The Hybrid RTM Process Chain: Automated Insertion of Load Introducing Elements during Subpreform Assembling

2015 ◽  
Vol 794 ◽  
pp. 312-319 ◽  
Author(s):  
Fabian Ballier ◽  
Jan Schwennen ◽  
Julian Berkmann ◽  
Jürgen Fleischer
Keyword(s):  
Automobile Industry ◽  
Process Chain ◽  
Structural Components ◽  
Fiber Reinforced ◽  
Transfer Molding ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastics ◽  
Rtm Process ◽  
Reinforced Plastic ◽  
Fiber Reinforced Plastics

Fiber reinforced plastics are increasingly employed in the automobile industry. The process chain of resin transfer molding offers one approach for realizing structural components made of fiber reinforced plastic in high quantities. In order to increase economic efficiency, automated solutions for the subpreform assembly are required. There is also the need for mechanically highly stressable and at the same time economical joining techniques for joining fiber reinforced plastics with metal. The following article shall provide an approach to meet both of these requirements.

Micro-Drilling of CFRP Plates Using a High-Speed Spindle

2012 ◽  
Vol 523-524 ◽  
pp. 1035-1040 ◽  
Author(s):  
Keiji Ogawa ◽  
Heisaburo Nakagawa ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama
Keyword(s):  
Cutting Forces ◽  
High Speed ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastics ◽  
Cfrp Plate ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic ◽  
Micro Drilling ◽  
Fiber Reinforced Plastics

Fundamental characteristics in the micro drilling of carbon fiber reinforced plastic (CFRP) plates are investigated in the present paper. When micro drilling with a high-speed spindle, cutting forces during drilling, such as thrust force and torque, were measured by high resolution dynamometers and drill temperature was monitored by thermography. Comparing the experimental results of CFRP with that of drilling glass fiber-reinforced plastics (GFRP) revealed some unique tendencies. The cutting forces and drill temperature increased drastically. Moreover, drill wear rapidly accelerated. The tool life of CFRP plate drilling is much shorter than that of other plates.

Development of PCD Milling Tool for Carbon-Fiber-Reinforced Plastics

2014 ◽  
Vol 1017 ◽  
pp. 411-414
Author(s):  
Takayuki Kitajima ◽  
Jumpei Kusuyama ◽  
Akinori Yui ◽  
Katsuji Fujii ◽  
Yosuke Itoh
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Polycrystalline Diamond ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastics ◽  
Reinforced Plastic ◽  
Milling Tool ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

Interest in carbon-fiber-reinforced plastic (CFRP) has been growing for the last several years. CFRP, a composite material made of carbon fibers and resins, has high mechanical characteristics and is well known as a difficult-to-cut material. During the process of drilling or cutting of CFRP, tool wear and delamination occur frequently. In this study, the authors developed a milling tool for CFRP using polycrystalline diamond, and the cutting performance of the developed tool was investigated.

Activation time- and electrical power-dependent deformation behavior of adaptive fiber-reinforced plastics

2019 ◽  
Vol 53 (20) ◽  
pp. 2777-2788 ◽  
Author(s):  
Moniruddoza Ashir
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Electrical Power ◽  
Fiber Reinforced ◽  
Activation Time ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastics ◽  
Hybrid Yarn ◽  
Reinforced Plastic ◽  
Fiber Reinforced Plastics

There is considerable need for research into the application potential of adaptive fiber-reinforced plastics based on shape memory alloys, in particular with regard to industry-specific solutions. Hence, this paper presents the activation time- and voltage amplitude-dependent deformation behavior of adaptive fiber-reinforced plastics incorporating shape memory alloy. In order to attain this goal, shape memory alloy was textile-technically converted into shape memory alloy hybrid yarn using the friction spinning technology. Subsequently, the manufactured hybrid yarn was integrated into the reinforcing fabric in the warp direction using weaving technology. To increase the deformation potential of the adaptive fiber-reinforced plastic, a hinged woven fabric was developed by floating of the warp yarn. The functionalized preform was infused by the Seemann Corporation Resin Infusion Molding Process. Later, an extensive electro-mechanical characterization of the adaptive fiber-reinforced plastic by varying electrical power resulting from the varying voltage amplitude and activation time was completed. The maximum deformation of adaptive fiber-reinforced plastics was achieved at an electrical power of 95 W (50 V/1.9 A) and 60 s of thermal induced activation.

