ANALYSIS OF PRINTING PARAMETERS IN 3D PRINTED CARBON FIBER COMPOSITES USING DESIGN OF EXPERIMENTS

2021 ◽  
Author(s):  
JAKUB SYCHLA ◽  
CHAO ZHANG ◽  
K. T. TAN
Keyword(s):  
Carbon Fiber ◽  
Flexural Strength ◽  
Structural Integrity ◽  
Fiber Composites ◽  
Fiber Reinforced Polymers ◽  
Carbon Fiber Composites ◽  
3D Print ◽  
Cfrp Composite ◽  
Fill Pattern ◽  
Ductile Behavior

Additive manufacturing of carbon fiber reinforced polymers (CFRP) provides the advantage of quick prototyping of complex geometries, while maintaining light-weight characteristics and keeping structural integrity. This paper presents flexural strength data from 3D printing of an onyx and carbon fiber composites. A MarkForged Mark 2 3D printer, with a dual printer head, is used to 3D print several configurations of CFRP composites. The configurations are set to examine the extreme parameters of the rectangular fill pattern, including fill density, roof and floor layers, and wall layers. The print angle along with the fill pattern stays consistent. Each sample comprises twenty- four layers of CFRP and undergoes a three-point bend test. Test data of load, deflection, and maximum stress are compared among the different configurations. Results show that the roof/floor layer has the largest impact on the flexural strength for each configuration. The configurations with less roof/floor layers are able to take on a larger load, because there are more CFRP layers present; while specimens with more roof/floor layers withstand less load and behave more ductile. These results show that the amount of roof/floor layers can change the CFRP composite from its usual brittle characteristic to a ductile behavior.

scholarly journals Influence of the Infill Orientation on the Properties of Zirconia Parts Produced by Fused Filament Fabrication

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3158 ◽  
Author(s):  
Santiago Cano ◽  
Tanja Lube ◽  
Philipp Huber ◽  
Alberto Gallego ◽  
Juan Alfonso Naranjo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Complex Geometries ◽  
Fused Filament Fabrication ◽  
Moisture Evaporation ◽  
Bending Tests ◽  
Three Point Bending ◽  
Different Types ◽  
Fill Pattern ◽  
The Many

The fused filament fabrication (FFF) of ceramics enables the additive manufacturing of components with complex geometries for many applications like tooling or prototyping. Nevertheless, due to the many factors involved in the process, it is difficult to separate the effect of the different parameters on the final properties of the FFF parts, which hinders the expansion of the technology. In this paper, the effect of the fill pattern used during FFF on the defects and the mechanical properties of zirconia components is evaluated. The zirconia-filled filaments were produced from scratch, characterized by different methods and used in the FFF of bending bars with infill orientations of 0°, ±45° and 90° with respect to the longest dimension of the specimens. Three-point bending tests were conducted on the specimens with the side in contact with the build platform under tensile loads. Next, the defects were identified with cuts in different sections. During the shaping by FFF, pores appeared inside the extruded roads due to binder degradation and or moisture evaporation. The changes in the fill pattern resulted in different types of porosity and defects in the first layer, with the latter leading to earlier fracture of the components. Due to these variations, the specimens with the 0° infill orientation had the lowest porosity and the highest bending strength, followed by the specimens with ±45° infill orientation and finally by those with 90° infill orientation.

Implementation of ultrafast X-ray diffraction at the 1W2B wiggler beamline of Beijing Synchrotron Radiation Facility

2016 ◽  
Vol 23 (3) ◽  
pp. 830-835 ◽  
Author(s):  
Da-Rui Sun ◽  
Guang-Lei Xu ◽  
Bing-Bing Zhang ◽  
Xue-Yan Du ◽  
Hao Wang ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Laser Pulse ◽  
Time Resolution ◽  
Repetition Rate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Beijing Synchrotron Radiation Facility ◽  
Pixel Array ◽  
Fill Pattern ◽  
Mode A

The implementation of a laser pump/X-ray probe scheme for performing picosecond-resolution X-ray diffraction at the 1W2B wiggler beamline at Beijing Synchrotron Radiation Facility is reported. With the hybrid fill pattern in top-up mode, a pixel array X-ray detector was optimized to gate out the signal from the singlet bunch with interval 85 ns from the bunch train. The singlet pulse intensity is ∼2.5 × 106 photons pulse−1at 10 keV. The laser pulse is synchronized to this singlet bunch at a 1 kHz repetition rate. A polycapillary X-ray lens was used for secondary focusing to obtain a 72 µm (FWHM) X-ray spot. Transient photo-induced strain in BiFeO3film was observed at a ∼150 ps time resolution for demonstration.

Transverse bunch-by-bunch feedback system for time-resolved experiments at PLS-II

2021 ◽  
Vol 28 (5) ◽  
Author(s):  
Jaeyu Lee ◽  
T. Nakamura ◽  
K. Kobayashi ◽  
D.-T. Kim ◽  
T. Ha ◽  
...  
Keyword(s):  
Feedback System ◽  
Feedback Loops ◽  
Two Dimensional ◽  
Digital Converter ◽  
Time Resolved ◽  
Analog To Digital ◽  
One Dimensional ◽  
Measurement Function ◽  
Pohang Light Source ◽  
Fill Pattern

A description of the upgraded bunch-by-bunch feedback system for time-resolved experiments at Pohang Light Source II (PLS-II) is provided. The bunch-by-bunch feedback system has been upgraded to increase the single-bunch current in the hybrid fill pattern of the PLS-II facility. The project is part of the SPring-8 and PLS-II collaboration. The main features of the upgrade are to employ a single 500 MHz analog-to-digital converter (ADC) instead of the previous four 125 MHz interleaved ADCs for 500 MHz rate, to replace a single-loop two-dimensional feedback with two independent one-dimensional feedback loops, to implement the tune measurement function with a single bunch, and mainly to implement single-bunch and stretcher control. The realization of a 400 mA hybrid fill pattern including a 10 mA single bunch demonstrates the precision of the upgraded bunch-by-bunch feedback system.

Bunch fill pattern at BESSY monitored by time-correlated single photon counting

2007 ◽  
Author(s):  
Karsten Holldack ◽  
Michael v. Hartrott ◽  
Frank Hoeft ◽  
Oliver Neitzke ◽  
Erik Bauch ◽  
...  
Keyword(s):  
Single Photon ◽  
Photon Counting ◽  
Single Photon Counting ◽  
Fill Pattern
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