Numerical and experimental investigation of 3D printed origami unit cells and cores for load resistance

2019 ◽  
Author(s):  
Mohamed Ali E. Kshad ◽  
Hani E. Naguib
Keyword(s):  
Experimental Investigation ◽  
Load Resistance ◽  
Unit Cells ◽  
3D Printed

scholarly journals Experimental investigation on fabrication of thermoset prepreg composites using automated fibre placement process and 3D printed substrate

Procedia CIRP ◽  
2019 ◽  
Vol 85 ◽  
pp. 296-301
Author(s):  
Rajkumar Velu ◽  
Nahaad Mohammed Vaheed ◽  
Chadurvedi Venkatesan ◽  
Felix Raspall ◽  
Murali Krishnan
Keyword(s):  
Experimental Investigation ◽  
3D Printed

scholarly journals Experimental investigations of the performance of a thermoacoustic electricity generator

2019 ◽  
Vol 116 ◽  
pp. 00025
Author(s):  
Ahmed Hamood ◽  
Artur Jaworski
Keyword(s):  
Experimental Investigation ◽  
Acoustic Wave ◽  
Load Resistance ◽  
Experimental Investigations ◽  
The Novel ◽  
Working Medium ◽  
Linear Alternator ◽  
Mean Pressure ◽  
Set Up ◽  
Working Parameters

This paper presents the experimental investigation of a two-stage thermoacoustic electricity generator able to convert heat at the temperature of the exhaust gases of an internal combustion into useful electricity. The novel configuration is one wavelength and consists of two identical stages. The identical stages will have out of phase acoustic wave at similar amplitudes which allows coupling a linear alternator to run in push-pull mode. The experimental set-up is 16.1 m long and runs at 54.7 Hz. The working medium is helium at 28 bar. The maximum generated electric power is 73.3 W at 5.64% thermal-to-electric efficiency. The working parameters including load resistance, mean pressure and heating power were investigated.

Structure, Process, and Material Influences for 3D Printed Lattices Designed With Mixed Unit Cells

2020 ◽  
Author(s):  
Gabriel Briguiet ◽  
Paul F. Egan
Keyword(s):  
Elastic Modulus ◽  
Mechanical Testing ◽  
Mechanical Response ◽  
Cell Types ◽  
Unit Cell ◽  
Ultraviolet Curing ◽  
Mechanical Responses ◽  
Lattice Design ◽  
Unit Cells ◽  
3D Printed

Abstract Emerging 3D printing technologies are enabling the design and fabrication of novel architected structures with advantageous mechanical responses. Designing complex structures, such as lattices, with a targeted response is challenging because build materials, fabrication process, and topological design have unique influences on the structure’s mechanical response. Changing any factor may have unanticipated consequences, even for simpler lattice structures. Here, we conduct mechanical compression experiments to investigate varied lattice design, fabrication, and material combinations using stereolithography printing with a biocompatible polymer. Mechanical testing demonstrates that a higher ultraviolet curing time increases elastic modulus. Material testing demonstrated that anisotropy does not strongly influence lattice mechanics. Designs were altered by comparing homogenous lattices of single unit cell types and heterogeneous lattices that combine two types of unit cells. Unit cells for heterogeneous structures include a Cube design for a high elastic modulus and Cross design for improved shear response. Mechanical testing of three heterogeneous layouts demonstrated how unit cell organization influences mechanical outcomes, therefore enabling the tuning of an elastic modulus that surpasses the law of averages designed for application-dependent mechanical needs. These findings provide a foundation for linking design, process, and material for engineering 3D printed structures with preferred properties, while also facilitating new directions in design automation and optimization.

Theoretical and Experimental Investigation study of Data Driven Work Envelope Modelling for 3D Printed Soft Pneumatic Actuators

2021 ◽  
pp. 112978
Author(s):  
MennaAllah Soliman ◽  
Mahmood Abdallah Saleh ◽  
Mostafa A. Mousa ◽  
Mahmoud Elsamanty ◽  
Ahmed Gomaa Radwan
Keyword(s):  
Experimental Investigation ◽  
Data Driven ◽  
Pneumatic Actuators ◽  
3D Printed ◽  
Work Envelope

scholarly journals Layer Adhesion Test of Additively Manufactured Pins: A Shear Test

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 55
Author(s):  
Márton Tamás Birosz ◽  
Mátyás Andó ◽  
Ferenc Safranyik
Keyword(s):  
Shear Test ◽  
Great Influence ◽  
Load Resistance ◽  
Simulation Software ◽  
Modern Engineering ◽  
Random Failure ◽  
Failure Properties ◽  
3D Printed ◽  
Concentric Circles ◽  
Functional Components

Additive Manufacturing (AM) became a popular engineering solution not only for Rapid Prototyping (RP) as a part of product development but as an effective solution for producing complex geometries as fully functional components. Even the modern engineering tools, such as the different simulation software, have a shape optimization solution especially for parts created by AM. To extend the application of these methods in this work, the failure properties of the 3D-printed parts have been investigated via shear test measurements. The layer adhesion can be calculated based on the results, which can be used later for further numerical modeling. In conclusion, it can be stated that the layer formation and the structure of the infill have a great influence on the mechanical properties. The layers formed following the conventional zig-zag infill style show a random failure, and the layers created via extruded concentric circles show more predictable load resistance.

scholarly journals 3D Printed Double Roller-Based Triboelectric Nanogenerator for Blue Energy Harvesting

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1089
Author(s):  
Inkyum Kim ◽  
Daewon Kim
Keyword(s):  
Energy Harvesting ◽  
Water Waves ◽  
Load Resistance ◽  
Triboelectric Nanogenerator ◽  
Electrode Structure ◽  
A Value ◽  
Covered Area ◽  
Covered Electrodes ◽  
3D Printed ◽  
Triboelectric Nanogenerators

The ocean covers 70% of the earth’s surface and is one of the largest uncultivated resources still available for harvesting energy. The triboelectric energy harvesting technology has the potential to effectively convert the ocean’s “blue energy” into electricity. A half-cylinder structure including rollers floating on the water has already been used, in which the pendulum motion of the rollers is driven by the waveform. For the stable motion of the rollers, the printed surface of the device was treated with acetone for attaining hydrophilicity. The electrical outputs with the proposed device were enhanced by increasing the contact surface area by simply implementing the double roller structure with double side-covered electrodes. With the optimized structure, the maximum power density reached a value of 69.34 µW m−2 at a load resistance of 200 MΩ with the device’s high output durability. Finally, the fabricated device was also applied to the artificial water waves to demonstrate the possibility of using this device in the ocean. By simply modifying the electrode structure and adding a roller, this device demonstrated the ability to generate over 160% of electrical output with the same covered area of the ocean by the triboelectric nanogenerators (TENGs) and potential ocean application.

Sign in / Sign up

Export Citation Format

Share Document