Composite helical spring with s kin‐core structure: Structural design and compression property evaluation

2020 ◽  
Author(s):  
Qian Jiang ◽  
Ye Qiao ◽  
Feng Zhao ◽  
Zhongxiang Pan ◽  
Xianyan Wu ◽  
...  
Keyword(s):  
Structural Design ◽  
Core Structure ◽  
Helical Spring ◽  
Compression Property ◽  
Property Evaluation

Structural Design and Analysis of the Toroidal Heliostat

2010 ◽  
Vol 132 (4) ◽  
Author(s):  
Chuncheng Zang ◽  
Zhifeng Wang ◽  
Wenfeng Liang ◽  
Xiaoyu Wang
Keyword(s):  
Structural Design ◽  
Mechanical Performance ◽  
Great Influence ◽  
The Sun ◽  
Optical Performance ◽  
The Finite Element Method ◽  
Advantages And Disadvantages ◽  
Property Evaluation ◽  
Solar Power Tower ◽  
The Cost

Heliostat is an important component in the solar power tower station because its cost, optical performance, and mechanical performance have great influence on the overall property evaluation of the station. The T-shape heliostat tracking the sun in the azimuth-elevation mode has been commonly developed and successfully applied in many stations. In recent years, some researchers have developed spinning-elevation heliostats and have analyzed their optical performance. In this paper, the structure of a 16 m2 toroidal heliostat tracking the sun in the spinning-elevation mode is designed, and the mechanical performance of the structure under wind load is analyzed by means of the finite element method. The trends of force, moments, and vibration modes with the change in elevation have been presented, and the classic status is analyzed in detail when their maximum values occur. Furthermore, the advantages and disadvantages of a toroidal heliostat in reducing the cost are discussed compared with those of a traditional T-shape heliostat.

Spacer fabric-based exuding wound dressing – Part I: Structural design, fabrication and property evaluation of spacer fabrics

2016 ◽  
Vol 87 (12) ◽  
pp. 1469-1480 ◽  
Author(s):  
Yadie Yang ◽  
Hong Hu
Keyword(s):  
Structural Design ◽  
Wound Dressing ◽  
Air Permeability ◽  
Fabric Structure ◽  
Property Evaluation ◽  
Spacer Fabric ◽  
Water Vapor Transmission ◽  
Different Types ◽  
New Type ◽  
Spacer Fabrics

Exuding wound dressing is used to help wound healing. Currently, commercial dressings for heavily exuding wounds still have some drawbacks, such as poor integrity, poor air permeability, low water vapor transmission, and the need for a secondary dressing on the top. To overcome these drawbacks, a new type of wound dressing based on the three-layer spacer fabric structure is proposed in this study. The study includes two parts. The first part focuses on the design, fabrication, and property evaluation of spacer fabrics that can be used for wound dressing. Twelve different types of spacer fabrics were first fabricated. Then, different properties, including wettability, absorbency, permeability, and thermal insulation, were tested and evaluated. A statistical analysis was also conducted to evaluate the effects of structural and yarn parameters on the properties of the spacer fabrics. Based on the testing results, two suitable spacer fabrics were finally selected as the basis for wound dressing material. It is expected that this study could promote the application of spacer fabrics in the medical area.

Structural design of face fabrics and the core as a premise for compression behavior of 3D woven sandwich fabric

2016 ◽  
Vol 20 (6) ◽  
pp. 718-734 ◽  
Author(s):  
Tatjana V Mihailovic ◽  
Koviljka A Asanovic ◽  
Dragana D Cerovic
Keyword(s):  
Structural Design ◽  
Woven Fabrics ◽  
Core Structure ◽  
Compact Structure ◽  
Compression Behavior ◽  
The Core ◽  
Compression Properties ◽  
Woven Structures ◽  
Structural Parts ◽  
3D Woven Fabrics

In this work, an experimental study on compression properties of two E-glass 3D woven fabrics, known as integrally woven sandwich fabrics, has been presented. Compression properties of 2D face fabrics and the core, as structural parts of integrally woven sandwich fabric, have also been investigated. Compression behavior of the samples (compressibility, compression work, and compressive resilience) was analyzed from the aspect of the weave design of face fabrics and the core structure (shape and density of the pile yarns). Results of the investigation showed that “8” shaped core structure, the greater surface density of the pile yarns, and the less compact structure of face fabrics ensure better compression properties of 3D fabrics. Specific weave design of face fabrics and the structure of the core significantly influence the behavior of 3D fabrics during successive increases, followed by a gradual decrease of pressure. During the loading of 3D woven structures, three regions of curves can clearly be seen compared to two regions which are registered at 2D face fabrics. Concerning 3D woven fabrics, the first region represents compression of the core, the second region is prolonged core compression and the third region refers to the simultaneous compression of pile yarns in the core and face fabrics. The density of pile yarns plays an important role in the region 1. In region 2, both the shape and density of the pile yarns are significant. Influence of the weave of face fabrics on compression behavior of 3D fabric can be noticed to a lesser extent in the region 2 and, especially in the region 3, where highly packed yarns assemblies are created.

