Mechanism nanomechanical deformation

Figure 1.1 Scheme of correlations between polymerization, molecular structure, morphology, processing conditions, and micro- or nanomechanical mechanisms of deformation and fracture depending on loading conditions, all of which determine the ultimate mechanical properties... 

Tensile stress—strain relationship is most studied in view of macro-deformation . Here molecular fundamentals are introduced, so the nanomechanics , which are discussed in relation to the molecular deformation mechanisms, can be understood. 

Yerramshetty, J.S., Lind, C., and Akkus, O. (2006) The compositional and physicochemical homogeneity of male femoral cortex increases after the sixth decade. Bone, 39 (6), 1236-1243. Donnelly, E. et al. (2010) Effects of tissue age on bone tissue material composition and nanomechanical properties in the rat cortex. J. Biomed. Mater. Res. A, 92 (3), 1048-1056. Donnelly, E. et al (2010) Contribution of mineral to bone structural behavior and tissue mechanical properties. Calcif. Tissue Int., 87 (5), 450—460. Pathak, S. et al (2012) Assessment of lamellar level properties in mouse bone utilizing a novel spherical nanoindentation data analysis method. J. Mech. Behav. Biomed. Mater., 13, 102—117. Burket, J.C. et al (2013) Variations in nanomechanical properties and tissue composition within trabeculae from an ovine model of osteoporosis and treatment. Bone, 52 (1), 326-336. Carden, A. et al (2003) Ultrastructural changes accompanying the mechanical deformation of bone tissue a Raman imaging study. Calcif. Tissue Int., 72 (2), 166-175. 

It is of great interest to investigate the evolution of submicron-scale local mechanical properties of polymers under deformation for the better understanding of deformation mechanisms, while AFM nanomechanics might be a good solution for this purpose. Here, submicron-scale mechanical... 

This chapter will also describe new methods for exploring the micro- and nanomechanical processes of wear. Here, a surface deformation mechanics analysis will be shown where the surface strains associated with single asperity wear behavior can be determined and related to both pol5mier structural changes (e.g., orientation of crystallites) and to changes in mechanical properties of the surface deformed UHMWPE (orientation softening) when... 

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