DAMPING OF FLEXURE BLADES BASED ON BI-MATERIAL ADDITIVE MANUFACTURING: OPPORTUNITY FOR NEW DAMPER TOPOLOGIES?
No Thumbnail Available
Author
Salamin, Lisa
Saudan, Hervé
Kiener, Lionel
Klauser, Elias
Blondiaux, Nicolas
Kalentics, Nikola
Rousseaux, Olivier
Zikulnig, Johanna
DOI
Abstract
In space applications, mechanisms and instruments are submitted to shocks and vibrations resulting from the rocket launch and other subsystems during operation. These harsh environmental conditions induce a need for damping systems to isolate the space mechanisms from disturbances. To tackle this challenge and preserve the friction-free properties of compliant mechanisms, CSEM added a damping action to their flexure-based technology. Damped flexure blades based on bi-material additive manufacturing were developed and validated. The blades consist of a sandwich of two planar parallel metallic lattice patterns with an elastomer impregnated in-between. These blades were characterized under free and forced sinusoidal oscillations. Compared with reference flexures, the damped flexures show quality factors Q reduced by a factor of 64. This reduction implies a damping action increased by a factor of 97 considering the viscous damping coefficient. These results open promising perspectives to develop new types of dampers.
Publication Reference
17th ECSSMET - European Conference on Spacecraft Structures Materials and Environmental Testing, Toulouse (France), pp. 210-219
Year
2023-03-29