FFATA: Mechine Augmented Composites for Structures with High Damping with High Stiffness.

摘要

The Material Logic program aims to create novel materials that exhibit high stiffness and high damping. The joint Texas A&M University (Texas Engineering Experiment Station or TEES)/The Aerospace Corporation (AERO) effort seeks to develop a new composite material by exploiting negative-stiffness, positive-stiffness, and damping elements to form a novel material system. Overall success is defined as developing a material that can achieve a 1.0 damping coefficient with a 100 GPa elastic modulus. The material system should also be optimized for 0.01 s duration impulses and cyclic loadings in the 0.1 to 10 Hz regime and be adaptable to a wide load range. The AERO team made a breakthrough in applying the negative spring by stabilizing the spring within a positive stiffness composite structure. Figure 1 shows one application concept: a composite structure that stabilizes the clover dome's negative stiffness regime with damping integrated into the mobile interface between positive and negative springs. Further, a design from AERO, the WTG fluidic damping element, showed adaptive response when filled with shear thickening fluids.