title: Nondestructive experimental determination of bimaterial rectangular cantilever spring constants in water.
abstract: In order to address the issue of spring constant calibration in viscous fluids such as water, a new method is presented that allows for the experimental calibration of bimaterial cantilever spring constants. This method is based on modeling rectangular cantilever beam bending as a function of changing temperature. The temperature change is accomplished by heating water as it flows around the cantilever beams in an enclosed compartment. The optical static method of detection is used to measure the deflection of cantilever at the free end. Experimentally determined results are compared to Sader's method and to the Thermotune method most commonly used in cantilever calibrations. Results indicate that the new bimaterial thermal expansion method is accurate within 15%-20% of the actual cantilever spring constant, which is comparable to other nondestructive calibration techniques.
authors.affiliation: Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, USA. david.e.snow@ttu.edu
authors.forename: David E
authors.initials: DE
authors.lastname: Snow
authors.forename: Brandon L
authors.initials: BL
authors.lastname: Weeks
authors.forename: Dae Jung
authors.initials: DJ
authors.lastname: Kim
authors.forename: Rajasekar
authors.initials: R
authors.lastname: Pitchimani
authors.forename: Louisa J
authors.initials: LJ
authors.lastname: Hope-Weeks