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Snow DE, Weeks BL, Kim DJ, et al. Nondestructive experimental determination of bimaterial rectangular cantilever spring constants in water. Rev Sci Instrum. 2008;79(8):083706doi: 10.1063/1.2969031.
Snow, D. E., Weeks, B. L., Kim, D. J., Pitchimani, R., & Hope-Weeks, L. J. (2008). Nondestructive experimental determination of bimaterial rectangular cantilever spring constants in water. The Review of scientific instruments, 79(8), 083706. https://doi.org/10.1063/1.2969031
Snow, David E, et al. "Nondestructive experimental determination of bimaterial rectangular cantilever spring constants in water." The Review of scientific instruments vol. 79,8 (2008): 083706. doi: https://doi.org/10.1063/1.2969031
Snow DE, Weeks BL, Kim DJ, Pitchimani R, Hope-Weeks LJ. Nondestructive experimental determination of bimaterial rectangular cantilever spring constants in water. Rev Sci Instrum. 2008 Aug;79(8):083706. doi: 10.1063/1.2969031. PMID: 19044356.
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Rev Sci Instrum. 2008 Aug;79(8):083706. doi: 10.1063/1.2969031.

Nondestructive experimental determination of bimaterial rectangular cantilever spring constants in water.

The Review of scientific instruments

David E Snow, Brandon L Weeks, Dae Jung Kim, Rajasekar Pitchimani, Louisa J Hope-Weeks

Affiliations

  1. Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, USA. [email protected]

PMID: 19044356 DOI: 10.1063/1.2969031

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.

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