Safety CAE Finite Element Calculation for Pressure Cooker of Plateau Field Kitchen Unit

2013 ◽  
Vol 341-342 ◽  
pp. 501-505
Author(s):  
Han Yang ◽  
Lu Hui Wang ◽  
Ying Ze Wang ◽  
Xiang Hong Zhang ◽  
Xue Qiang Liu
Keyword(s):  
Structural Design ◽  
Small Scale ◽  
Manufacturing Cost ◽  
Element Calculation ◽  
Working Pressure ◽  
Cooking Process ◽  
Modeling Analysis ◽  
Safety And Reliability ◽  
Speed Up ◽  
Strength And Stiffness

The core equipment of plateau field kitchen unit is pressure cooker for staple food, the safety and reliability of which are the key of this project, and therefore, mechanics modeling analysis is carried out. The working theory of pressure cooker is to increase the boiling point of water by enhancing the pressure inside the cooker, so as to speed up the cooking process. In fact, the pressure cooker is a small-scale pressure container when using, normally its working pressure reaches some tens and hundreds Kpa. People pay more attention to its safety and dependability. The traditional way to increase the bearing capacity of container is usually to thicken the wall of container, by doing so, not only the manufacturing cost is increased, but also the weight, thus it is inconvenience in using and bringing. Therefore, in order to make optimum structural design of pressure cooker, reliable analysis on mechanical strength and stiffness are carried out.

scholarly journals PyroMEMS as Future Technological Building Blocks for Advanced Microenergetic Systems

Micromachines ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 118
Author(s):  
Jean-Laurent Pouchairet ◽  
Carole Rossi
Keyword(s):  
Building Block ◽  
Building Blocks ◽  
Small Scale ◽  
Technological Evolution ◽  
Research Groups ◽  
Function Block ◽  
The Past ◽  
New Methods ◽  
Safety And Reliability ◽  
Electronically Controllable

For the past two decades, many research groups have investigated new methods for reducing the size and cost of safe and arm-fire systems, while also improving their safety and reliability, through batch processing. Simultaneously, micro- and nanotechnology advancements regarding nanothermite materials have enabled the production of a key technological building block: pyrotechnical microsystems (pyroMEMS). This building block simply consists of microscale electric initiators with a thin thermite layer as the ignition charge. This microscale to millimeter-scale addressable pyroMEMS enables the integration of intelligence into centimeter-scale pyrotechnical systems. To illustrate this technological evolution, we hereby present the development of a smart infrared (IR) electronically controllable flare consisting of three distinct components: (1) a controllable pyrotechnical ejection block comprising three independently addressable small-scale propellers, all integrated into a one-piece molded and interconnected device, (2) a terminal function block comprising a structured IR pyrotechnical loaf coupled with a microinitiation stage integrating low-energy addressable pyroMEMS, and (3) a connected, autonomous, STANAG 4187 compliant, electronic sensor arming and firing block.

Lateral Load Performance of Panelized Wood I-Joist Floor Systems

2020 ◽  
Vol 70 (4) ◽  
pp. 428-438
Author(s):  
Sigong Zhang ◽  
Ying Hei Chui ◽  
David Joo
Keyword(s):  
Load Transfer ◽  
Mechanical Performance ◽  
Small Scale ◽  
Construction Time ◽  
Plane Shear ◽  
Floor Systems ◽  
Diaphragm Action ◽  
Wood Frame ◽  
Strength And Stiffness ◽  
Frame Construction

Abstract Panelized light wood frame construction is becoming more popular due to the faster construction time and shortage of onsite skilled labor. To use light wood frame panels effectively in panelized floor systems, panel-to-panel joints must be fastened adequately to allow load transfer between panels. They must also possess in-plane shear strength and stiffness comparable to stick-built, staggered-sheathed assemblies. This study was designed to develop efficient and effective panel-to-panel joints for connecting adjacent floor panels built with wood I-joists and evaluate the efficiency of the joints in achieving diaphragm action. At first, a number of these panel-to-panel joints were tested in the laboratory using a small-scale diaphragm test setup to determine their efficiency in transferring in-plane forces between panels. Test results showed that a small decrease in in-plane stiffness was expected for the most effective joints, but their strengths were significantly higher than at the same location in a conventional site-built floor diaphragm. The presence of blockings and use of two-row nailing were found to considerably improve stiffness and strength. These features can be used to mitigate the potential reduction in mechanical performance of panelized floor construction, in comparison with the site-built wood I-joist floor.

