down to − 60°C. A testing facility for hoarfrost performance tests is developed. The coating systems are organic coating systems which differ in generic coating material, hardener, number of layers, dry film thickness and application method. Part 2 discusses the results of surface topography measurements, wettability assessment, hoarfrost formation and mechanical testing. A procedure for the ranking of the coating performance is developed. The best performing system in the scope of evaluation is a three-layer system with high thickness (1400 µm), consisting of two glass-flake reinforced epoxy coats and a polyurethane topcoat.

Research paper thumbnail of Fatigue Behavior and Climatic Cycle Testing of Large Bonded Attachments

ADHESION ADHESIVES&SEALANTS, Sep 1, 2018

FIGURE 6 Example for temperature cycles for the combined fatigue behavior and climatic change tes... more FIGURE 6 Example for temperature cycles for the combined fatigue behavior and climatic change testing (© Fraunhofer IGP

Research paper thumbnail of Fatigue behavior and climatic cycle testing of rotor blade components

Lightweight design worldwide, Jun 1, 2018

FIGURE 6 Example for temperature cycles for the combined fatigue behavior and climatic change tes... more FIGURE 6 Example for temperature cycles for the combined fatigue behavior and climatic change testing (© Fraunhofer IGP

Research paper thumbnail of Schwingfestigkeits- und Klimawechselprüfung von Rotorblattkomponenten

Lightweight design, Jun 1, 2018

Research paper thumbnail of Hot pressing of complex and near-net-shape 3-D components

Lightweight design worldwide, Feb 1, 2018

Research paper thumbnail of Investigation Into the Performance of a Dual-Layer Thin-Film Organic Coating During Accelerated Low-Temperature Offshore Testing

Journal of offshore mechanics and Arctic engineering, May 5, 2017

The application of thin-film coatings is a method to protect armatures, accessories, and control ... more The application of thin-film coatings is a method to protect armatures, accessories, and control elements on offshore facilities against corrosion and mechanical damages. The performance of a dual-layer thin-film (30 μm) coating system under simulated Arctic offshore exposure was investigated. The coating system consisted of polyamide-based primer and molybdenum-disulfide (MoS2)/polytetrafluoroethylene (PTFE)—modified topcoat. The investigations involved the following tests: accelerated corrosion protection/aging tests, coating adhesion tests, scanning electron microscopy (SEM)/energy-dispersive X-ray (EDX) inspections, static contact angle measurements, specific surface energy measurements, hoarfrost accretion, and abrasion resistance tests. The test conditions were adapted to Arctic offshore conditions. Effects of accelerated offshore aging on surface morphology, surface chemistry, and hoarfrost accretion were also investigated.

Research paper thumbnail of Influence of peroxide cross-linking temperature and time on mechanical, physical and thermal properties of polyethylene

MP MATERIALPRUEFUNG - MP MATERIALS TESTING, Feb 1, 2022

Polyethylene is a very common liner material for type IV pressure vessels due to its good toughne... more Polyethylene is a very common liner material for type IV pressure vessels due to its good toughness and easy processing. The property profile of the polymer can be improved by cross-linking thereby changing the nature of the polymer from thermoplastic toward more elastomeric. For this purpose, polyethylene is modified either chemically, using peroxide or silane, or physically by radiation. In the present work, a cross-linkable polyethylene grade that can be processed by rotational molding was peroxide cross-linked under variation of temperature and time. Subsequently, the material was characterized by differential scanning calorimetry, tensile tests, notched bar impact tests and permeation measurements. Two of the altogether six parameter combinations investigated did not lead to successful cross-linking resulting in very poor toughness. Stiffness, strength and permeation barrier properties, however, were much better than those of the other series due to higher crystallinity. Mechanical, physical and chemical properties changed significantly by successful cross-linking. The impact strength could be improved by a factor of more than 10. At the same time, significant losses in stiffness, strength and permeation barrier properties had to be accepted. Peroxide induced randomly distributed formation of cross-links above the melting point interfered with formation of crystalline regions upon cooling.

Research paper thumbnail of Abrasion testing of organic corrosion protection coating systems with a rotating abrasive rubber wheel

Wear, Feb 1, 2016

Abstract The abrasive wear performance of six organic offshore coating systems is investigated at... more Abstract The abrasive wear performance of six organic offshore coating systems is investigated at two temperature levels (0 °C and 20 °C) with a rotating wheel abrasion tester. The relationship between exposure time (in terms of number of revolutions) and coating thickness reduction follows a linear relationship: Δ h = C 1 · n R + C 2 . The reverse of the progress parameter (1/ C 1 ) is defined as abrasion resistance. This parameter is found to be sensitive to the testing temperature; it decreases for most of the coatings for the lower temperature. Combined SEM/EDX analyses reveal a number of material removal modes. The separation and pull-off of filler/pigment particles contribute notably to the material abrasion on all coating systems at the two temperature levels. Type, distribution and hardness of filler materials are important design parameters. A model of Bello and Wood (2005) [33] for filled polyamides is adapted and extended in order to systematically register different material removal modes. Image analysis is applied to quantify filler particle distribution and size.

