Nanoindentation hardness of mineralized tissues.
A series elastic and plastic deformation model [Sakai, M., 1999. The Meyer hardness: a measure for plasticity? Journal of Materials Research 14(9), 3630-3639] is used to deconvolute the resistance to plastic deformation from the plane strain modulus and contact hardness parameters obtained in a nanoindentation test. Different functional dependencies of contact hardness on the plane strain modulus are examined. Plastic deformation resistance values are computed from the modulus and contact hardness for engineering materials and mineralized tissues. Elastic modulus and plastic deformation resistance parameters are used to calculate elastic and plastic deformation components, and to examine the partitioning of indentation deformation between elastic and plastic. Both the numerical values of plastic deformation resistance and the direct computation of deformation partitioning reveal the intermediate mechanical responses of mineralized composites when compared with homogeneous engineering materials.
Oyen
Michelle L
ML
Department of Biophysical Sciences and Medical Physics, University of Minnesota, Minneapolis, MN 55455, USA. oyen0004@umn.edu
D000465:Algorithms; D000535:Aluminum / Q000737:chemistry; D001696:Biomechanical Phenomena; D001842:Bone and Bones / Q000737:chemistry* / Q000502:physiology; D003743:Dental Enamel / Q000737:chemistry* / Q000502:physiology; D003804:Dentin / Q000737:chemistry* / Q000502:physiology; D004548:Elasticity; D006244:Hardness; D006245:Hardness Tests; D006801:Humans; D008962:Models, Theoretical; D036103:Nanotechnology / Q000379:methods*; D012822:Silicon Dioxide / Q000737:chemistry
D012822:Silicon Dioxide; D000535:Aluminum