By Anthony C. Fischer-Cripps
Touch mechanics bargains with the elastic or plastic touch among good items, and is hence in detail attached with such themes as fracture, hardness, and elasticity.
This textual content, meant for complicated undergraduates, starts with an advent to the mechanical houses of fabrics, basic fracture mechanics, and fractures in brittle solids. this is often through an in depth dialogue of stresses and the character of elastic and elastic-plastic touch. The dialogue then turns to an outline of rigidity fields and their function within the formation of cracks in brittle fabrics and of sub-surface harm in ductile fabrics. The ebook concludes with an summary of sensible equipment if indentation trying out.
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Extra resources for Introduction to Contact Mechanics (Mechanical Engineering Series)
Example text
T. Hagan, “Indentation plasticity and the ensuing fracture of glass,” J. Phys. D: Appl. Phys. 9, 1976, pp. 2201–2214. T. Huber, “Contact of solid elastic bodies,” Ann. D. Physik, 14 1, 1904, pp. 153–163. C. Fischer-Cripps, “Elastic–plastic response of materials loaded with a spherical indenter,” J. Mater. Sci. 32 3, 1997, pp. 727–736. Dj. Mesarovic and N. A. Fleck, “Spherical indentation of elastic–plastic solids,” Proc. R. Soc. Lond. A455, 1999, pp. 2707–2728. R. H. J. Tupper, “Theory of wedge-indentation of ductile metals,” Proc.
3. Analysis of Nanoindentation Test Data 39 Doerner and Nix3 thus use Eq. 1c, with A being the contact area of the punch, to obtain the depth of the edge of the circle of contact ha, and hence hp. The radius of the circle of contact at full load is obtained from the slope of the initial unloading. With reference to Fig. 2 (b), for the initial unloading, the cone acts like a punch in terms of its “constant” area of contact, since the initial unloading is appears to be linear. If the area of contact remained constant during the entire unloading, then the unloading curve would be linear: from Pt to P = 0.
Soc. 65, 1980, pp. C175–C176. 1 Analysis of Indentation Test Data As described in Chapter 2, estimations of both elastic modulus and hardness of the specimen material in a nanoindentation test are obtained from load versus penetration measurements. Rather than a direct measurement of the size of residual impressions, contact areas are instead calculated from depth measurements together with a knowledge of the actual shape of the indenter. For this reason, nanoindentation testing is sometimes referred to as depth-sensing indentation testing.