Characterization of Multiaxial Constitutive Properties of Rubbery Polymers

2006 ◽  
Vol 128 (4) ◽  
pp. 489-494 ◽  
Author(s):  
V. Chakkarapani ◽  
K. Ravi-Chandar ◽  
K. M. Liechti
Keyword(s):  
Casting Process ◽  
Shear Resistance ◽  
Monotonic Loading ◽  
Tait Equation ◽  
Confined Compression ◽  
Spray Process ◽  
Volumetric Deformation ◽  
Constitutive Properties ◽  
Bulk Response

Rubbery response of polyurea is examined under monotonic loading in the confined compression, composite compression, and Arcan shear configurations. For polyurea prepared by a casting process, it is shown that while the bulk response is significantly nonlinear, and well fitted by the Tait equation, the shear resistance is extremely small. In contrast, polyurea formed by a spray process shows significant compressibility, inelastic volumetric deformation, and significantly enhanced shear resistance.

scholarly journals Microstructure and Thermoelectric Properties of (Bi0.48Sb1.52)Te3 Thick Films Prepared with Tape Casting Method

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 140
Author(s):  
Lichen Liu ◽  
Ziping Cao ◽  
Min Chen ◽  
Jun Jiang
Keyword(s):  
Thermoelectric Properties ◽  
Low Cost ◽  
Thick Films ◽  
Tape Casting ◽  
Casting Process ◽  
Casting Method ◽  
Glass Substrates ◽  
Conductive Films ◽  
Casting Technology

This paper reports the fabrication and characterization of (Bi0.48Sb1.52)Te3 thick films using a tape casting process on glass substrates. A slurry of thermoelectric (Bi0.48Sb1.52)Te3 was developed and cured thick films were annealed in a vacuum chamber at 500–600 °C. The microstructure of these films was analyzed, and the Seebeck coefficient and electric conductivity were tested. It was found that the subsequent annealing process must be carefully designed to achieve good thermoelectric properties of these samples. Conductive films were obtained after annealing and led to acceptable thermoelectric performance. While the properties of these initial materials are not at the level of bulk materials, this work demonstrates that the low-cost tape casting technology is promising for fabricating thermoelectric modules for energy conversion.

Understanding T-Ingot Horizontal DC Casting Using Process Modelling

2006 ◽  
Vol 519-521 ◽  
pp. 1461-1466 ◽  
Author(s):  
André Larouche ◽  
Malcom Lane ◽  
Massimo DiCiano ◽  
Daan M. Maijer ◽  
Steve CockCroft ◽  
...  
Keyword(s):  
Process Model ◽  
Defect Formation ◽  
Metal Flow ◽  
Casting Process ◽  
Production Costs ◽  
Process Characteristics ◽  
Powerful Approach ◽  
Foundry Alloys ◽  
Dc Casting

Horizontal continuous casting process has been successfully implemented in Alcan for the production of T-ingots of primary aluminium and foundry alloys. Ability to achieve increased productivity targets and reduce production costs relies on a fundamental understanding of key process characteristics and operating parameters. Thanks to the long-standing experience in vertical DC Casting, numerical modelling appeared as a powerful approach to understand phenomena related to metal flow, solidification and ultimately defect formation. As part of a collaborative R&D program, a global model of horizontal casting process, integrating specialized sub-models on critical aspects of the process such as meniscus dynamics, is being developed. Experimental characterization of primary and secondary cooling is performed in parallel with modelling work to provide the information necessary to properly characterize mould heat transfer. This paper will present the development of a 3D process model of T-ingot casting along with its application to solve specific process challenges that have emerged during the first years of production in the plant.

The Mechanical Characterization of Al2O3 Reinforced AL6061 Metal Matrix Composite

2015 ◽  
Vol 766-767 ◽  
pp. 257-262
Author(s):  
P. Mohan ◽  
M. Kathirvel ◽  
N. Azhagesan ◽  
M. Sivapragash
Keyword(s):  
Fracture Toughness ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Material Characterization ◽  
Metal Matrix ◽  
Treatment Process ◽  
Mechanical Characterization ◽  
Casting Process ◽  
Stir Casting

The aluminium based composites are increasingly being used in the transport, aerospace, marine, automobile and mineral processing industries. The widely used reinforcing materials for these composites are silicon carbide, aluminium oxide and graphite in the form of particles or whiskers. In this study Al6061-6 & 4wt% Al2O3 based metal matrix composite were produced by mechanical stir casting process. The obtained cast metal matrix composite is carefully machined to prepare the test specimens for hardness, tensile as well as fracture toughness studies as per ASTM standards. The hardness, tensile strength and fracture toughness properties of Al6061-Al2O3 composites are explored experimentally. Finally compare the material characterization with heat treatment process sample and compare the fracture toughness of sample with mathematical approach, experimental and finite element method.

Growth and Characterization of 420 kg Bulk Multicrystalline Silicon (mc-Si) Ingot Grown by Directional Solidification Process for Photovoltaic Application

2013 ◽  
Vol 873 ◽  
pp. 592-597
Author(s):  
Da Wei Luo
Keyword(s):  
Polycrystalline Silicon ◽  
Influence Factors ◽  
Solidification Process ◽  
Casting Process ◽  
Utilization Rate ◽  
Crucible Material ◽  
Silicon Ingot ◽  
Photovoltaic Application ◽  
Main Influence

Cast mc-Si ingots are widely used in photovoltaic manufacturing. The utilization rate of industrial polycrystalline silicon ingot only about 70%, most of them are less than 70%, the main influence factors are casting process, raw and auxiliary materials as well as the crucible material. The growth process and the overall characteristics of 420 kg polycrystalline silicon ingot are analyzed and researched in detail. This paper focuses on the distribution characteristics and causes of the casting defect which are analyzed in detail and discussed, at the same time suggestions are given to improve the utilization rate of the ingot.

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