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BIOMEDICAL APPLICATION OF COMPOSITE MATERIALS: REQUIREMENT OF BIOMATERIAL

Posted by Connie R. Aponte on November 6, 2013 in Economy |

BIOMATERIAL

The Composite materials are engineered materials made from two or more constituent insoluble materials with significantly different physical and/ or chemical properties which remain separate and distinct on a macroscopic level within the finished structure. Their properties are superior to those of the constituents acting independently. Composite is made of fibrous materials held in place by a matrix system. The matrix system grips or supports the fibrous material and transfers the stress to the fiber to carry the load. There is a wide array of matrix materials available like polymers; metals and ceramics. They derive most of their unique characteristics from the reinforcing fibers.

Fabricating a composite part is simply a matter of placing and retaining fibers in the desired directions and form that provides specified mechanical characteristics while the part performs its design function. Reinforcements are supplied in a variety of types and physical forms, which determine the physical performance characteristics of the final components. Most reinforcing fibers are available in continuous, chopped and woven (fabric) forms. Fabrics confer directional strength characteristics and different weave patterns (unidirectional, multiaxial, etc.) are employed to take advantage of this. Economy News

Bio-medical prosthetic devices are artificial replacements that are used in the human body to function as original parts. Materials used for such prosthetic aids must be non-toxic, biologically and chemically stable, and have sufficient mechanical integrity and strength to withstand physiological loads. A major design requirement of biomaterial prostheses is to match their elastic properties with those of the natural host tissue. Composite materials address this requirement because their elastic properties can be altered accurately through composition and directionality parameters, and they can be designed to match closely the elastic properties of the biological tissues, in isocompliance, modulus gradient and anisotropy. This adds to a range of advantages of synthetic composite materials with respect to potential biomedical applications, which draw on their heterogeneity and anisotropy.

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