Research paper thumbnail of Performance characteristics of protective coatings under low-temperature offshore conditions. Part 2: Surface status, hoarfrost accretion and mechanical properties

Cold Regions Science and Technology, Jul 1, 2016

Six organic coating systems are investigated according to their performance under Arctic offshore... more Six organic coating systems are investigated according to their performance under Arctic offshore conditions. Four performance groups are considered: corrosion protection performance, performance under mechanical loads, surface status, and icing performance. The investigations involve the following tests: accelerated corrosion protection/ageing tests, tests for coating adhesion, hoarfrost accretion measurements, impact resistance tests, abrasion tests, and wettability tests. The test conditions are adapted to Arctic offshore conditions, which mainly cover low temperatures down to − 60°C. A testing facility for hoarfrost performance tests is developed. The coating systems are organic coating systems which differ in generic coating material, hardener, number of layers, dry film thickness and application method. Part 2 discusses the results of surface topography measurements, wettability assessment, hoarfrost formation and mechanical testing. A procedure for the ranking of the coating performance is developed. The best performing system in the scope of evaluation is a three-layer system with high thickness (1400 µm), consisting of two glass-flake reinforced epoxy coats and a polyurethane topcoat.

Research paper thumbnail of Corrosion Protection Performance of Organic Offshore Coating Systems at −60 °C Temperature Shock

Journal of offshore mechanics and Arctic engineering, Jul 29, 2016

Six organic coating systems were investigated according to their corrosion protection performance... more Six organic coating systems were investigated according to their corrosion protection performance under simulated Arctic offshore conditions. The investigations involved accelerated aging, coating adhesion measurements, and dynamic mechanical analysis (DMA). The test conditions were adapted to Arctic offshore conditions, which mainly covered temperature shocks between −20 and −60 °C, chloride exposure, dry–wet cycles, and ultraviolet (UV) radiation. Corrosion protection capability dropped for all coatings if temperature decreased from −20 °C to −60 °C. Two types of coatings could be classified according to their response to the corrosive load: temperature-sensitive coatings and insensitive coatings. Adhesive effects (interface between coating system and substrate) were found to be marginal only at low temperatures and did not affect the response of the coatings to the corrosive load. Cohesive effects (mechanical properties of free polymer films) could be identified in terms of a very high storage modulus and changes in the loss modulus for a temperature-sensitive coating at −60 °C.

Research paper thumbnail of Nichtbrennbare, anorganische Faserverbundwerkstoffe für den Schiffbau

Lightweight design, Dec 1, 2019

Nichtbrennbare, anorganische Faserverbundwerkstoffe für den Schiffbau das Fraunhofer iGP und die ... more Nichtbrennbare, anorganische Faserverbundwerkstoffe für den Schiffbau das Fraunhofer iGP und die Tu clausthal entwickeln im Forschungsvorhaben anorKomp nichtbrennbare, anorganische Faserverbundwerkstoffe. diese ermöglichen dank der Ein stufung in die brandschutzklasse a1 die umsetzung von Leichtbaulösungen im äußerst streng reglementierten Schiffbau.

Research paper thumbnail of Untersuchung des Prozesses zum Unterwasserkleben von Halterungssystemen

Research paper thumbnail of Halterungen im Unterwasserbereich klebtechnisch fügen (Teil 1)

Adhäsion Kleben & Dichten, Jun 1, 2019

Wasser ist bislang noch nicht systematisch untersucht worden. Dennoch werden vereinzelt Klebstoff... more Wasser ist bislang noch nicht systematisch untersucht worden. Dennoch werden vereinzelt Klebstoffe unter Wasser eingesetzt, um temporäre Fügeverbindungen zu schaffen, etwa für Havarie-Abdichtungen oder Notreparaturen. Weitere Fügeszenarien im Unterwasserbereich erfordern hingegen stets eine Langzeitbeständigkeit der Verbindung. Hierfür bedarf es der Entwicklung eines zuverlässigen und robusten Verfahrens.

