22 papers · ranked by Valyu relevance
Jing Zhang, Zhuo Yang, Tianhao Wu, Zhichao Yao + 3 more
'Erwin Peiner'] In differential MEMS resonant sensors, a pair of resonators are interconnected with other structural components while sharing a common substrate. This leads to mutual coupling of vibration energy between resonators, interfering with their frequency outputs and affecting the sensor’s static performance.…
D. A. Vargas, T. Heck, B. Smeets, H. Ramon + 2 more
The interplay between cell-cell and cell-substrate interactions is complex yet necessary for the formation and well-functioning of tissues. The same mechanosensing mechanisms used by the cell to sense its extracellular matrix, also play a role in intercellular interactions. We used the discrete element method to…
Qi‐Chang He, Rui Wang, Matthew Alexander, Keegan J. Moore
The safety and integrity of engineered structures are critically dependent on maintaining sufficient preload in their bolted joints. This preload can be dynamically lost due to sustained vibrations or sudden shock that are large enough to induce slip in the threads. While high-fidelity finite element simulations and…
Yanwei Guan, Shiqiao Gao, Haipeng Liu, Lei Jin + 2 more
'Vittorio M. N. Passaro'] In this paper, a new micromachined tuning fork gyroscope (TFG) with an anchored diamond coupling mechanism is proposed while the mode ordering and the vibration sensitivity are also investigated. The sense-mode of the proposed TFG was optimized through use of an anchored diamond coupling…
Jie Yang, Yingchun Chen, Long Jin
With the rapid development of urban rail transit, the floating slab vibration isolation system has become widely used in the field due to its effective vibration reduction and isolation capabilities. Traditional floating slab vibration-isolation systems mainly focus on blocking vibration transmission, neglecting energy…
Sunao TOMITA, Kento Shimanuki, Kazuhiko Umemoto, Atsushi Kawamoto + 2 more
'Tsuyoshi Nomura' 'Tomohiro Tachi'] Origami-based structures play an important role in the realization of deployable mechanisms and unique mechanical properties via programmable deformation by folding. Among origami-based structures, tessellation by the coupling of origami tubes enriches the variations in geometry and…
Alexander Nowak, Lucio Flavio Campanile, Alexander Hasse
Cyclic variations in the stiffness of a structural system have been addressed in several previous studies as an effective semi-active vibration reduction method. The proposed applications of this idea, denoted here as stiffness modulation, range from stepwise stiffness variations on a simple spring-mass system to…
Yifang Yin, Zunce Wang, Mingyue Ma, Jinglong Zhang + 3 more
'Lidong Li' 'Mingming Ge'] A two-dimensional tube bundles fluid-structure coupling model was developed using the CFD approach, with a rigid body motion equation and the Newmark integral method. The numerical simulations were performed to determine the vibration coupling properties between various tube bundles of…
Mauro L. Mugnai, Yonathan Goldtzvik, D. Thirumalai
Dimeric myosin motors, with both heads simultaneously bound to filamentous actin, are in a frustrated conformation. The lever arm of each head would prefer to orient forward, but the inter-head tension hinders the relaxation to the state favored by a myosin monomer. Here, we investigate theoretically the impact of…
Zach J. Patterson, Cosimo Della Santina, Daniela Rus
— While much work has been done recently in the realm of model-based control of soft robots and soft-rigid hybrids, most works examine robots that have an inherently serial structure. While these systems have been prevalent in the literature, there is an increasing trend toward designing soft-rigid hybrids with…
Max Goebels, Jan Baumgärtner, Tobias A. Fuchs, Edgar Mühlbeier + 2 more
Industrial robots are commonly used in various industries due to their flexibility. However, their adoption for machining tasks is minimal because of the low dynamic stiffness characteristic of serial kinematic chains. To overcome this problem, we propose coupling two industrial robots at the flanges to form a parallel…
Hannes Höppner, Maximilian Große-Dunker, Georg Stillfried, Justin Bayer + 1 more
'Justin Bayer' 'Patrick van der Smagt'] We investigate the relation between grip force and grip stiffness for the human hand with and without voluntary cocontraction. Apart from gaining biomechanical insight, this issue is particularly relevant for variable-stiffness robotic systems, which can independently control the…
Sen Wang, Haoran Li, Xueyan Han, Jiahao Wei + 3 more
'Abir Hussain'] Traditional stiffness modeling methods do not consider all factors comprehensively, and the modeling methods are not unified, lacking a global stiffness model. Based on screw theory, strain energy and the virtual work principle, a static stiffness modeling method for redundant over-constrained parallel…
Malte Krack, Lawrence A. Bergman, Alexander F. Vakakis
This work addresses friction-induced modal interactions in jointed structures, and their effects on the passive mitigation of vibrations by means of friction damping. Under the condition of (nearly) commensurable natural frequencies, the nonlinear character of friction can cause so-called nonlinear modal interactions.…
Akshay Karekar, Carsten Schicktanz, Muhammad Tariq, Katja Oßwald + 4 more
Degradation of polymer blends occurs by the constituent phases undergoing distinct chemical changes that depend on their unique chemical structures. This makes predicting and establishing a structure-property relationship for each phase necessary as well as challenging. In this work, the molecular and physical changes…
Stephanie Hu, Raz Leib, Ilana Nisky
Our sensorimotor system estimates stiffness to form stiffness perception, such as for choosing a ripe fruit, and to generate actions, such as to adjust grip force to avoid slippage of a scalpel during surgery. We examined how temporal manipulation of the haptic and visual feedback affect stiffness perception and grip…
Matthew Millard, David W. Franklin, Walter Herzog
The force developed by actively lengthened muscle depends on different structures across different scales of lengthening. For small perturbations, the active response of muscle is well captured by a linear-time-invariant (LTI) system: a stiff spring in parallel with a light damper. The force response of muscle to…
Khai Nguyen, Stéphane Dejean, Benjamin Nottelet, Julien Gautrot
The formation of hybrid hydrogel-elastomer scaffolds is an attractive strategy for the formation of tissue engineering constructs and microfabricated platforms for advanced in vitro models. The emergence of thiol-ene coupling, in particular radical-based, for the engineering of cell-instructive hydrogels and the design…
Taliyah Huang, Meghan E. Huber, Jeremy D. Brown, A. Michael West
Humans are remarkably adept at extracting latent dynamic information from purely visual cues. Prior work shows that people can innately estimate differences in limb stiffness using solely their visual observation of movement, which suggests that components of mechanical impedance may be embedded within humans’ internal…
Ahmed Elghool, Nasser Elshafey, Osman M. O. Ramadan, Mohamed S. Elbayomy
In some cases, it is necessary to create openings in coupling beams to accommodate utility pipes and ducts. The presence of these openings can alter the behavior of coupling beams, making their performance differ from that of solid coupling beams (without openings). However, research on the structural performance of…
Myoeum Kim, Shifeng Nian, Daniel Rau, Baiqiang Huang + 4 more
Three-dimensional (3D) printing of elastomers enables the fabrication of many technologically important structures and devices. However, there remains a critical need for the development of reprocessable, solvent-free soft elastomers that can be printed without the need for post-treatment. Here, we report modular soft…
Murari Singh, Zachary M. Sherman, Delia J. Milliron, Thomas M. Truskett
Gel assemblies of functional nanoparticles, reversibly associated into percolating networks using bifunctional linking molecules, offer promise as versatile materials platforms. Molecular linkers can be customized to template interparticle spacing and modify colloidal network attributes, enabling design for…