Results 51 to 60 of about 19,751 (206)

Dynamic shear modulus and damping ratio of compound subgrade mixed by arsenic sandstone in northern Shaanxi region and sand

open access: yesYantu gongcheng xuebao, 2021
The evolution laws of dynamic shear modulus and damping ratio of the compound soil mixed by the arsenic sandstone and the Fujian standard sand along with dynamic shear strain are studied by using the GDS dynamic triaxial apparatus for soils.A logarithmic
LI Hong-ru 1, 2, QIANG Chun-peng 1, 2, ZHU Hao-xuan 1, 2
doaj   +1 more source

Maximum warning times for imminent volcanic eruptions [PDF]

open access: yes, 2005
Accelerations in seismicity are important precursors to eruptions at volcanoes reawakening after extended repose intervals. These have previously been quantified for subduction-zone settings in terms of the linkage of crustal faults by shearing ...
Kilburn, CRJ, Sammonds, PR
core   +1 more source

Fabric‐Based Wearable Robotic Exoskeleton Gloves: Advancements and Challenges

open access: yesAdvanced Materials Technologies, EarlyView.
This review highlights interdisciplinary technological advances in fabric‐based robotic gloves, focusing on progress in design, fabrication, actuation, sensing, control, and power and energy requirements. It also addresses performance testing and validation, including biomechanical, strength, functional, user experience, and durability assessments, to ...
Ayse Feyza Yilmaz   +2 more
wiley   +1 more source

Deformation and rupture of stainless steel under cyclic, torsional creep [PDF]

open access: yes, 2008
Copyright 2008 @ Engineering Integrity Society.Recent results from a long-term, strain-limited, cyclic creep test program upon stainless steel tubes are given.
Rees, DWA
core  

Hierarchical Artificial Muscle with Nonlinear Elasticity for Antagonistic and Cyclic Robotics

open access: yesAdvanced Science, EarlyView.
We construct hierarchical muscles by plying nylon fibers around a heating wire. The hierarchical muscle shows a J‐shaped passive curve, which shows benefit in antagonistic muscle pair and work accumulation mechanism. We also develop a computational, first‐principle model to understand the physics of both active actuation stroke and passive J‐curve ...
Samuel Tsai   +15 more
wiley   +1 more source

Stiffness decay characteristics and disturbance effect evaluation of structured clay based on in-situ tests

open access: yesSoils and Foundations, 2022
The structure of the sedimentary clay influences its mechanical behavior in non-negligible ways. This paper proposes an effective approach for investigating the in-situ stiffness characteristics from shear modulus and strain decay curves (G–γ curves ...
Ran An   +3 more
doaj   +1 more source

A unified hyperbolic formulation for viscous fluids and elastoplastic solids

open access: yes, 2017
We discuss a unified flow theory which in a single system of hyperbolic partial differential equations (PDEs) can describe the two main branches of continuum mechanics, fluid dynamics, and solid dynamics.
AD Resnyansky   +23 more
core   +1 more source

Adaptive mesh refinements for thin shells whose middle surface is not exactly known [PDF]

open access: yes, 2008
A strategy concerning mesh refinements for thin shells computation is presented. The geometry of the shell is given only by the reduced information consisting in nodes and normals on its middle surface corresponding to a coarse mesh.
Destuynder, Philippe   +2 more
core   +4 more sources

Pellet Printing for Soft Robotic Devices

open access: yesAdvanced Science, EarlyView.
Fused Granulate Fabrication (FGF) is established here as a reliable method for fabricating soft, airtight robotic devices. Through coordinated optimization of hardware, material selection, and process parameters, this approach enables high‐speed printing of thermoplastic elastomers with silicone‐like softness and modulus.
Yijia Wu   +6 more
wiley   +1 more source

Oceanic three-dimensional Lagrangian Coherent Structures: A study of a mesoscale eddy in the Benguela ocean region [PDF]

open access: yes, 2012
We study three dimensional oceanic Lagrangian Coherent Structures (LCSs) in the Benguela region, as obtained from an output of the ROMS model. To do that we first compute Finite-Size Lyapunov exponent (FSLE) fields in the region volume, characterizing ...
Artale   +59 more
core   +3 more sources

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