scholarly journals Origin of nonlinear force distributions in a composite system

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Yuto Tamura ◽  
Marie Tani ◽  
Rei Kurita
Keyword(s):  
Composite Materials ◽  
Composite System ◽  
Density Difference ◽  
High Yield ◽  
Particle Model ◽  
Force Distribution ◽  
Soft Particle ◽  
Mechanical Responses ◽  
Load Response ◽  
Nonlinear Force

AbstractComposite materials have been actively developed in recent years because they are highly functional such as lightweight, high yield strength, and superior load response. In spite of importance of the composite materials, mechanisms of the mechanical responses of composites have been unrevealed. Here, in order to understand the mechanical responses of composites, we investigated the origin and nature of the force distribution in heterogeneous materials using a soft particle model. We arranged particles with different softness in a lamellar structure and then we applied homogeneous pressure to the top surface of the system. It is found that the density in each region differently changes and then the density difference induces a nonlinear force distribution. In addition, it is found that the attractive interaction suppresses the density difference and then the force distribution is close to the theoretical prediction. Those findings may lead material designs for functional composite materials.

scholarly journals Design Analysis of Chassis used in Self-Propelled Onion Harvester using FEA Tool

2021 ◽  
Vol 9 (VI) ◽  
pp. 3099-3105
Author(s):  
Kiran Gosavi
Keyword(s):  
Fuel Economy ◽  
Factor Of Safety ◽  
Material Selection ◽  
High Yield ◽  
Force Distribution ◽  
Element Analysis ◽  
Pros And Cons ◽  
Induced Stresses ◽  
Selection Strength ◽  
Comparative Results

Onion farming is more commonly practiced for an irrigated crop, resulting in a high yield with large sized bulbs. Manual harvesting of an onion being meticulous requires a large amount of manpower as well as time. Thus, we have constructed and evaluated a self-propelled onion harvester which will have good performance in terms of productivity, fuel economy, less damage to crop and operator comfort. This paper is intended to discuss the results of the design and analysis of the chassis under the guidelines of the SAE TIFAN rulebook [1]. The chassis is designed using tool CATIA V5 followed by Finite element analysis (FEA) using ANSYS and the consequent results have been plotted and comparative results of old and modified chassis has proposed. During chassis designing and analysis, several factors are taken into account like material selection, strength, durability, boundary conditions, force distribution, induced stresses, optimum factor of safety, ergonomics and aesthetics. All the decisions for design are based on all pros and cons from testing and results of previous competitions.

FSI Analysis the Dynamic Performance of Composite Propeller

2018 ◽  
Author(s):  
Fanchen Zhang ◽  
Jianjun Ma
Keyword(s):  
Composite Materials ◽  
Dynamic Performance ◽  
High Yield ◽  
Maintenance Cost ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Marine Propeller ◽  
Marine Propellers ◽  
Superior Corrosion Resistance ◽  
Nickel Aluminum Bronze

The marine propeller is regarded as critical component with regard to the performance of the ships and torpedoes. Traditionally marine propellers are made of manganese-nickel-aluminum-bronze (MAB) or nickel-aluminum-bronze (NAB) for superior corrosion resistance, high-yield strength, reliability, and affordability. Since the composite materials can offer the potential benefits of reduced corrosion and cavitation damage, improved fatigue performance, lower noise, improved material damping properties, and reduced lifetime maintenance cost, Many researches on the application of the composite materials for marine propeller had been conducted. In this work, the INSEAN 1619 large screw 7 bladed propeller is analyzed, to explore the hydrodynamic and structural performance of composite materials effect on propeller’s performances, The commercial software ANSYS Workbench was used in this research. The coupled FSI method was used to analysis the dynamic performance of INSEAN 1619 large screw 7 bladed propeller made of different materials. The simulation results show that the effect of fluid–structure interaction in the analysis of flexible composite propellers should be considered.

scholarly journals Soft particle model for block copolymers

2007 ◽  
Vol 127 (13) ◽  
pp. 134905 ◽  
Author(s):  
F. Eurich ◽  
A. Karatchentsev ◽  
J. Baschnagel ◽  
W. Dieterich ◽  
P. Maass
Keyword(s):  
Block Copolymers ◽  
Particle Model ◽  
Soft Particle