Research paper thumbnail of Incombustible, Inorganic Fiber-reinforced Composites for Shipbuilding

Lightweight design worldwide, Dec 1, 2019

Research paper thumbnail of Stranggelegte Leichtbautragstrukturen aus FVK*/Strand laid FRP lightweight structures

Werkstattstechnik (1997. Internet), 2015

<p>Mit verschiedenen Industriepartnern und dem Fraunhofer AGP wurde ein Fertigungsverfahren... more <p>Mit verschiedenen Industriepartnern und dem Fraunhofer AGP wurde ein Fertigungsverfahren zur Herstellung von Stabtragwerken aus faserverstärktem Kunststoff (FVK) entwickelt. Es erlaubt, beliebige Tragwerksstrukturen als ein integrales und besonders leichtes Bauteil direkt aus den Halbzeugen Roving und Matrixharz ressourceneffizient sowie kostengünstig herzustellen. Das Verfahren ist weitgehend automatisierbar. Zu den Produktbeispielen zählen unter anderem Masten, Brückenstrukturen und Rotorblätter von Windkraftanlagen. </p> <p>&amp;nbsp;</p> <p>Fraunhofer AGP has developed a process for manufacturing fibre-reinforced plastic (FRP) rod frameworks. The semi-finished products roving and resin are used to manufacture almost a random number of spatial structures as an integral and very lightweight component in a resource-efficient way at low cost. Large parts of the process can be automated. Product examples are masts, bridge structures and wind turbine blades.</p>

Research paper thumbnail of Heißpressen komplexer und endkonturnaher 3-D-Bauteile

Lightweight design, Feb 1, 2018

Research paper thumbnail of Mischbauweisen als Chance für die Klebtechnik

Adhäsion Kleben & Dichten, Aug 1, 2014

Research paper thumbnail of Manufacturing Principles for Z-Pin Reinforced FRP Composite Laminates in the Case of Bolted Joints

Lightweight design worldwide, Jun 1, 2017

Pre-loading of bolted FRP joints leads to creep and relaxation processes. Those effects are causi... more Pre-loading of bolted FRP joints leads to creep and relaxation processes. Those effects are causing a continuous pre-load loss. A newly developed production method allows a reduction of these effects by using thin CFRP pins. Those pins reinforce the composite laminate in thickness direction.

Research paper thumbnail of Fertigungstechnische Grundlagen zum Einsatz von Z-Pins beim Verschrauben von FVK-Bauteilen

Lightweight design, May 22, 2017

Research paper thumbnail of Eine wirtschaftliche Alternative zum Schweißen

Adhäsion Kleben & Dichten, Oct 1, 2015

Schiffe sind wie eine eigene kleine Stadt, in der Rohrleitungen für verschiedene Medien wie Frisc... more Schiffe sind wie eine eigene kleine Stadt, in der Rohrleitungen für verschiedene Medien wie Frisch-, Grauund Kühlwasser sowie Kraftstoff benötigt werden. Je nach Anwendungsfall variieren die Materialien und Abmessungen der auf Schiffen verbauten metallischen Rohrleitungen (Bild 1). Das derzeit überwiegend eingesetzte Verfahren zum Fügen von Rohrleitungen ist das Schweißen. Es stellt vor dem Auftrag von Korrosionsschutzbeschichtungen das optimale Fügeverfahren dar. Nach dem Beschichten ist das Schweißen jedoch mit einigen Problemen verbunden. Zum einen ist es nicht möglich, auf Korrosionsschutzbeschichtungen zu schweißen. Soll trotzdem geschweißt werden, erfordert dies ein vorheriges Entschichten. Zum anderen muss die beschichtete Umgebung vor den Einflüssen des Schweißens (Temperatureintrag, Funkenflug, Rauchgase, usw.) geschützt werden, um Beschichtungsschäden zu vermeiden, die Korrosionsprobleme zur Folge haben können. Der gesamte Prozess ist zeitund kostenintensiv. Hinzu kommt eine mangelnde Ressourceneffizienz aufgrund des wiederholten Beschichtens der geschweißten Verbindungen. Aus dieser Problematik entstand die Forderung nach einem wärmearmen Fügeverfahren für Rohrleitungen, das nach dem Beschichten angewendet werden kann. Da mechanische Lösungen wie Rohrkupplungen nicht wartungsfrei sind und Verfahren wie das Kaltlöten derzeit noch nicht problemlos anwendbar sind, wurde im Rahmen des von der Arbeitsgemeinschaft industrieller Forschungsvereinigungen „Otto von Guericke“ (AiF) geförderten Forschungsprojektes „Klebtechnisches Fügen von Rohrleitungen im Schiffbau“ eine klebtechnische Lösung entwickelt. Der erste Teil dieser vierteiligen Serie beschäftigt sich mit der Auswahl einer Oberflächenvorbehandlung sowie mit der Ermittlung thermischer Abminderungsfaktoren. Der Folgebeitrag in der Novemberausgabe wird auf die Fes-