Werkzeugeintritt beim Rührreibschweißen/Friction Stir Welding of Fiber Reinforced Plastics

2021 ◽  
Vol 111 (11-12) ◽  
pp. 840-845
Author(s):  
Sascha Stribick ◽  
Erik Dieringer ◽  
Patrick Huber
Keyword(s):  
Friction Stir Welding ◽  
Full Potential ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Friction Stir ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastics ◽  
Reinforced Composite ◽  
Reinforced Plastic ◽  
Fiber Reinforced Plastics

Faserverbundkunststoffe besitzen ein hohes industrielles Interesse. Die bisher industrieüblichen Fügeverfahren besitzen jedoch noch große prozessspezifische Nachteile für diese Werkstoffklasse, sodass das volle Potenzial des Werkstoffes durch Beschädigen der Fasern nicht ausgeschöpft werden kann. Rührreibschweißen kann dieses Potenzial nutzen. Im Rahmen dieses Beitrags werden Grundlagenuntersuchungen der Eintrittsphase näher betrachtet. Diese dienen als Basis für weiterführende Schweißversuche.   Fiber reinforced plastic composites are well known in the industry. Common joining processes in the industry often have process specific disadvantages for this material class like damage of the fibers. Therefore it isn’t possible to use the full potential of the composites. Friction Stir Welding can use the full potential of the fiber reinforced composite. Fundamental researches of the entry phase are presented in this paper. These results can be used for further welding experiments.

Joining Parameters and Handling System for Automated Subpreform Assembly

2016 ◽  
Vol 840 ◽  
pp. 66-73
Author(s):  
Jürgen Fleischer ◽  
Fabian Ballier ◽  
Matthias Dietrich
Keyword(s):  
Resin Transfer Molding ◽  
Large Series ◽  
Assembly Process ◽  
Fiber Reinforced ◽  
Processing Efficiency ◽  
Handling System ◽  
Transfer Molding ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Automated Line

The production and processing of fiber-reinforced plastics (FRP) is constantly increasing in industry. A commonly used method is resin transfer molding (RTM). FRP components are produced for large series by now. Therefore, the aspect of processing efficiency is becoming more and more important. The semi-finished product can be better exploited, for example, if large preforms were composed of single subpreforms. These subpreforms are easier to drape and can be produced within an automated line. Consequently, the necessary assembly of the subpreforms needs to be automated as well. This way, the process can be made time and resource efficient. The article that follows now will focus more closely on a concept that deals with the handling and subsequent assembling of subpreforms. Furthermore, the variables that can be adjusted for the assembly process are examined and their influence on the resulting connection quality is shown.

Z-pin insertion process for through-thickness reinforced thermoplastic composites

2018 ◽  
Vol 53 (2) ◽  
pp. 173-181 ◽  
Author(s):  
Julian Hoffmann ◽  
Alexander Brast ◽  
Gerhard Scharr
Keyword(s):  
Thermoplastic Composites ◽  
Fiber Reinforced ◽  
Fiber Waviness ◽  
Reinforced Plastics ◽  
Pullout Tests ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic ◽  
Novel Method ◽  
Fiber Reinforced Plastics ◽  
Insertion Process

This paper presents a novel method for the ultrasonically assisted insertion of metallic z-pins into thermoplastic composites. Mechanical and microstructural investigations were carried out on glass fiber-reinforced polyamide and polypropylene specimens. The insertion of steel pins into thermoplastic composites led to microstructural changes that differ significantly from the known microstructure of z-pinned thermoset fiber-reinforced plastics. Optical microscopy showed an absence of notable fiber waviness and resin-rich zones around each pin. Instead, the fibers were predominantly deflected in the through-thickness direction by the high insertion forces arising during pin penetration. To gain an initial insight on the resulting properties of the z-pin/thermoplastic interface, the mechanical properties of z-pinned thermoplastic composites under mode I loading were investigated using pullout tests. For reference, the pullout behavior of thermoset carbon fiber-reinforced plastic specimens, reinforced with steel pins was determined too. Due to the poor bonding and lack of friction between the pin and laminate, the determined traction loads of the thermoplastic specimens are well below typical values achieved from pin pullout in thermoset laminates.

