By T. W. Clyne

This e-book provides a accomplished, built-in assurance of steel matrix composites, together with the history to analytical-, experimental-, production-, and application-oriented features. transparent pictorial descriptions are given of the fundamental ideas governing a variety of houses and features. those surround mechanical, thermal, electric, environmental, and put on habit. insurance additionally extends to fabric processing and part fabrication elements and a survey of industrial utilization.

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The equal strain treatment is often described as a ' Voigt model'. 2 Transverse stiffness Prediction of the transverse stiffness of a composite from the elastic properties of the constituents is far more difficult than the corresponding axial value. This is because, in a real composite, the phases are neither equally stressed nor equally strained, as depicted in Fig. 1. Furthermore, the symmetry of the composite is different from that of the slab model. The 'equal stress' bound is obtained by considering an applied stress in the ' 2 ' direction so that the component strains can be expressed in terms of the applied stress.

2 Transfer of normal stress across fibre ends Several attempts have been made 9 " 11 to introduce corrections for the neglect of stress transfer across the fibre ends. This becomes increasingly necessary for lower fibre aspect ratios and smaller fibre/matrix stiffness ratios and is thus particularly significant for MMCs. Any attempt to account for the effect, while retaining the attractive simplicity of the shear lag approach, must involve postulating an analytical expression for the fibre end stress

4) Assembly of a set of simultaneous equations, using K and F for each volume element and equating the net effect to that with a global K and a global F. This is sometimes referred to as use of the principle of virtual work, balancing internal and external energies. g. g. displacements and hence strain fields). Coupled thermo-mechanical problems can also be solved, by ensuring compatibility between thermal and displacement fields; this has been done 22 for residual thermal stresses in MMCs, using a Rayleigh-Ritz method for stress and a Galerkin method for heat flow.

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