scholarly journals Investigation of Energy-Absorbing Properties of a Bio-Inspired Structure

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 881
Author(s):  
Adrian Dubicki ◽  
Izabela Zglobicka ◽  
Krzysztof J. Kurzydłowski
Keyword(s):  
Absorption Capacity ◽  
Compression Tests ◽  
Element Analysis ◽  
Lightweight Structures ◽  
New Energy ◽  
Absorbing Material ◽  
Lightweight Structure ◽  
3D Printed ◽  
Deformation Force ◽  
Energy Absorbing

Numerous engineering applications require lightweight structures with excellent absorption capacity. The problem of obtaining such structures may be solved by nature and especially biological structures with such properties. The paper concerns an attempt to develop a new energy-absorbing material using a biomimetic approach. The lightweight structure investigated here is mimicking geometry of diatom shells, which are known to be optimized by nature in terms of the resistance to mechanical loading. The structures mimicking frustule of diatoms, retaining the similarity with the natural shell, were 3D printed and subjected to compression tests. As required, the bio-inspired structure deformed continuously with the increase in deformation force. Finite element analysis (FEA) was carried out to gain insight into the mechanism of damage of the samples mimicking diatoms shells. The experimental results showed a good agreement with the numerical results. The results are discussed in the context of further investigations which need to be conducted as well as possible applications in the energy absorbing structures.

New Energy-Absorbing High-Speed Safety Barrier

2003 ◽  
Vol 1851 (1) ◽  
pp. 53-64 ◽  
Author(s):  
John D. Reid ◽  
Ronald K. Faller ◽  
Jim C. Holloway ◽  
John R. Rohde ◽  
Dean L. Sicking
Keyword(s):  
High Speed ◽  
Steel Tube ◽  
Full Scale ◽  
Element Analysis ◽  
Dynamic Component ◽  
Testing Program ◽  
Roadside Safety ◽  
New Energy ◽  
University Of Nebraska Lincoln ◽  
Energy Absorbing

For many years, containment for errant racing vehicles traveling on oval speedways has been provided through rigid, concrete containment walls placed around the exterior of the track. However, accident experience has shown that serious injuries and fatalities may occur through vehicular impacts into these nondeformable barriers. Because of these injuries, the Indy Racing League and the Indianapolis Motor Speedway, later joined by the National Association for Stock Car Auto Racing (NASCAR), sponsored the development of a new barrier system by the Midwest Roadside Safety Facility at the University of Nebraska–Lincoln to improve the safety of drivers participating in automobile racing events. Several barrier prototypes were investigated and evaluated using both static and dynamic component testing, computer simulation modeling with LS-DYNA (a nonlinear finite element analysis code), and 20 full-scale vehicle crash tests. The full-scale crash testing program included bogie vehicles, small cars, and a full-size sedan, as well as Indy Racing League open-wheeled cars and NASCAR Winston Cup cars. A combination steel tube skin and foam energy-absorbing barrier system, referred to as the SAFER (steel and foam energy reduction) barrier, was successfully developed. Subsequently, the SAFER barrier was installed at the Indianapolis Motor Speedway in advance of the running of the 2002 Indianapolis 500 race. From the results of the laboratory testing program as well as analysis of the accidents into the SAFER barrier occurring during practice, qualification, and the race, the SAFER barrier has been shown to provide improved safety for drivers impacting the outer walls.

Design of the Lightweight Structure and its Mechanical Properties

2013 ◽  
Vol 461 ◽  
pp. 57-62
Author(s):  
Xiao Ting Jiang ◽  
Ce Guo ◽  
Xiu Yan Cao ◽  
Zhen Yu Lu
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Fiber Material ◽  
Element Analysis ◽  
Static Compression ◽  
Lightweight Structures ◽  
Carbon Fiber Material ◽  
The Finite Element Analysis ◽  
Lightweight Structure

Based on the microstructure of the cross-section of the beetle's elytra, a kind of bio-inspiredlightweight structure was designed and made by the carbon fiber material. The compressive andshear mechanical properties of the lightweight structures were studied with finite element method.In addition, quasi-static compression experiments of the structure samples were carried out. Theexperimental results and the finite element analysis results were compared and analyzed, whichproved the effectiveness of the finite element analysis.

Numerical analysis of mechanical properties of 3D printed aluminium components with variable core infill values

2020 ◽  
Vol 1 (103) ◽  
pp. 16-24
Author(s):  
P. Baras ◽  
J. Sawicki
Keyword(s):  
Numerical Analysis ◽  
Mechanical Strength ◽  
Reference Model ◽  
Reaction Force ◽  
Solid Material ◽  
Solid Core ◽  
Compression Tests ◽  
Element Analysis ◽  
Static Compression ◽  
3D Printed