Soft elastomeric composite materials with skin-inspired mechanical properties for stretchable electronic circuits

Lab on a Chip ◽  
2019 ◽  
Vol 19 (16) ◽  
pp. 2709-2717 ◽  
Author(s):  
Kuikui Zhang ◽  
Shixiao Kong ◽  
Yanyan Li ◽  
Minghui Lu ◽  
Desheng Kong
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Electronic Circuit ◽  
Electronic Circuits ◽  
Mechanical Responses

An elastomeric composite material with skin-like mechanical responses and spatially heterogeneous rigidity is developed to accommodate stretchable electronic circuit systems.

Microstructural Studies of (Ba0.7Sr0.3Fe12O19)1-x - (Ba0.7Sr0.3TiO3)x with x = 0.2, x = 0.5 and x = 0.8 Composite System by Mechanical Alloying Process

2014 ◽  
Vol 896 ◽  
pp. 391-395
Author(s):  
Novizal ◽  
Azwar Manaf ◽  
P. Sardjono
Keyword(s):  
Particle Size ◽  
Composite Materials ◽  
Mechanical Alloying ◽  
Crystallite Size ◽  
Composite System ◽  
Milling Time ◽  
X Ray ◽  
Mean Particle Size ◽  
The Mean ◽  
Composite Samples

In this paper, we report our investigation on material structure analysis of (Ba0.7Sr0.3Fe12O19)1-x-(Ba0.7Sr0.3TiO3)x with x = 0.2, x = 0.5 and x = 0.8 composite system prepared by a mechanical alloying process to promote feroic properties. It is shown that the x-ray diffraction patterns of each composition for the composite materials are the same. It consisted of the mixture for the two phases. The average of particle size for each respective phase in the composite materials was found initially increased, up to 18-20 μm after mechanically milled for 40 hours, then start to decreased to a smaller size ~ 8-10 μm after 80 hrs milling time. However, a plot of particle size against the milling time for each composite phase shown a trend of further reduction in the mean particle sizes. In addition, the x-ray traces of dense pellet samples after sintering the milled powders at a temperature of 1100 °C showed broadened diffracted peaks pattern due to fine crystallites in the samples. Results of mean crystallite size determination of respective phases in the composite samples showed the same trend, a decrease with milling time toward values about 10 nm at 80 hrs milling time. Hence, sintering to the milled particles has promoted the formation of nanocrystal containing particles. When compared between the mean particle size and mean crystallite size of respective phase in the composite samples, the mean crystallite size for magnetic phase (B7S3F) was found more than 100 times smaller than the mean particle size of composite particles. However, finer mean crystallite sizes were found in the ferroelectric phase (B7S3T) in which the mean was about 200 times smaller than the mean particle size.

Microwave Properties of Composite Ba0.5Sr0.5Fe11.7Mn0.15Ti0.15O19/La0.7Ba0.3MnO3 Material

2014 ◽  
Vol 896 ◽  
pp. 440-443 ◽  
Author(s):  
Viktor Vekky Ronald Repi ◽  
Azwar Manaf ◽  
Bambang Soegiono
Keyword(s):  
Composite Materials ◽  
Ball Mill ◽  
Composite System ◽  
Lanthanum Manganite ◽  
Strontium Hexaferrite ◽  
Frequency Range ◽  
Crystalline Materials ◽  
Barium Strontium ◽  
Wide Range ◽  
Absorbing Material