NiAl precipitation in Fe-12w/o Cr-5w/o Ni-4w/o Al

1983 ◽  
Vol 41 ◽  
pp. 202-203
Author(s):  
L.E. Murr ◽  
J.S. Dunning ◽  
S. Shankar
Keyword(s):  
Solid Solution ◽  
Stainless Steel ◽  
Stainless Steels ◽  
Alloy Composition ◽  
Chromium Content ◽  
Scale Up ◽  
Optical Metallography ◽  
Property Evaluation ◽  
310 Stainless Steel ◽  
Microstructural Studies

Aluminum additions to conventional 18Cr-8Ni austenitic stainless steel compositions impart excellent resistance to high sulfur environments. However, problems are typically encountered with aluminum additions above about 1% due to embrittlement caused by aluminum in solid solution and the precipitation of NiAl. Consequently, little use has been made of aluminum alloy additions to stainless steels for use in sulfur or H2S environments in the chemical industry, energy conversion or generation, and mineral processing, for example.A research program at the Albany Research Center has concentrated on the development of a wrought alloy composition with as low a chromium content as possible, with the idea of developing a low-chromium substitute for 310 stainless steel (25Cr-20Ni) which is often used in high-sulfur environments. On the basis of workability and microstructural studies involving optical metallography on 100g button ingots soaked at 700°C and air-cooled, a low-alloy composition Fe-12Cr-5Ni-4Al (in wt %) was selected for scale up and property evaluation.

CORE STRUCTURE OF 90° PARTIAL DISLOCATIONS IN DIAMOND

1983 ◽  
Vol 44 (C4) ◽  
pp. C4-37-C4-42 ◽  
Author(s):  
K. W. Lodge ◽  
A. Lapiccirella ◽  
N. Tomassini ◽  
S. L. Altmann
Keyword(s):  
Core Structure ◽  
Partial Dislocations

CORE STRUCTURE OF CSL BOUNDARIES IN NiO

1988 ◽  
Vol 49 (C5) ◽  
pp. C5-251-C5-256 ◽  
Author(s):  
K. L. MERKLE ◽  
J. F. REDDY ◽  
C. L. WILEY ◽  
D. J. SMITH
Keyword(s):  
Core Structure

The Development of Structural Design and the Selection of Design Parameters of Aerodynamic Systems for De-orbiting Upper-stage Rocket Launcher

2017 ◽  
Vol 13 (4) ◽  
pp. 29-39 ◽  
Author(s):  
A.P. Alpatov ◽  
◽  
O.S. Palii ◽  
О.D. Skorik ◽  
◽  
...  
Keyword(s):  
Structural Design ◽  
Design Parameters ◽  
Upper Stage ◽  
Selection Of

High-Precision Positioning of Galvano Scanners by Structural Design Using Node of Vibration Modes

2011 ◽  
Vol 131 (3) ◽  
pp. 275-282
Author(s):  
Kenta Seki ◽  
Hiroaki Matsuura ◽  
Makoto Iwasaki ◽  
Hiromu Hirai ◽  
Soichi Tohyama
Keyword(s):  
High Precision ◽  
Structural Design ◽  
Vibration Modes ◽  
Precision Positioning

Structural Design of Office Building

PCI Journal ◽  
1965 ◽  
Vol 10 (1) ◽  
pp. 91-94
Author(s):  
Felix Kulka
Keyword(s):  
Structural Design ◽  
Office Building

Influence of the distribution of the shear walls on the seismic response of the buildings

2020 ◽  
Vol 15 (1) ◽  
pp. 37-44
Author(s):  
El Mehdi Echebba ◽  
Hasnae Boubel ◽  
Oumnia Elmrabet ◽  
Mohamed Rougui
Keyword(s):  
Structural Analysis ◽  
Seismic Response ◽  
Natural Frequency ◽  
Structural Design ◽  
Structural Response ◽  
Shear Walls ◽  
Structural Elements ◽  
Analysis Software ◽  
Ansys Apdl ◽  
The Impact

Abstract In this paper, an evaluation was tried for the impact of structural design on structural response. Several situations are foreseen as the possibilities of changing the distribution of the structural elements (sails, columns, etc.), the width of the structure and the number of floors indicates the adapted type of bracing for a given structure by referring only to its Geometric dimensions. This was done by studying the effect of the technical design of the building on the natural frequency of the structure with the study of the influence of the distribution of the structural elements on the seismic response of the building, taking into account of the requirements of the Moroccan earthquake regulations 2000/2011 and using the ANSYS APDL and Robot Structural Analysis software.

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