Results 11 to 20 of about 391,234 (275)
Negative stiffness and modulated states in active nematics [PDF]
Soft Matter, 2016 Activity softens the stiffness of active nematics on a frictional substrate, yielding modulated phases and active turbulence.
Srivastava, Pragya +2 more
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Applied Sciences, 2020 Underground structures can be vulnerable during strong earthquakes, and seismic mitigation systems designed for these structures are instrumental in improving multiple aspects of seismic performance. To deal with this problem, a novel isolation system is
Qingjun Chen, Yanchao Wang, Zhipeng Zhao
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Buildings, 2022 The present article deals with the mathematical investigation of a negative-stiffness ideal system that can be used in seismic isolation of civil engineering structures.
Nikoleta Chatzikonstantinou +2 more
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Tailoring Strongly Nonlinear Negative Stiffness [PDF]
Journal of Mechanical Design, 2013 Negative, nonlinear stiffness elements have been recently designed as configurations of pairs or groups of linear springs. We propose a new design of such a system by using a single linear spring with its moving end rolling on a path described by an equation of varying complexity.
F. Liu +4 more
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Machines, 2022 In recent decades, quasi-zero stiffness (QZS) vibration isolation systems with nonlinear characteristics have aroused widespread attention and strong research interest due to their enormous potential in low-frequency vibration isolation.
Zhaozhao Ma, Ruiping Zhou, Qingchao Yang
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Double‐Negative Mechanical Metamaterials Displaying Simultaneous Negative Stiffness and Negative Poisson's Ratio Properties [PDF]
Advanced Materials, 2016 A scalable mechanical metamaterial simultaneously displaying negative stiffness and negative Poisson's ratio responses is presented. Interlocking hexagonal subunit assemblies containing 3 alternative embedded negative stiffness (NS) element types display Poisson's ratio values of -1 and NS values over two orders of magnitude (-1.4 N mm-1 to -160 N mm-1
Hewage, Trishan +3 more
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Strings with Negative Stiffness and Hyperfine Structure [PDF]
, 1998 We propose a new string model by adding a higher-order gradient term to the rigid string, so that the stiffness can be positive or negative without loosing stability.
A. M. Polyakov +31 more
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Infinitely stiff composite via a rotation-stabilized negative-stiffness phase [PDF]
Applied Physics Letters, 2011 We show that an elastic composite material having a component with sufficiently negative stiffness to produce positive-infinite composite stiffness can be stabilized by the gyroscopic forces produced by composite rotation.
Kochmann, D. M., Drugan, W. J.
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Nihon Kikai Gakkai ronbunshu, 2017 Vibration tests of the prototype of the newly developed three-dimensional seismic isolation mechanism were carried out using several real-scale three-dimensional seismic waves with the world's largest E-defense shaking table.
Masashi YASUDA +4 more
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Stability of negative stiffness viscoelastic systems [PDF]
Quarterly of Applied Mathematics, 2004 Summary: We analytically investigate the stability of a discrete viscoelastic system with negative stiffness elements both in the time and frequency domains. Parametric analysis was performed by tuning both the amount of negative stiffness in a standard linear solid and driving frequency.
Wang, Yun-Che, Lakes, Roderic
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