Mn-Ti substituted Barium - Strontium Hexaferrite and Barium – Lanthanum Manganite both well established materials which have been shown poses microwave absorbtion properties. As the properties of composite system are a composition sensitive, composite materials must be properly designed to meet a specific application. In this paper, we report our recent investigation on microwave absorbtion properties of composite Ba0.5Sr0.5Fe11.7Mn0.15Ti0.15O19/La0.7Ba0.3MnO3system. Composite components respectively Ba0.5Sr0.5Fe11.7Mn0.15Ti0.15O19and La0.7Ba0.3MnO3were prepared through mechanical alloying route employing a planetary ball mill for 20 hrs. The two milled powders were sintered at a temperature 1100 °C for 10 hours to ensure the crystallization towards fully crystalline materials. Composites with 2 different compositions were studied by FTIR and VNA from which results were compared with that of each component. Results of the investigation concluded that, the composite of Ba0.5Sr0.5Fe11.7Mn0.15Ti0.15O19/La0.7Ba0.3MnO3system is a good microwave absorbing material in the frequency range 9 GHz-15 GHz, particularly, sample with coded A03B07 has a wide range frequencies absorption.

Comparison of the Method of Cells With the Mori-Tanaka in Predicting Damaged Elasto-Plastic Behavior of Laminated Composite Materials

2001 ◽  
Author(s):  
Babur Deliktas ◽  
George Z. Voyiadjis
Keyword(s):  
Composite Materials ◽  
Mechanical Behavior ◽  
Composite System ◽  
Constitutive Models ◽  
Laminated Composite ◽  
Uniaxial Loading ◽  
Plastic Behavior ◽  
Strain Concentration ◽  
Laminated Composite Materials

Abstract Two commonly used micromechanical methods, namely the method of cell and the Mori-Tanaka averaging scheme are compared in this work. Their performance is evaluated in the reference to the mechanical behavior of the composite materials. Their respective homogenization schemes are compared and evaluated through the respective strain concentration tensors that are governed by these models. The damaged elasto plastic behavior of the laminated composite system (90)(8s) and (0/90)(4s) are analyzed and compared for the two methods for the case of uniaxial loading. The Lagoudas et. a (1991) modification of the Mori-Tanaka scheme as applied to elasto-plastic constitutive models is used in this work.

Effect of LPS Removal on Electrophoretic Softness of Acidithiobacillus ferrooxidans Cells

2007 ◽  
Vol 20-21 ◽  
pp. 341-344
Author(s):  
M.N. Chandraprabha ◽  
Jayant M. Modak ◽  
K.A. Natarajan
Keyword(s):  
Cell Surface ◽  
Acidithiobacillus Ferrooxidans ◽  
Ionic Concentration ◽  
Particle Model ◽  
Soft Particle ◽  
Bacterial Cells ◽  
Particle Theory ◽  
Particle Characteristics ◽  
Smoluchowski Theory ◽  
I Cells

Applicability of Ohshima’s soft-particle model to evaluate the surface potential of Acidithiobacillus ferrooxidans cells is discussed here. The electrokinetic properties were examined by electrophoretic mobility measurements and analyzed using the soft particle electrophoresis theory. As the ionic concentration increased, the mobility of the bacterial cells converged to nonzero values suggesting that the particles exhibited typical soft-particle characteristics. Also, cell surface potentials based on soft-particle theory were lower than those estimated using the conventional Smoluchowski theory. Effect of removal of LPS from the cell surface on surface softness and charge density are investigated and discussed.

Numerical Simulation on Penetration Properties of Concrete Based on Random Particle Model

2012 ◽  
Vol 446-449 ◽  
pp. 3774-3777
Author(s):  
Yun Peng ◽  
Yu Fu ◽  
Xiao Ling Liu ◽  
Jun Lin Tao ◽  
Yong Yao
Keyword(s):  
Random Function ◽  
Shock Loading ◽  
Strong Shock ◽  
Dynamic Mechanical Properties ◽  
Particle Model ◽  
Dynamic Mechanical ◽  
Mechanical Responses ◽  
Protection Engineering ◽  
Random Particle ◽  
Engineering Protection

As an important building material, concrete is widely used in military and civil areas for its superiorities, such as civil engineering, hydraulic engineering, protection engineering and so on. It is necessary to research its dynamic mechanical properties under strong shock loading. The concrete is considered as a composite material which is made of aggregate particles and cement paste from micromechanical angle. This paper uses random function to establish random particle model and simulates dynamic mechanical responses of concrete under strong shock loading based on random particle model using ANSYS/LS-DYNA.

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