Development of a Hypersonic Aircraft Design Optimization Tool

2014 ◽  
Vol 553 ◽  
pp. 847-852 ◽  
Author(s):  
Benjamin J. Morrell ◽  
David J. Munk ◽  
Gareth A. Vio ◽  
Dries Verstraete
Keyword(s):  
Structural Design ◽  
Current Practice ◽  
Thermal Stresses ◽  
Aircraft Design ◽  
Material Strength ◽  
Aircraft Structure ◽  
Aerodynamic Loads ◽  
Design And Optimization ◽  
Hypersonic Aircraft ◽  
Strength And Stiffness

The design and optimization of hypersonic aircraft is severely impacted by the high temperatures encountered during flight as they can lead to high thermal stresses and a significant reduction in material strength and stiffness. This reduction in rigidity of the structure requires innovative structural concepts and a stronger focus on aeroelastic deformations in the early design and optimisation of the aircraft structure. This imposes the need for a closer coupling of the aerodynamic and structural design tools than is current practice. The paper presents the development of a multi-disciplinary, closely coupled optimisation suite for hypersonic aircraft. An overview of the setup and structure of the optimization suite is given and the integration between the Tranair solver, used to determine the aerodynamic loads and temperatures, and MSC/NASTRAN, used for the structural sizing and design, will be given.

scholarly journals Primary Survey and Structural Design of Lamella Clarifier Based Water Treatment Plant for Raigarh City

2021 ◽  
Vol 9 (VIII) ◽  
pp. 69-75
Author(s):  
Avinash Panda
Keyword(s):  
Water Treatment ◽  
Chemical Treatment ◽  
Structural Design ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Natural Process ◽  
Primary Survey ◽  
Speed Up

It is necessary to utilize a clarifier when the wastewater contains a significant amount of particles that must be filtered out. It works by allowing particles to fall to the bottom of a plate and flow freely past as they settle. Adding polyelectrolyte and coagulant may speed up this natural process of settling. In contrast, coagulants neutralize charges and conglomerate solids into micro-flocs as a result of the polyelectrolyte. Fine filtration, assisted by the use of lamella clarifier settler, or the use of microorganisms, which consume organics as a source of energy, are two common methods of chemical treatment.

A Performance Comparison of Three Micro-Sized Blade Rotor Designs for Malaysia Wind Speed Condition

2015 ◽  
Vol 785 ◽  
pp. 310-314 ◽  
Author(s):  
Norzanah Rosmin ◽  
N.A. Rahman ◽  
A.H. Mustaamal
Keyword(s):  
Electrical Power ◽  
Vertical Axis ◽  
Performance Comparison ◽  
Power Coefficient ◽  
Small Scale ◽  
Experimental Setup ◽  
Wind Speeds ◽  
Vertical Axis Wind Turbines ◽  
Speed Up ◽  
Electrical Generation

Vertical-Axis Wind Turbines (VAWTs) are known as the most suitable wind turbine for small-scale electrical generation. There are many types of VAWTs and each of it has different performances and efficiency. In this work, three types of VAWT systems (Savo-B2, Savo-B4 and Giro-B3) were designed, constructed and tested to investigate the amount of electrical power that could be generated under several constant wind speeds. The blade rotors were designed and built using 2 mm thickness of aluminum plate. The tip speed ratios, power coefficients, blade rotations for each blade rotor and the simplicity of the proposed designs were studied via an experimental setup. The experimental work demonstrates that Savo-B2 provides the highest power coefficient which is up to 0.32. Meanwhile, Giro-B3 offers the fastest rotational blade speed, up to 20.53 rad/s, among the three designs.

scholarly journals Buckling Analysis of an AUV Pressure Vessel with Sliding Stiffeners

2020 ◽  
Vol 8 (7) ◽  
pp. 515 ◽  
Author(s):  
Artur Siqueira Nóbrega de Freitas ◽  
Alexander Alfonso Alvarez ◽  
Roberto Ramos ◽  
Ettore Apolonio de Barros
Keyword(s):  
Cylindrical Shell ◽  
Residual Stresses ◽  
Structural Design ◽  
Autonomous Underwater Vehicle ◽  
Underwater Vehicle ◽  
Manufacturing Cost ◽  
Buckling Loads ◽  
Buckling Resistance ◽  
High Hydrostatic Pressures ◽  
Innovative Concept

The structure of an autonomous underwater vehicle (AUV), usually composed of a cylindrical shell, may be exposed to high hydrostatic pressures where buckling collapse occurs before yield stress failure. In conventional submarines, welded stiffeners increase the buckling resistance, however, in small AUVs, they reduce the inner space and cause residual stresses. This work presents an innovative concept for the structural design of an AUV, proposing the use of sliding stiffeners that are part of the structure used to accommodate the electronics inside it. Since the sliding stiffeners are not welded to the shell, there are no residual stresses due to welding, the AUV fabrication process is simplified, enabling a reduction of the manufacturing cost, and the inner space is available to accommodate the equipment needed for the AUV mission. Moreover, they provide a higher buckling resistance when compared to that of an unstiffened cylindrical shell. A comparative analysis of the critical buckling loads for different shell designs was carried out considering the following: (i) the unstiffened shell, (ii) the shell with ring stiffeners, and (iii) the shell with sliding stiffeners. Results evidenced that major advantages were obtained by using the latter alternative against buckling.

