Atomic force microscopy (AFM) is one of many new technologies available to study the mechanical properties and mechanobiological responses of living cells. Despite the widespread usage of this technology, there has been little attempt to develop new theoretical frameworks to interpret the associated data. Rather, most analyses rely on the classical Hertz solution for the indentation of an elast...

The accuracy of electron backscatter diffraction (EBSD) and confocal Raman microscopy (CRM) for small-scale strain mapping are assessed using the multi-axial strain field surrounding a wedge indentation in Si as a test vehicle. The strain field is modeled using finite element analysis (FEA) that is adapted to the near-indentation surface profile measured by atomic force microscopy (AFM). The as...

We describe a finite element (FE) model for simulating wheel-rolling tissue deformations using a rolling finite element model (RFEM). A wheeled probe performing rolling tissue indentation has proven to be a promising approach for compensating for the loss of haptic and tactile feedback experienced during robotic-assisted minimally invasive surgery (MIS) [1-6]. A sound understanding of wheeltiss...

Nano/micro-manufacturing under wet condition is an important consideration for various tool-based processes such as indentation, scratching, and machining. The existence of liquids adds complexity to the system, changes the tool/work interfacial condition, and affects material behaviors. For indentation, it may also affect material property measurements. However, little effort has been made to ...

UNLABELLED The purpose of the study was to compare Quasi-Static (QS) and harmonic (CSM) methods of indentation testing. Bone sections were obtained from mid-femoral diaphyses of dogs which received a pair of calcein labels. Labeled (n = 35) and unlabeled (n = 112) osteons were identified. Indentation modulus (IM) and hardness (H) for the CSM method were collected during the entire loading cycle...

In this work, we investigated the bulk phase distinguishing of the poly(ε-caprolactone)-polybutadiene-poly(ε-caprolactone) (PCL-PB-PCL) triblock copolymer blended in epoxy resin by tapping mode atomic force microscopy (TM-AFM). We found that at a set-point amplitude ratio (rsp) less than or equal to 0.85, a clear phase contrast could be obtained using a probe with a force constant of 40 N/m. Wh...

STUDY DESIGN human cadaveric biomechanical study of indentation tests on the thoracolumbar vertebral endplates. OBJECTIVE to map the strength profile of the thoracolumbar endplates using indentation testing, and to document any changes in this profile with vertebral level. SUMMARY OF BACKGROUND DATA the strength profile of the lumbosacral endplate was described previously. Based on these da...

Abstract Current three-body abrasive wear theories are based on a macroscale indentation process, and these claim that material cannot be achieved without damaging the hard mating surface. In this study, process of nano-abrasive system including single crystalline silicon substrate, an amorphous silica cluster, polyurethane pad, chemical mechanical polishing (CMP) is investigated via molecular ...

PURPOSE To determine the clinical practicability of in vivo dynamic corneal imaging (DCI) to assess the individual elastic properties of normal human eyes, eyes with abnormal findings, and eyes after refractive surgery. SETTING University Eye Clinic, Paracelsus Private Medical University, Salzburg, Austria. METHODS The DCI method uses sagittal, stepwise, central indentation of the cornea wi...