Continuum theory of fracture in the compression of composite materials with a metallic matrix

1982 ◽  
Vol 18 (12) ◽  
pp. 1045-1053 ◽  
Author(s):  
A. N. Guz'
Keyword(s):  
Composite Materials ◽  
Metallic Matrix ◽  
Continuum Theory

Homogenization and Smoothing: A Unified View of Two Derivations of Effective Property Theories and Extensions

1980 ◽  
Vol 47 (3) ◽  
pp. 679-682 ◽  
Author(s):  
L. Fishman ◽  
J. J. McCoy
Keyword(s):  
Composite Materials ◽  
Continuum Theory ◽  
Effective Property ◽  
Bulk Property ◽  
Unified Framework ◽  
Relaxation Theory ◽  
Property Theory ◽  
Statistical Continuum ◽  
Dimensionless Ratio ◽  
Unified View

The response of a continuum characterized by two widely differing length scales, parameterized by the dimensionless ratio ε, is considered in the context of the composite materials problem. The development of a bulk property theory appropriate in the ε → 0 limit is examined, both from the perspective of the deterministic homogenization literature and the smoothing method associated with statistical continuum theory, and a unified framework is established. The extension of bulk property theories through the development of ordered expansions in powers of ε is discussed and specifically related to analogous treatments in linear-gas relaxation theory.

scholarly journals Research Summary on the Processing, Mechanical and Tribological Properties of Aluminium Matrix Composites as Effected by Fly Ash Reinforcement

Crystals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1212
Author(s):  
Alaa Mohammed Razzaq ◽  
Dayang Laila Majid ◽  
Uday M. Basheer ◽  
Hakim S. Sultan Aljibori
Keyword(s):  
Composite Materials ◽  
Fly Ash ◽  
Power Plants ◽  
Bottom Ash ◽  
Metallic Matrix ◽  
Weight Fraction ◽  
Combustion Products ◽  
Coal Waste ◽  
Matrix Composites ◽  
Coal Combustion Products

Fly ash is the main waste as a result of combustion in coal fired power plants. It represents about 40% of the wastes of coal combustion products (fly ash, boiler ash, flue gas desulphurization gypsum and bottom ash). Currently, coal waste is not fully utilized and waste disposal remains a serious concern despite tremendous global efforts in reducing fossil fuel dependency and shifting to sustainable energy sources. Owing to that, employment of fly ash as reinforcement particles in metallic matrix composites are gaining momentum as part of recycling effort and also as a means to improve the specifications of the materials that are added to it to form composite materials. Many studies have been done on fly ash to study composite materials wear characteristics including the effects of fly ash content, applied load, and sliding velocity. Here, particular attention is given to studies carried out on the influence FA content on physical, mechanical, and the thermal behavior of Aluminium-FA composites. Considerable changes in these properties are seen by fly ash refinement with limited size and weight fraction. The advantage of fly ash addition results in low density of composites materials, improvement of strength, and hardness. It further reduces the thermal expansion coefficient and improve wear resistance.

Friction Stir Welding of Composite Materials with Metallic Matrix: A Brief Review

2015 ◽  
Vol 809-810 ◽  
pp. 449-454 ◽  
Author(s):  
Ana Boşneag ◽  
Marius Adrian Constantin ◽  
Eduard Niţu ◽  
Monica Iordache ◽  
Alin Rizea
Keyword(s):  
Composite Materials ◽  
Friction Stir Welding ◽  
Welded Joint ◽  
Metallic Matrix ◽  
Welding Process ◽  
Fusion Welding ◽  
Industrial Environment ◽  
Friction Stir ◽  
Current State ◽  
Welding Processes

Composite materials with metallic matrix are increasingly require more than traditional materials metallic, being lighter, more reliable and with their superior properties like: rigidity, tensile strength, flexural strength, fatigue strength, modulus of elasticity, hardness, etc. Due to these advantages, above mentioned, this process has largely penetrated industrial environment. Despite these advantages, there are restrictions on their combination through traditional fusion welding methods so that was passed at the solid-state welding processes, respectively at Friction Stir Welding (FSW). Our researches presents in this brief review: some general ideas about composite materials with metallic matrix and Friction Stir Welding process, appearance and benefits, basic information about the process and composite materials welded by this process, shows the current state of the research with respect to behaviour macrostructure, microstructure, microhardness, tensile properties and defects of the welded joint between composite materials with metallic matrix.

Toward A Diffusing Continuum Theory of Composite Materials

1971 ◽  
Vol 38 (1) ◽  
pp. 8-14 ◽  
Author(s):  
A. Bedford ◽  
M. Stern
Keyword(s):  
Composite Materials ◽  
Dynamical Behavior ◽  
Continuum Theory ◽  
Relative Displacement ◽  
Classical Solutions ◽  
Longitudinal Wave Propagation ◽  
Theory Of Mixtures ◽  
The Individual ◽  
Laminated Materials ◽  
The Continuum

A theory of composite materials is proposed which is based on the continuum theory of mixtures. The constituents of a composite are modeled as superimposed continua which undergo individual deformations. Effects of structure on dynamical processes in composite materials are then simulated by specifying the coupling between the individual constituent motions. A novel feature of this model is the inclusion of diffusion with relative displacement coupling for perfectly bonded composites. A simple one-dimensional form of such a theory is presented, and, when compared with classical solutions for longitudinal wave propagation in laminated materials, predicts some aspects of the dynamical behavior extremely well.

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