Development of Low Density Glass Mat Thermoplastic Composites for Structural Applications

2001 ◽  
Author(s):  
Venkat Raghavendran ◽  
Enamul Haque
Keyword(s):  
Thermoplastic Composites ◽  
Low Density ◽  
Structural Applications ◽  
Glass Mat

Additive manufacturing of ceramics: Present status and future perspectives

2021 ◽  
Author(s):  
Mainak Saha ◽  
Manab Mallik
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Microstructure Evolution ◽  
Review Article ◽  
Low Density ◽  
Structure Property ◽  
Future Perspectives ◽  
Structural Applications ◽  
Systematic Structure ◽  
State Of Research

At present, fabrication of ceramics using AM-based techniques mainly suffers from two primary limitations, viz: (i) low density and (ii) poor mechanical properties of the finished components. It is worth mentioning that the present state of research in the avenue of AM-based ceramics is focussed mainly on fabricating ceramic and cermet components with enhanced densities and improved mechanical properties. However, to the best of the authors’ knowledge, not much is known about the microstructure evolution and its correlation with the mechanical properties of the finished parts. Addressing the aforementioned avenue is highly essential for understanding the utilisation of these components for structural applications. To this end, the present review article is aimed to address the future perspectives in this avenue has been provided with a special emphasis on the need to establish a systematic structure-property correlation in these materials.

scholarly journals Reinforcement Efficiency of Cellulose Microfibers for the Tensile Stiffness and Strength of Rigid Low-Density Polyurethane Foams

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2725 ◽  
Author(s):  
Jānis Andersons ◽  
Mikelis Kirpluks ◽  
Ugis Cabulis
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Foams ◽  
Low Density ◽  
Mechanical Reinforcement ◽  
Tensile Stiffness ◽  
Structural Applications ◽  
Cellulose Microfibers ◽  
Renewable Material ◽  
Reinforcement Efficiency ◽  
Pu Foams

Rigid low-density closed-cell polyurethane (PU) foams are widely used in both thermal insulation and structural applications. The sustainability of PU foam production can be increased by using bio-based components and fillers that ensure both enhanced mechanical properties and higher renewable material content. Such bio-based foams were produced using polyols derived from rapeseed oil and microcrystalline cellulose (MCC) fibers as filler. The effect of MCC fiber loading of up to 10 wt % on the morphology, tensile stiffness, and strength of foams has been evaluated. For estimation of the mechanical reinforcement efficiency of foams, a model allowing for the partial alignment of filler fibers in foam struts was developed and validated against test results. It is shown that although applying MCC fibers leads to modest gains in the mechanical properties of PU foams compared with cellulose nanocrystal reinforcement, it may provide a higher content of renewable material in the foams.

Investigation on Improvement of Flexural Behavior of Low-Density Cellular Concrete through Fiber Reinforcement for Non-Structural Applications

2019 ◽  
Vol 2673 (10) ◽  
pp. 641-651
Author(s):  
Arman Abdigaliyev ◽  
Jiong Hu
Keyword(s):  
Mechanical Properties ◽  
Lightweight Concrete ◽  
Construction Material ◽  
Flexural Behavior ◽  
Unit Weight ◽  
Slight Reduction ◽  
Low Density ◽  
Hybrid Fibers ◽  
Structural Applications ◽  
Cellular Concrete

During the last decades, cellular lightweight concrete (CLC), or foamed concrete, has been experiencing greater interest in geotechnical, structural, and non-structural applications. The low density and high flowability makes it a favorable construction material in relation to handling, placing, and construction costs. However, the applications of low-density cellular concrete (LDCC), the category of CLC with a unit weight less than 50 pounds per cubic foot (801 kg/m3) and generally without fine aggregates, are limited mostly to backfill applications in geotechnical engineering. The main reason lies in the brittleness of the material and low to zero resistance to flexural loads. Fiber-reinforced LDCC may be a reasonable solution to improve mechanical properties and expand the application range of the material. This study investigated the effects of adding polypropylene and hybrid fibers on physical and mechanical properties of LDCC and the feasibility of expanding LDCC utilization to non-structural applications. Results showed that although there is a slight reduction of flowability and compressive strength, the flexural behavior of LDCC can be significantly improved with the incorporation of fibers. The flexural strength and flexural toughness of LDCC was found to increase from 26.8 pounds per square inch (psi) (0.18 MPa) to 217.5 psi (1.48 MPa), and from 5.67 lb-in. (0.64 kN-mm) to 292 lb-in. (33.0 kN-mm) respectively at a 1.0% addition rate of a fibrillated polypropylene fiber selected in this study, which makes it a feasible material for non-structural applications.

scholarly journals Weight Reduction of Automobile Using Glass-Mat Thermoplastic Composites in Spare-Wheel Well

2020 ◽  
Vol 4 (1) ◽  
pp. 7-11
Author(s):  
Çiğdem BİLGE ◽  
Tamer AYDINER ◽  
Çağrı AKDENİZ ◽  
Ahmet Mert SOYER ◽  
Levent AKSEL
Keyword(s):  
Weight Reduction ◽  
Thermoplastic Composites ◽  
Glass Mat

scholarly journals Utilization of melamine impregnated paper waste as a filler in thermoplastic composites

BioResources ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. 3159-3170
Author(s):  
Fatma Bozkurt ◽  
Büşra Avci ◽  
Fatih Mengeloğlu
Keyword(s):  
Mechanical Properties ◽  
Filler Content ◽  
Wood Flour ◽  
Environmental Benefits ◽  
Thermoplastic Composites ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Composite Manufacturing ◽  
Elongation At Break ◽  
Molding Method

The potential utilization of melamine impregnated paper (MIP) waste in thermoplastic composites was investigated. Composites were also manufactured utilizing wood flour (WF) at the same filler rates for comparison. The composites were manufactured using a compression molding method. The effects of filler type and filler rate on the mechanical properties of low-density polyethylene (LDPE)-based composites were evaluated. Mechanical properties, such as tensile and flexural strengths, were determined in accordance with ASTM D638 (2001) and ASTM D790 (2003), respectively. Results showed that filler type and filler content had significant effects on all mechanical properties investigated. Both fillers improved all mechanical properties except for tensile strength and elongation at break of LDPE. In conclusion, MIP waste has a potential to be utilized in thermoplastic-based composite manufacturing and might generate some economic and environmental benefits.

Identification of a new phase in the Ai-C-B ternary by high-resolution transmission electron microscopy

1987 ◽  
Vol 45 ◽  
pp. 168-169
Author(s):  
M. Sarikaya ◽  
T. Laoui ◽  
D. L. Milius ◽  
I. A. Aksay
Keyword(s):  
Liquid Aluminum ◽  
Skeletal Structure ◽  
Low Density ◽  
Metal Composites ◽  
Transmission Electron ◽  
Structural Applications ◽  
Powder Compacts ◽  
New Phase ◽  
Unique Potential ◽  
Structure Liquid

The purpose of this note is to report the identification of a ternary (XI) phase which has been observed as a reaction product during the processing of B4C-Al composites. These ceramic-metal composites (cermets) have the unique potential for structural applications because of their low density (> 2.6 g/cc) and a desirable combination of mechanical properties. Guidelines for the processing of B4C-Al have been successfully established; and now it is possible to produce tailored microstructures with varying amounts of constituent phases.The samples for the analysis were prepared by the following procedure. First, it was necessary to heat the B4C powder compacts in excess of 2000°C to attain an interconnected B4C skeletal structure. Liquid aluminum was then infiltrated into this B4C network at 1170°C.

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