Results 91 to 100 of about 1,395,416 (247)

Properties evolution of flax/epoxy composites under fatigue loading [PDF]

open access: yes, 2014
The tension–tension fatigue behaviour of flax fibre reinforced epoxy matrix composites have been investigated for specimens having [0]12, [90]12, [0/90]3S and [±45]3S lay-ups.
GNING, Papa-Birame   +2 more
core   +1 more source

A Modified Nonlocal Macro–Micro-Scale Damage Model for the Simulation of Hydraulic Fracturing

open access: yesModelling
The nonlocal macro–meso-scale damage (NMMD) model, implemented in the framework of the finite element method, has been demonstrated to be a promising numerical approach in simulating crack initiation and propagation with reliable efficacy and high ...
Changgen Liu, Xiaozhou Xia
doaj   +1 more source

Fatigue Behavior of Prestressed Concrete Beam for Straddle-Type Monorail Tracks

open access: yesApplied Sciences, 2018
Monorail transportation systems are widely built in medium and small cities, as well as hilly cities, because of their excellent performance. A prestressed concrete track beam is a key load-carrying structural component and guideway subjected to repeated
Qianhui Pu   +4 more
doaj   +1 more source

Dynamically Actuated Reconfigurable Topographical Surface Enables Active Control of Implant‐Associated Infections

open access: yesAdvanced Functional Materials, EarlyView.
A dynamically actuated reconfigurable topographical surface (DARTS) integrates contact‐mediated bactericidal nanotopography with programmable mechanical actuation to actively disrupt bacterial biofilms. Dynamic surface reconfiguration enhances bacterial killing and suppresses implant‐associated infections in vivo, providing a new strategy for active ...
Mohammad Asadi Tokmedash   +4 more
wiley   +1 more source

Dynamic stiffness of articular cartilage and potential repair materials [PDF]

open access: yes, 2012
Cartilage has limited potential for self repair. Therefore, articular cartilage lesions often lead to early osteoarthritis. Early clinical results of cartilage replacement procedures such as autologous matrix-induced chondrogenesis (AMIC) seem promising,
Ronken, Sarah
core   +1 more source

Passive vibration isolators with high-static-low-dynamic-stiffness [PDF]

open access: yes, 2008
In many engineering applications there is need to reduce the level of vibrations that are transmitted from a source to a receiver. Amongst several different techniques, the most commonly adopted solution is to interpose an isolation mount between the ...
Carrella, Alessandro
core   +1 more source

Seismic enhancement of RC exterior beam-column joints using Ultra High Performance Concrete layers

open access: yesJournal of Applied Science and Engineering
This paper presents an in-depth study of the structural behavior of exterior beam-column joints retrofitted with Ultra High Performance Concrete (UHPC) under reversed cyclic loading.
Viet Chinh Mai   +2 more
doaj   +1 more source

2D Co‐Assembly of Solid Acids Enables Stable Superprotonic Conduction Above 260°C

open access: yesAdvanced Functional Materials, EarlyView.
A two‐dimensional co‐assembly strategy integrates antimony phosphate and phosphotungstic acid nanosheets into free‐standing inorganic lamellar membranes with confined acid–acid interfaces. The resulting interfacial hydrogen‐bond network enables anhydrous proton conductivity exceeding 0.1 S cm−1 at 260°C and supports stable high‐temperature fuel‐cell ...
Qiuning Li   +8 more
wiley   +1 more source

Cyclic Stiffness Degradation in Nonlinear Jackup Dynamics

open access: yes, 2010
SummarySNAME (2002) gives equations to describe degradation of foundation stiffness for jackup spudcans, depending on the size of a load cycle within a yield envelope.
R.. Metters, E.T.R.. T.R. Dean
core   +1 more source

Influences of fatigue stiffness degradation of in-service concrete T-beams on natural vibration frequency

open access: yesJournal of Asian Architecture and Building Engineering
In order to obtain the fatigue stiffness degradation law of in-service concrete T-beam and carry out fatigue life prediction, a dual-stage stiffness degradation model considering cracks was established for T-beams and formulas for calculating the ...
Xin-Dai Zuo   +3 more
doaj   +1 more source

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