Purpose: The purpose of this paper is to present numerical modelling results for 3D-printed aluminium components with different variable core infill values. Information published in this paper will guide engineers when designing the components with core infill regions. Design/methodology/approach: During this study 3 different core types (Gyroid, Schwarz P and Schwarz D) and different combinations of their parameters were examined numerically, using FEM by means of the software ANSYS Workbench 2019 R2. Influence of core type as well as its parameters on 3D printed components strength was studied. The “best” core type with the “best” combination of parameters was chosen. Findings: Results obtained from the numerical static compression tests distinctly showed that component strength is highly influenced by the type infill choice selected. Specifically, infill parameters and the coefficient (force reaction/volumetric percentage solid material) were investigated. Resulting total reaction force and percentage of solid material in the component were compared to the fully solid reference model. Research limitations/implications: Based on the Finite Element Analysis carried out in this work, it was found that results highlighted the optimal infill condition defined as the lowest amount of material theoretically used, whilst assuring sufficient mechanical strength. The best results were obtained by Schwarz D core type samples. Practical implications: In the case of the aviation or automotive industry, very high strength of manufactured elements along with a simultaneous reduction of their wight is extremely important. As the viability of additively manufactured parts continues to increase, traditionally manufactured components are continually being replaced with 3D-printed components. The parts produced by additive manufacturing do not have the solid core, they are rather filled with specific geometrical patterns. The reason of such operation is to save the material and, in this way, also weight. Originality/value: The conducted numerical analysis allowed to determine the most favourable parameters for optimal core infill configurations for aluminium 3D printed parts, taking into account the lowest amount of material theoretically used, whilst assuring sufficient mechanical strength.

The Effect of Parent Metal Properties on the Performance of Lattice Block MaterialTM

1998 ◽  
Vol 521 ◽  
Author(s):  
M. L. Renauld ◽  
A. F. Giamei ◽  
M. S. Thompson ◽  
J. Priluck
Keyword(s):  
Copper Alloys ◽  
Internal Node ◽  
Compression Tests ◽  
Parent Metal ◽  
Element Analysis ◽  
Lightweight Structure ◽  
Strength And Stiffness ◽  
Metal Properties ◽  
Experimental Findings ◽  
The Relationship

ABSTRACTLattice Block MaterialTM, or LBMTM is a unique lightweight structure consisting of repeated cells with an internal node connected to, in the most common configuration, 14 ligaments. In its metallic version, this product is available in a variety of castable metals including aluminum alloys, copper alloys, nickel alloys and steels. The relationship between LBMTM structural performance (strength and stiffness) and parent metal properties is investigated using compression tests in three primary orientations and 3-pt. bend tests. Analytical assessment of the LBMTM via finite element analysis shows reasonable agreement with experimental findings and provides predictions for LBMTM capabilities with different materials, unit cell sizes and ligament geometries.

Energy Absorption of Additively Manufactured Porous Metals with Disordered Cells

2021 ◽  
Vol 1016 ◽  
pp. 183-187
Author(s):  
Koichi Kitazono ◽  
Shiyue Guo ◽  
Ke Zhu ◽  
Takuya Hamaguchi ◽  
Yuta Fujimori
Keyword(s):  
Cell Structure ◽  
Compression Tests ◽  
Porous Metals ◽  
Element Analysis ◽  
Explicit Finite Element ◽  
3D Cad ◽  
Cell Structures ◽  
Explicit Finite Element Analysis ◽  
Absorbing Materials ◽  
Energy Absorbing

Lightweight porous metals are focused on as energy absorbing materials for automobiles. Open-cell porous metals were manufactured through additive manufacturing process. Their cell structures were designed based on Voronoi diagrams using a commercial 3D-CAD software. Both ordered and disordered cell structures with the same porosities were successfully designed in this study. Compression tests and explicit finite element analysis revealed heterogeneous deformation behaviors in ordered porous metals. On the other hand, the porous metals with disordered cell structure showed relatively isotropic and uniform deformation, which is suitable as energy absorbing materials. Controlling the disordered cell structure designed by 3D-Voronoi diagram enables to develop the advanced porous metals having various mechanical properties.

Effect of infill pattern, density and material type of 3D printed cubic structure under quasi-static loading

2020 ◽  
pp. 095440622097166
Author(s):  
Quanjin Ma ◽  
MRM Rejab ◽  
A Praveen Kumar ◽  
Hao Fu ◽  
Nallapaneni Manoj Kumar ◽  
...  
Keyword(s):  
Research Work ◽  
Compressive Loading ◽  
Compression Tests ◽  
Static Compression ◽  
Material Type ◽  
Pattern Density ◽  
Pattern Structures ◽  
3D Printed ◽  
Cubic Structure ◽  
Energy Absorbing

The present research work is aimed to investigate the effect of infill pattern, density and material types of 3D printed cubes under quasi-static axial compressive loading. The proposed samples were fabricated though 3D printing technique with two different materials, such as 100% polylactic acid (PLA) and 70% vol PLA mixed 30% vol carbon fiber (PLA/CF). Four infill pattern structures such as triangle, rectilinear, line and honeycomb with 20%, 40%, 60%, and 80% infill density were prepared. Subsequently, the quasi-static compression tests were performed on the fabricated 3D printed cubes to examine the effect of infill pattern, infill density and material types on crushing failure behaviour and energy-absorbing characteristics. The results revealed that the honeycomb infill pattern of 3D printed PLA cubic structure showed the best energy-absorbing characteristics compared to the other three infill patterns. From the present research study, it is highlighted that the proposed 3D printed structures with different material type, infill pattern and density have great potential to replace the conventional lightweight structures, which could provide better energy-absorbing characteristics.