Structural Design for the Development of the Floating Type Photovoltaic Energy Generation System

2010 ◽  
Vol 654-656 ◽  
pp. 2803-2806 ◽  
Author(s):  
Hoon Choi ◽  
Hyung Joong Joo ◽  
Jeong Hun Nam ◽  
Kyoung Soo Kim ◽  
Soon Jong Yoon
Keyword(s):  
Structural Design ◽  
Energy Generation ◽  
Structural Members ◽  
Generation System ◽  
Element Analysis ◽  
Photovoltaic Energy ◽  
Specific Strength ◽  
Strength And Stiffness ◽  
Floating Type ◽  
Structural Behaviors

In this paper, we present the structural design for the development of the floating type photovoltaic energy generation system using pultruded FRP members. Pultruded FRP has superior material properties compared with those of conventional structural materials. Especially, pultruded FRP has an excellent corrosion-resistance along with high specific strength and stiffness, which are highly appreciated for the design and fabrication of the floating type photovoltaic energy generation system. In the paper, investigations pertaining to the mechanical and structural behaviors of FRP structural members based on the experiments are discussed. In addition to the experimental investigation, finite element analysis of the floating type photovoltaic energy generation system composed of pultruded FRP structural shapes has been performed. Finally, we have designed and developed the floating type photovoltaic energy generation system using the results of investigations.

Finite Element Analysis and Optimization for the Structure of NC Forming Machine

2014 ◽  
Vol 945-949 ◽  
pp. 166-173
Author(s):  
Li Min Liu ◽  
Zhong De Shan ◽  
Feng Liu
Keyword(s):  
Finite Element ◽  
Structural Design ◽  
Numerical Control ◽  
Fundamental Function ◽  
Element Analysis ◽  
Main Structure ◽  
Overall Design ◽  
Safety And Reliability ◽  
Processing Module ◽  
Finite Element Numerical Simulation

Numerical control (NC, for short) forming machine is kind of digital forming equipment, which is based on the development of manufacturing technology without pattern, and can get mold by processing module directly, and its mechanical structure is mainly composed of the main structure, moving system, tool system and other components. The main structure is not only the foundation and framework of the entire machine, but also the most important component bearing pressure. The moving system is the most critical part of forming machine to achieve its fundamental function. Therefore, the design and development of the main structure and moving system have directly impact on the performance and service life of the forming machine, which is an important factor to reflect the level of the overall design. In this paper, structural static analysis of the main structure and moving system was made through finite element numerical simulation, the more reasonable scheme was optimized, by which the safety and reliability of forming machine was ensured. The research results can provide the necessary technical support for the structural design of NC forming machine.

The Track Structural Design and Finite Element Analysis of the Track Type Thinning Shredder

2012 ◽  
Vol 490-495 ◽  
pp. 2888-2892
Author(s):  
Yan Wu ◽  
Yan Ma
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Design ◽  
Three Dimensional ◽  
Soft Ground ◽  
Mechanical Motion ◽  
Element Analysis ◽  
Development Cycle ◽  
Speed Up ◽  
Forestry Industry

Using the powerful parametric features of Pro/E modeling for the assembly of the track board, and building up Three-dimensional solid modeling. Finite element analysis with the simulation of mechanical motion to simulate the track through the soft ground of the forest were carried out. It can significantly reduce the design costs and speed up the development cycle to adapt of the requirements of the modern forestry industry.

scholarly journals Examining the Application of Mobile Phone in Business Practice Among Small Scale Businesses in Tamale Metropolis

2020 ◽  
Vol 8 (4) ◽  
pp. 11-30
Author(s):  
ABDUL-RAZAK ABUBAKARI
Keyword(s):  
Mobile Phone ◽  
Quantitative Research ◽  
Target Population ◽  
Business Practice ◽  
Small Scale ◽  
Research Approach ◽  
Technological Changes ◽  
Mobile Money ◽  
Tamale Metropolis ◽  
Speed Up

This research examined the application of mobile phone in business practice among small scale businesses in Tamale metropolis. A quantitative research approach was adopted and the target population was users of mobile money application among Small Scale Businesses in Tamale Metropolis. The general objective of the study is to examining the application of mobile phones in business practice among Small Scale Businesses in Tamale metropolis. It is found out by the researcher that usually people use it to transact business that is making and receiving money as payment. Hence, it is established that mobile phone gives them opportunity to keep records as evidence. The research revealed that, mobile money is noted to facilitate and speed up transaction of businesses. Also, it is found out that, it enhances convenience of handling resources effectively. It is established that, monies in the mobile phone are safer and remain safe even if the mobile device is lost. It is clearly indicated that many people lose their monies every now and then from fraudsters through the introduction of mobile money. The study shows that technological changes are some of the factors Small Scale Businesses faced. To optimize the benefits to be realized from mobile money application in businesses, there is the need to overcome the challenges of the application among small scale businesses.  

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