Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Eric M. Mockensturm"'
Publikováno v:
Journal of the Mechanics and Physics of Solids. 131:337-343
In bulk crystals dislocation junctions underlie the physics of strain hardening. In two-dimensional (2D) crystals, dislocations take the form of surface ripples owing to the ease of bending and weak vdW adhesion of the atomic layers. Here we report t
Autor:
Nicholas Antolino, Eric M. Mockensturm, C.L. Muhlstein, Gregory Hayes, Rebecca Kirkpatrick, James H. Adair, Mary Frecker
Publikováno v:
Journal of the American Ceramic Society. 92:S63-S69
Free-standing mesoscale (340 mum x 30 mum x 20 mum) bend bars with an aspect ratio over 15:1 and an edge resolution as fine as a single grain diameter ( approximately 400 nm) have been fabricated in large numbers on refractory ceramic substrates by c
Publikováno v:
International Journal of Solids and Structures. 44:2609-2626
Electro-elastomers are large strain smart materials capable of both sensing and actuation. Typical electro-elastomer setups consist of either a silicone or acrylic membrane sandwiched between two compliant grease electrodes. Silicone electro-elastome
Publikováno v:
Structural and Multidisciplinary Optimization. 32:121-132
Topology optimization is often used in the conceptual design stage as a preprocessing tool to obtain overall material distribution in the solution domain. The resulting topology is then used as an initial guess for shape optimization. It is always de
Autor:
Eric M. Mockensturm, Jie Jiang
Publikováno v:
Nonlinear Dynamics. 43:391-409
For active materials such as piezoelectric stacks, which produce large force and small displacement, motion amplification mechanisms are often necessary – not simply to trade force for displacement, but to increase the output work transferred throu
Autor:
Eric M. Mockensturm, Jie Jiang
Publikováno v:
Nonlinear Dynamics. 45:1-14
In this paper, the nonlinear behavior of a motion amplifier used to obtain large rotations from small linear displacements produced by a piezoelectric stack is studied. The motion amplifier uses elastic (buckling) and dynamic instabilities of an axia
Autor:
Jianping Guo, Eric M. Mockensturm
Publikováno v:
Journal of Applied Mechanics. 72:374-380
The dynamic response of parametrically excited, axially moving viscoelastic belts is investigated in this paper. Results are compared to previous work in which the partial, not material, time derivative was used in the viscoelastic constitutive relat
Publikováno v:
Journal of Applied Mechanics. 72:899-906
The material and geometrical nonlinearities of novel dielectric elastomer actuators make them more difficult to model than linear materials used in traditional actuators. To accurately model dielectric elastomers, a comprehensive mathematical formula
Publikováno v:
Journal of Intelligent Material Systems and Structures. 15:49-58
A nonlinear motion transmission mechanism for improving the mechanical work output of an active material drive element is presented. This improvement is achieved by addressing the typical mismatch between the characteristics of a driven load, such as
Autor:
Gary H. Koopmann, Jacob Loverich, Weiching Chen, George A. Lesieutre, Jeremy E. Frank, Eric M. Mockensturm
Publikováno v:
Journal of Intelligent Material Systems and Structures. 14:217-227
A bimorph-driven rotary motor has been developed, and demonstrated in a flow-control actuation application. A rotary (roller) clutch rectifies bimorph-powered oscillation into rotational motion to convert electrical to mechanical power. Through a pro