2002 Gordon Research Conference on High Temp, Materials, Processes, and Diagnostics
Abstract
During this project, the development of AFM experimental expertise was undertaken. An AFM was purchased and modified for the dynamic AFM measurements. The system allows the cantilever resonance frequencies to be determined both in and out of contact with a specimen. In addition, the dynamic implementation allows the surface topography and material stiffness to be mapped simultaneously. During this project, several aspects of this research were explored. One focus was on comparison of ATM methods with other experimental measurement techniques using thin films as a test base. Improved modeling of the AFM cantilevers was undertaken as it became apparent that simpler methods were not sufficient for experimental analysis. Finite element models are being constructed to include observed variations in cantilever width, thickness, and tip location. The analytical modeling has been focused on the nonlinear vibrations of ATM cantilevers with nonlinear boundary conditions. The studies of nonlinear vibrations have been extended for contact boundary conditions of a general nature such that both soft and hard contacts may be analyzed. The method of multiple scales is the primary method used for these studies. Finally, the coupling of flexural and torsional vibration modes has been examined. The coupling is the result of the specific geometry of certain ATM cantilevers. Both experimental and analytical studies have been conducted.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 06, 2003
- Accession Number
- ADA414053
Entities
People
- Theodore M. Besmann
Organizations
- Gordon Research Conferences