Dynamics of plastic composite structures

1981 ◽  
Vol 16 (5) ◽  
pp. 577-581
Author(s):  
A. R. Skovoroda ◽  
G. S. Shapiro
Keyword(s):  
Composite Structures ◽  
Plastic Composite

Composite Underrail Basements. Constructions

2020 ◽  
Vol 785 (10) ◽  
pp. 52-76
Author(s):  
V.I. KONDRASHCHENKO ◽  
◽  
A.V. SAVIN ◽  
Chuang WANG ◽  
◽  
...  
Keyword(s):  
Composite Structures ◽  
Environmental Crisis ◽  
Structural Defects ◽  
Practical Implementation ◽  
Railway Transport ◽  
Plastic Composite ◽  
Polymer Binders ◽  
Railway Industry ◽  
History Of ◽  
Traditional Structures

The article summarizes the world experience in the use of sub-rail bases (sleepers, bridge and switch ties), including their traditional structures made of wood, steel and reinforced concrete, as well as innovative composite structures (plastic, composite) based on polymer binders. The types of structures of composite sub-rail bases that have found application or are at the stage of practical implementation, their features of operation on the railway, the types of fasteners used, as well as typical defects of such structures are generalized. A classification of structures of composite sub-rail bases is proposed. The history of evolution and trends in their development, which can serve as a valuable guide for optimizing structures, expanding their production and application in railway transport, are discussed. Based on the analysis of more than 120 literature sources, it is concluded about the advantages of composite sub-rail bases in technical, economic and environmental aspects as the resource and environmental crisis worsens, in which the use of composite sub-rail bases becomes a promising direction for the development of the railway industry. Keywords: structures of composite sub-rail bases, types of fasteners used, structural defects, railway tracks, sleepers, railway transport.

scholarly journals Polymer-based Modular Residential Building Design and Construction äóñ A new Paradigm?

2016 ◽  
Author(s):  
Andy Wong ◽  
Pierre Mertiny
Keyword(s):  
Composite Structures ◽  
Economies Of Scale ◽  
Residential Buildings ◽  
Low Cost ◽  
Building Design ◽  
Synthetic Fiber ◽  
Core Material ◽  
New Paradigm ◽  
Plastic Composite ◽  
Wood Frame

The onsite wood frame method of constructing new buildings has been the norm for residential and basic commercial structures for more than a century. In this review study, we consider investment into plastic composite structures to supplement or replace wood frame home construction. Previous developments in this field often centralize on using a classic composite sandwich panel design: a polymer-based core material adjoined to layers of synthetic fiber-reinforced polymer (e.g. fiberglass). The core of the composite panels is designed to meet demands toward low cost, light weight, and structural rigidity. Different varieties of plastics, including thermosets and thermoplastics, are discussed. Factors that need to be considered in the fabrication of composite modular residential buildings include, but are not limited to, energy consumption (both in building heating and cooling, and fabrication energy usage), fire resistance, resource use, environmental impact, human impact, and cost. Basic fabrication principles and techniques for composite modular panels are reviewed, wherein mechanical and electrical work can be incorporated into the building during panel manufacturing. Methods in which panels can be fabricated in high volumes that enable economies of scale are described. Thusly, recent progress in the application of plastics forming and machining that is applicable to the construction industry, and the feasibility of this type of residential construction are elucidated and discussed holistically.

Process Combination of Hydroforming and Injection Moulding for the In Situ Manufacturing of Metal and Plastic Composite Structures

2015 ◽  
Vol 825-826 ◽  
pp. 522-529 ◽  
Author(s):  
André Albert ◽  
Welf Guntram Drossel ◽  
Wolfgang Zorn ◽  
Wolfgang Nendel ◽  
Dirk Raithel
Keyword(s):  
Injection Molding ◽  
Deep Drawing ◽  
Injection Moulding ◽  
Composite Structures ◽  
Adhesion Promoter ◽  
Moulding Process ◽  
Plastic Composite ◽  
Injection Moulding Process ◽  
Plastic Parts ◽  
Process Combination

The use of lightweight structures is a major trend in the reduction of fuel consumption and CO2 emissions, especially in transport. Metal plastic hybrid structures are an efficient solution to use the best material at every point in the design space. In the state of the art production technologies, the metal parts are produced separately from the plastic parts. The injection moulding process is only used for forming the plastic parts and for joining. These process chains are very extensive. The article shows the development of new process combinations. The aim is a combination of metal forming and injection moulding in one die and one process. One part should be produced with every single stroke of the press.In the first step, deep drawing, injection molding and media based forming with the plastic melt were successfully merged in one tool and one process. It was possible to integrate the injection moulding process into a deep drawing machine. In the next step, it was possible to successfully combine hydroforming and injection molding. For this process combination the hydroforming process is integrated into an injection moulding press. Different surface structures of the metal tubes, such as sandblasting, knurling and laser structuring, were systematically tested regarding to their properties as an adhesion promoter. The target is to establish a purely mechanical connection between the hydroformed metal component and the injection moulded component from glass fibre reinforced plastic instead of the chemical bonding agents often used previously, such as Vestamelt®.

In Situ microscopy of the anodic etching of silicon

1995 ◽  
Vol 53 ◽  
pp. 232-233
Author(s):  
Frances M. Ross ◽  
Peter C. Searson
Keyword(s):  
Composite Structures ◽  
High Surface ◽  
High Surface Area ◽  
Chemical Properties ◽  
Selective Etching ◽  
Silicon On Insulator ◽  
Second Phase ◽  
Porous Layers ◽  
New Class ◽  
Porous Semiconductors

Porous semiconductors represent a relatively new class of materials formed by the selective etching of a single or polycrystalline substrate. Although porous silicon has received considerable attention due to its novel optical properties1, porous layers can be formed in other semiconductors such as GaAs and GaP. These materials are characterised by very high surface area and by electrical, optical and chemical properties that may differ considerably from bulk. The properties depend on the pore morphology, which can be controlled by adjusting the processing conditions and the dopant concentration. A number of novel structures can be fabricated using selective etching. For example, self-supporting membranes can be made by growing pores through a wafer, films with modulated pore structure can be fabricated by varying the applied potential during growth, composite structures can be prepared by depositing a second phase into the pores and silicon-on-insulator structures can be formed by oxidising a buried porous layer. In all these applications the ability to grow nanostructures controllably is critical.

A Numerical and Experimental Approach for Modeling Porosity Due to Entrapped Air and Volatiles Off-gassing During Manufacturing of Composite Structures

2019 ◽  
Author(s):  
Curtis Hickmott ◽  
Alireza Forghani ◽  
Victoria Hutten ◽  
Evan Lorbiecki ◽  
Frank Palmieri ◽  
...  
Keyword(s):  
Composite Structures ◽  
Experimental Approach ◽  
Entrapped Air
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