The preparation of energy-absorbing material by using solid waste

RSC Advances ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. 9283-9289 ◽  
Author(s):  
Xin Luo ◽  
Jin-yu Xu ◽  
Weimin Li
Keyword(s):  
Solid Waste ◽  
Basalt Fiber ◽  
Lightweight Aggregate ◽  
Cellular Material ◽  
Fiber Reinforced ◽  
New Energy ◽  
Absorbing Material ◽  
Energy Absorbing

In order to develop a new energy-absorbing material by using solid waste, a basalt fiber reinforced lightweight aggregate–geopolymer based cellular material (BFRLGCM) is prepared.

scholarly journals Finite Element Analysis of 3D Printed Model via Compression Tests

2019 ◽  
Vol 35 ◽  
pp. 164-173 ◽  
Author(s):  
D.W. Abbot ◽  
D.V.V. Kallon ◽  
C. Anghel ◽  
P. Dube
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Compression Tests ◽  
Element Analysis ◽  
3D Printed

scholarly journals The mechanical performance of 3D printed hierarchical honeycombs using carbon fiber and carbon nanotube reinforced acrylonitrile butadiene styrene filaments

2020 ◽  
Vol 318 ◽  
pp. 01049
Author(s):  
Michel Theodor Mansour ◽  
Konstantinos Tsongas ◽  
Dimitris Tzetzis
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Mechanical Performance ◽  
Acrylonitrile Butadiene Styrene ◽  
Compression Tests ◽  
Fused Filament Fabrication ◽  
Element Analysis ◽  
3D Printed ◽  
Experimental Findings ◽  
Butadiene Styrene

The aim of this paper is to design hierarchical honeycombs as well as manufacturing such structures with a commercial 3D Printer using Fused Filament Fabrication (FFF) technique. The materials under study are commercial filaments such as acrylonitrile butadiene styrene (ABS), acrylonitrile butadiene styrene/carbon fibers (ABS/CF) and acrylonitrile butadiene styrene/carbon nanotubes (ABS/CNTs). The fabricated hierarchical honeycombs were examined by compression tests in order to evaluate the mechanical behaviour of such honeycomb 3D printed structures. The compression behaviour of the hierarchical honeycombs was assessed also with finite element analysis (FEA) and at the end there was a comparison with the experimental findings. The results reveal that the 2nd order hierarchy presented an increase both in stiffness and strength in comparison with the 0th and the 1st hierarchies which make such designs a suitable for structures require such properties. Also, the results reveal that ABS/carbon fiber constructs outperform the other materials under study.

scholarly journals 1258 Computational Modelling Of 3D Printed Scaffolds for Heart Valve Regeneration

2021 ◽  
Vol 108 (Supplement_6) ◽  
Author(s):  
M Georgi ◽  
L Wu ◽  
H Ma ◽  
G Hamilton ◽  
W Song
Keyword(s):  
Heart Valve ◽  
Heart Valves ◽  
Computational Modelling ◽  
Prosthetic Heart Valve ◽  
Compressive Force ◽  
Radial Pressure ◽  
Patient Specific ◽  
Compression Tests ◽  
Element Analysis ◽  
3D Printed

Abstract Aim Prosthetic heart valve replacement remains the gold standard treatment for valvular heart disease. However, its durability is limited and there is thus a need to develop an understanding of the feasibility of alternative replacement therapies. 3-dimensional printing of heart valves has been explored due to its patient-specific design and control of desired biomechanical properties. Computational studies of the synthetic valves will contribute to optimisation of designs, as well as improved understanding of the biomechanical behaviour of the complex structures. Method Aortic valve dimensions at an average of 100mmHg were used for the computerised design of the valves. Fine Element Analysis modelling generated computational experiments alongside predicted results. Simulated radial pressures tests were conducted at pressures from 0mmHg to 140mmHg and compression tests were conducted at displacement levels between 0-10mm. A Young’s modulus of 0.5 MPa was used. All simulations were conducted in a quasi-static manner. Results As the radial pressure on the valves increased, the Mises stresses increased. The maxium Mises stress of the heart valve was 0.09MPa and 0.13MPa under the pressures of 90mmHg and 140mmHg respectively. As valve displacement increased, the Mises stress of the heart valves proportionally rose. In simulated radial pressures tests, the compressive force was 0.19N at 1mm compressive displacment and 1.8N at 10mm compressive displacment. Conclusions The simulations demonstrated that 3D-printed heart valve scaffolds can withstand simulated radial pressure and compression tests. A further mechanical tests of the printed scaffold and understanding of its response to hemodynamic dynamic flow is required for the continuity of further study.

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