This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Chaudhry, Z. Articles by Rogers, C.A. Search for Related Content Social Bookmarking                         What's this?

The Pin-Force Model Revisited

Center for Intelligent Material Systems and Structures Virginia Polytechnic Institute and State University Blacksburg, VA 24061-0261

C.A. Rogers

Center for Intelligent Material Systems and Structures Virginia Polytechnic Institute and State University Blacksburg, VA 24061-0261

The pin-force model is one of the earliest models developed for beams actuated in bending. In this model, the actuators and substrates are considered as separate elastic bodies and the forces from the actuators are transferred to the substrates by "pins" at the edges of the actuators. Although this model of force transfer is consistent with the assumed perfect bonding scenario, where the shear stress is concentrated in a small area close to the edge of the actuator, it fails to provide the correct structural response for the case where the actuator is relatively thick. In this paper, while retaining the basic features of this model (i.e., treating the actuator and beam as separate bodies), the corrections necessary to upgrade this model to the level of the more accurate Bernoulli-Euler model are presented. The basic difference lies in the appropriate inclusion of the actuator flexural stiffness in the structural moment-curvature equations. Two configurations are considered: one in which the actuators are symmetrically bonded on the surface of the beam and activated out-of-phase, and one in which the actuator is bonded to one side of the beam only. The static beam response equa tions developed for both cases are shown to be identical to those obtained from the more rigorous Bernoulli-Euler model. This work thus forms a bridge between the relatively simple pin-force model and the Bernoulli-Euler model, and illustrates the use of mechanics principles in the treatment of structures with active members such as induced strain actuators.

Journal of Intelligent Material Systems and Structures, Vol. 5, No. 3, 347-354 (1994)
DOI: 10.1177/1045389X9400500307


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?

This article has been cited by other articles:

				R. Jha and C. He Adaptive Neurocontrollers for Vibration Suppression of Nonlinear and Time Varying Structures Journal of Intelligent Material Systems and Structures, September 1, 2004; 15(9-10): 771 - 781. [Abstract] [PDF]

				J. A. Lewis and D. J. Inman Finite Element Modeling and Active Control of an Inflated Torus Using Piezoelectric Devices Journal of Intelligent Material Systems and Structures, December 1, 2001; 12(12): 819 - 833. [Abstract] [PDF]

				R. B. Williams, E. M. Austin, and D. J. Inman Limitations of Using Membrane Theory for Modeling PVDF Patches on Inflatable Structures Journal of Intelligent Material Systems and Structures, January 1, 2001; 12(1): 11 - 20. [Abstract] [PDF]

				P. Gaudenzi, D. Giarda, and F. Morganti Active Microvibration Control of an Optical Payload Installed on the ARTEMIS Spacecraft Journal of Intelligent Material Systems and Structures, September 1, 1998; 9(9): 740 - 748. [Abstract]

				P. Gaudenzi, E. Fantini, V. K. Koumousis, and C. J. Gantes Genetic Algorithm Optimization for the Active Control of a Beam by Means of PZT Actuators Journal of Intelligent Material Systems and Structures, April 1, 1998; 9(4): 291 - 300. [Abstract]

				J. S. Yang Equations for Elastic Plates with Partially Electroded Piezoelectric Actuators in Flexure with Shear Deformation and Rotatory Inertia Journal of Intelligent Material Systems and Structures, May 1, 1997; 8(5): 444 - 451. [Abstract]