scholarly journals Mechanical Properties of Short Fiber-Reinforced Geopolymers Made by Casted and 3D Printing Methods: A Comparative Study

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 579 ◽  
Author(s):  
Kinga Korniejenko ◽  
Michał Łach ◽  
Shih-Yu Chou ◽  
Wei-Ting Lin ◽  
An Cheng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
3D Printing ◽  
Casting Process ◽  
Short Fiber ◽  
Fiber Reinforced ◽  
Geopolymer Matrix ◽  
Layer Manufacturing ◽  
Injection Methods ◽  
Class F Fly Ash

The main objective of this article is to develop ceramic-based materials for additive layer manufacturing (3D printing technology) that are suitable for civil engineering applications. This article is focused on fly ash-based fiber-reinforced geopolymer composites. It is based on experimental research, especially research comparing mechanical properties, such as compressive and flexural strength for designed compositions. The comparison includes various composites (short fiber-reinforced geopolymers and plain samples), different times of curing (investigation after 7 and 28 days), and two technologies of manufacturing (casted and injected samples—simulations of the 3D printing process). The geopolymer matrix is based on class F fly ash. The reinforcements were green tow flax and carbon fibers. The achieved results show that the mechanical properties of the new composites made by injection methods (simulations of 3D technology) are comparable with those of the traditional casting process. This article also discusses the influence of fiber on the mechanical properties of the composites. It shows that the addition of short fibers could have a similar influence on both of the technologies.

scholarly journals Flexure Behaviors of ABS-based Composites Containing Carbon and Kevlar Fibers by Material Extrusion 3D Printing

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1878 ◽  
Author(s):  
Wang ◽  
Li ◽  
Rao ◽  
Wu ◽  
Peng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Short Fiber ◽  
Fiber Reinforced ◽  
Material Extrusion ◽  
Kevlar Fiber ◽  
3D Printed ◽  
Reinforced Thermoplastics ◽  
Short Carbon ◽  
Strength And Ductility

: Short-fiber-reinforced thermoplastics are popular for improving the mechanical properties exhibited by pristine thermoplastic materials. Due to the inherent conflict between strength and ductility, there are only a few successful cases of simultaneous enhancement of these two properties in polymer composite components. The objective of this work was to explore the feasibility of simultaneous enhancement of strength and ductility in ABS-based composites with short-carbon and Kevlar fiber reinforcement by material extrusion 3D printing (ME3DP). Microstructure characterization and measurement of thermal and mechanical properties were conducted to evaluate the fiber-reinforced ABS. The influence of printing raster orientation and build direction on the mechanical properties of material extrusion of 3D-printed composites was analyzed. Experimental results demonstrated that the reinforcement of the ABS-based composites by short-carbon and Kevlar fibers under optimized 3D-printing conditions led to balanced flexural strength and ductility. The ABS-based composites with a raster orientation of ±45° and side build direction presented the highest flexural behaviors among the samples in the current study. The main reason was attributed to the printed contour layers and the irregular zigzag paths, which could delay the initiation and propagation of microcracks.

scholarly journals Mechanical properties, volumetric shrinkage and depth of cure of short fiber-reinforced resin composite

2016 ◽  
Vol 35 (3) ◽  
pp. 418-424 ◽  
Author(s):  
Akimasa TSUJIMOTO ◽  
Wayne W. BARKMEIER ◽  
Toshiki TAKAMIZAWA ◽  
Mark A. LATTA ◽  
Masashi MIYAZAKI
Keyword(s):  
Mechanical Properties ◽  
Resin Composite ◽  
Short Fiber ◽  
Volumetric Shrinkage ◽  
Fiber Reinforced ◽  
Depth Of Cure

Effect of fly ash/silica fume ratio and curing condition on mechanical properties of fiber-reinforced geopolymer

2020 ◽  
Vol 9 (4) ◽  
pp. 218-232 ◽  
Author(s):  
Piti Sukontasukkul ◽  
Prinya Chindaprasirt ◽  
Phattharachai Pongsopha ◽  
Tanakorn Phoo-Ngernkham ◽  
Weerachart Tangchirapat ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Silica Fume ◽  
Fiber Reinforced ◽  
Curing Condition

Statistical evaluation of the mechanical properties of high-volume class F fly ash concretes