Study on Acoustic Emission Detection Technology of Fiber Reinforced Plastic Pressure Vessel

2020 ◽  
Author(s):  
Daoxiang Wei ◽  
Yuqing Yang ◽  
Jun Si ◽  
Xiang Wen
Keyword(s):  
Acoustic Emission ◽  
Pressure Vessel ◽  
Pressure Vessels ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Glass Fiber Composites ◽  
Reinforced Plastics ◽  
Detection Technology ◽  
Reinforced Plastic ◽  
Emission Detection

Abstract Fiber reinforced plastics are used in pressure vessel manufacturing because of their high strength and corrosion resistance.Defects may occur in the manufacture and use of the pressure vessel. To ensure safe operation of the pressure vessel, it is necessary to conduct periodic safety assessment of the pressure vessel put into operation. It is difficult to evaluate the safety status of fiber-reinforced plastic pressure vessels by conventional nondestructive testing.Acoustic emission detection technology is a dynamic detection method, which has obvious advantages for the performance and fracture process of fiber reinforced plastic materials. ASME section V or ASTM section on acoustic emission detection of FRP pressure vessels, in which the localization of defects is mainly based on acoustic emission instruments. Due to the anisotropy of FRP material, the instrument can only give the area of the defect, and then use other non-destructive testing methods supplementary detection, so the author proposes a regional positioning method, which can locate defects more accurately. In this paper, acoustic emission detection method and lead breaking method were used to simulate the deficiency, and acoustic velocity attenuation and variation of fiber reinforced plastics were studied, and confirmative tests were carried out to obtain the positioning accuracy of the deficiency in different areas.In order to achieve the acoustic emission (AE) response behavior of stretching damage of glass fiber composites with fiber pre-broken and weak bonding, stretching tests and real-time AE monitoring of glass fiber composites were conducted.Experimental results showed that damage model such as matrix cracking and fiber fracture and bending could be occurred in the process of damage and failure. The composition and content of signal frequency of AE is also different because of difference of preset defect.

The Effect of Fiber Winding Angles on the Bending Strength of Fiber-Reinforced Plastic Rods

2007 ◽  
Vol 345-346 ◽  
pp. 661-664
Author(s):  
Hoy Yul Park ◽  
Moon Kyong Na ◽  
Myeong Sang Ahn ◽  
Seog Young Yoon ◽  
Seong Soo Park
Keyword(s):  
Bending Strength ◽  
High Strength ◽  
Shear Stresses ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastics ◽  
Reinforced Plastic ◽  
Bending Load ◽  
The Difference ◽  
Fiber Winding

Fiber-reinforced plastics consist of fibers of high strength and modulus embedded in, or bonded to a matrix with distinct interfaces between them. Because fiber configuration plays a key role in determining mechanical strength of fiber-reinforced plastic rods, especially bending strength of fiber-reinforced plastic rods was measured and simulated numerically in variation with winding angles. Also, stress distribution in fiber-reinforced plastic rods was simulated numerically under the condition of constant bending load to fiber-reinforced plastic rods. The measured bending strength of fiber-reinforced plastic rods in variation with winding angles was different from that of simulated. The difference between measured and simulated results was due to the effect of shear stresses on the strength of fiber-reinforced plastic rods.

Modelling of Manufacturing Processes by FEA-Method for the Production of Natural Fiber-Reinforced Plastics

2007 ◽  
Author(s):  
Christian Doersch ◽  
Joerg Muessig ◽  
Dieter H. Mueller
Keyword(s):  
Natural Fiber ◽  
Cost Effective ◽  
Textile Material ◽  
Market Demand ◽  
Fiber Reinforced ◽  
Element Analysis ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastics ◽  
Reinforced Plastic ◽  
Plastic Components

In recent years a growing demand for natural fiber-reinforced plastic components and structures has been observed. One important area of application is transportation, particularly in the automotive industry. Due to market demand, innovative process technologies for fast, cost-effective and quality-driven manufacture of natural fiber-reinforced plastic components is required. This paper will focus on the development of technologies for automised manufacturing of NFRP-components with resin infusion processes. At present NFRP-components are manufactured automatically but without flexibility concerning the deviations of material properties or part geometries. This lack of control in manufacturing results in long cycle times, low process control and high costs. The Bremen Institute for Engineering Design (BIK) is developing and improving machine and process technologies for automised textile handling. The handling system has to meet the requirements of large, limp textile material. The authors have mutually developed methods for the simplified simulation of textiles. The simulation supports the evaluation of textiles and handling devices concerning the ability for better control in manufacturing. To meet these requirements, a simulation of the textile material with the “Finite Element Analysis” method supports the part and process design by reducing developing time and costs. For this purpose, the authors showed a simplified model with a reduced set of material data which is required for the FEA-model.

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