Download e-book for kindle: Advanced Materials for Sports Equipment: How Advanced by E.A. Easterling
By E.A. Easterling
Practically all activities have benefited in a few an important means through the advent of man-made fabrics. complex fabrics in activities apparatus is a readable creation to those new fabrics. The booklet examines the function performed by means of complex fabrics within the layout, functionality, visual appeal and protection elements of varied gear and exhibits most likely destiny developments.
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Extra info for Advanced Materials for Sports Equipment: How Advanced Materials Help Optimize Sporting Performance and Make Sport Safer
THE RA W MATERIALS IN COMPOSITES: FIBRES AND BINDERS The main types of fibres used in sports equipment are: carbon, glass, aramid or Kevlar, polyurethane (PU) and boron. Ceramic (silicon carbide or aluminium oxide) fibres are also now being used in certain applications. Of the matrix materials binding the fibres together, the most common are based on polymer resins such as epoxy or polyester. New tough binders are also being investigated and one of these is known as PEEK (polyetheretherketone).
3 this material would be the advanced ceramic of boron nitride. If we decided that the material in question had to be metallic, then the best material would evidently be steel. This may sound astrange result when it is seen that the density of steel is nearly twice as high as that of titanium. However, this result tells us simply that if we needed a bar to have the highest stiffness for the minimum crosssectional area, then steel is a better candidate than titanium, aluminium or magnesium. Note that if we use cellular materials instead of solid materials, the specific strength or stiffness in effect increases, since (!
13. 14) we find that the specific design property is given by: specific property (max) = VEie where VE refers to the square root of the elastic modulus. Having obtained our specific design property, we must decide on which materials are of interest. 3. As before we need to select the material having the maximum design stiffness. We see that the best material is the carbon fibre composite, although (surprisingly) bamboo is not too far behind! F ( Bending of rods and tubes B ß LI "! t}~ C Buckling of slender column or tube t I l_i j t~ ~Ii t Strength E Oy p P G1I2 oy2l3 P p G1/2 Oy2l3 P P E1/2 oi/3 P P E1/2 -p F '---...
Advanced Materials for Sports Equipment: How Advanced Materials Help Optimize Sporting Performance and Make Sport Safer by E.A. Easterling