2014 ◽  
Vol 54 ◽  
pp. 432-442 ◽  
Author(s):  
Seyoon Yoon ◽  
Paulo J.M. Monteiro ◽  
Donald E. Macphee ◽  
Fredrik P. Glasser ◽  
Mohammed Salah-Eldin Imbabi
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Statistical Evaluation ◽  
High Volume ◽  
Class F Fly Ash ◽  
Class F

Robotic Manufacturing of Near-Net Shaped Short-Fiber Reinforced Composites With Functional Properties

2009 ◽  
Author(s):  
Antony Paul ◽  
Jeffery M. Gallagher ◽  
Raymond J. Cipra ◽  
Thomas Siegmund
Keyword(s):  
Mechanical Properties ◽  
Fiber Orientation ◽  
Fiber Composite ◽  
Imaging Techniques ◽  
Short Fiber ◽  
Robotic Arm ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Geometric Data ◽  
Reinforced Composite

Fiber reinforced composite materials are now frequently being used over conventional materials for their ability to achieve tailored properties and performance characteristics. With the recent advancements in manufacturing techniques, short-fiber composites are coming into prominence in this sector, with their cost advantage and their capability for large throughput. Randomness of fiber orientation is inherent to short fiber composite manufacturing processes. In order to effectively manipulate the mechanical properties of a short-fiber reinforced composite, it is imperative to adequately control the orientation of the fibers during the deposition stage. A process is currently developed to acquire geometrical data of the target object and to utilize it to create a short-fiber reinforced component with controlled fiber orientation. The topological data acquisition of the object is made possible using non-contact 3D imaging techniques. The geometric data is then transferred to a commercial CAD package for the added capability to manipulate the geometry as may be required for specific applications. Subsequently, geometric data constitutes the basis of path planning for the tooling processes. In our process, a novel rapidly re-configurable tooling and molding technology is employed by which a 6-axis robotic arm is used to sculpt a pin-device vacuum surface. After the tooling is completed, the robotic arm will use a deposition nozzle to orient a steady stream of initially random short-fiber from a feeder into a unidirectional output, onto the tool surface. By controlling the position and orientation of the deposition nozzle, it is possible to control the orientation and density of fiber in each section of the near-net shaped composite pre-form. The fiber pre-form is then impregnated with a suitable matrix medium and cured to create the required component. The outlined process is thus capable of manufacturing a near-net shaped short-fiber reinforced component with highly specific mechanical properties. One of the many applications envisaged using this process is the manufacture of custom form-fitting braces, masks and guards for use in healthcare products. A patient intervention can have his or her features acquired using stereo-imaging and have corrective measures incorporated into the device prior to manufacturing. By controlling the orientation and density of the fiber at different portions of the device, it is possible to provide adequate support at specific areas or to restrict movement in specific directions while providing compliance to movement in the others.

scholarly journals 3D Printing of Continuous Fiber Reinforced Low Melting Point Alloy Matrix Composites: Mechanical Properties and Microstructures

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3463
Author(s):  
Xin Wang ◽  
Xiaoyong Tian ◽  
Lixian Yin ◽  
Dichen Li
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Matrix Composite ◽  
Raw Materials ◽  
Low Cost ◽  
Metallic Matrix ◽  
Interfacial Microstructure ◽  
Fiber Reinforced ◽  
Continuous Fiber ◽  
Alloy Matrix

A novel 3D printing route to fabricate continuous fiber reinforced metal matrix composite (CFRMMC) is proposed in this paper. It is distinguished from the 3D printing process of polymer matrix composite that utilizes the pressure inside the nozzle to combine the matrix with the fiber. This process combines the metallic matrix with the continuous fiber by utilizing the wetting and wicking performances of raw materials to form the compact internal structures and proper fiber-matrix interfaces. CF/Pb50Sn50 composites were printed with the Pb50Sn50 alloy wire and modified continuous carbon fiber. The mechanical properties of the composite specimens were studied, and the ultimate tensile strength reached 236.7 MPa, which was 7.1 times that of Pb50Sn50 alloy. The fracture and interfacial microstructure were investigated and analyzed. The relationships between mechanical properties and interfacial reactions were discussed. With the optimized process parameters, several composites parts were printed to demonstrate the advantages of low cost, short fabrication period and flexibility in fabrication of complex structures.

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