Results 71 to 80 of about 1,873,474 (208)
Cratering in glasses impacted by debris or micrometeorites [PDF]
Mechanical strength measurements on five glasses and one glass-ceramic exposed on LDEF revealed no damage exceeding experimental limits of error. The measurement technique subjected less than 5 percent of the sample surface area to stresses above 90 ...
Kinser, Donald L., Wiedlocher, David E.
core +1 more source
First Experimental Observation of Superscars in a Pseudointegrable Barrier Billiard
, 2006 With a perturbation body technique intensity distributions of the electric field strength in a flat microwave billiard with a barrier inside up to mode numbers as large as about 700 were measured.
A. Richter +10 more
core +2 more sources
Development of the weldbond process for joining titanium [PDF]
, 1972 High quality resistance spot welds were produced by welding through epoxy adhesive on titanium alloys. Weldbond joints were consistently stronger than those of either mechanical fasteners, structural adhesive bonds, or mechanical fasteners with adhesive ...
Fields, D.
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Origin and tuning of bandgap in chiral phononic crystals
Communications PhysicsThe wave equation revealing the wave propagation in chiral phononic crystals, established through force equilibrium law, conceals the underlying physical information, such as the essence of the motion coupling and the inertial amplification effect.
Wei Ding +8 more
doaj +1 more source
Experimental Investigation and Safety Classification Evaluation of Small Drone Collision with Humans
BiomimeticsThe safety of small drones in collision with humans has become a key focus in engineering and research fields. This study presents a vertical drop test platform for collision tests involving three representative drones (Air, Mavic 2, and M200) impacting ...
Chunyu Bai +5 more
doaj +1 more source
Determination of the Strain-Free Configuration of Multispan Cable
Shock and Vibration, 2015 For building a reasonable finite element geometric model, a method is proposed to determine the strain-free configuration of the multispan cable. The geometric conditions (the end conditions and the unstretched length conditions) as constraints for the ...
Chuancai Zhang, Qiang Guo, Xinhua Zhang
doaj +1 more source
Hopf Bifurcations of a Stochastic Fractional-Order Van der Pol System
Abstract and Applied Analysis, 2014 The Hopf bifurcation of a fractional-order Van der Pol (VDP for short) system with a random parameter is investigated. Firstly, the Chebyshev polynomial approximation is applied to study the stochastic fractional-order system.
Xiaojun Liu, Ling Hong, Lixin Yang
doaj +1 more source
Early detection of capping risk in pharmaceutical compacts [PDF]
, 2018 Capping is a common mechanical defect in tablet manufacturing, exhibited during or after the compression process. Predicting tablet capping in terms of process variables (e.g.
Cetinkaya, Centin +4 more
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Atheroma Morphology and Mechanical Strength [PDF]
Circulation Research, 2000 Acute clinical cardiovascular events remain the main cause of morbidity and mortality in industrialized societies. Corroborating evidence obtained from classical pathological observation and state-of-the-art imaging shows that fatal events are mainly due to thrombosis triggered by exposure of a disrupted atherosclerotic plaque contents, rather than to ...
openaire +1 more source
Scientific ReportsCeramic microspheres are widely used in various applications, such as nuclear fuel particles in reactors, ZrO2 particles for bone fillers, and SiC particles for precision grinding media.
Haojun Ma +5 more
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