Abstract With the rapid development of China's transportation industry in recent years, construction glass suspension bridge has become a hot spot. In order to analyze internal force and stress distribution each component unit under equilibrium state free cable, finite element model was established by Midas/Civil software analyzed cable. The analysis results showed that structural simulation condition line with actual project. cable structure can use characteristics different explore faster...

Concrete materials are subjected to a complex coupled environment of temperature, humidity, and salt ions when in coastal area during the summer. Geopolymer concrete (GPC), as one best alternatives ordinary silicate concrete, was explored this study investigate its mechanical damage under wet-hot-salt environment, understand strengthening mechanism properties by polyvinyl alcohol fibers (PF), which crucial for application GPC engineering. To achieve this, series experiments were conducted...

A simple Cl2/Ar plasma chemistry without additional sample heating is found to produce etch rates above 1 μm/min for InP under high microwave power (1000 W) electron cyclotron resonance conditions. While the rate increases essentially linearly with Cl2 composition root-mean-square (RMS) surface roughness measured by atomic force microscopy strongly dependent on Cl2-to-Ar ratio. Under optimized conditions (10Cl2/5Ar), RMS of ∼2.6 nm obtained samples etched more than μm, a typical unetched...

In current guidelines, the free air blast loads (overpressure and impulse) are determined by spherical charges, although most of ordnance devices more nearly cylindrical than in geometry. This may result a great underestimation near field lead to an unsafe design. However, there is still lack systematic quantitative analysis generated from charges. this study, numerical model developed using hydrocode AUTODYN investigate influences aspect ratio orientation on center-initiated done examining...

The reinforced concrete (RC) structural component might suffer a great damage under close-in explosion. Different from distant explosions, blast loads generated by the explosion are non-uniformly distributed on and may cause both local failure. In this study, an experimental study was conducted to investigate dynamic responses of RC beams double-end-initiated explosions. results show that distribution is much more non-uniform than those single-point detonation, which caused...

Plasma-induced damage of InGaN/GaN multiple quantum well (MQW) light-emitting diodes (LEDs) has been studied in terms forward turn-on and reverse breakdown voltages, together with etch rate surface morphology. The physical degradation sidewall along rough morphology n–GaN caused by increased ion scattering induced the deterioration voltages. voltage was relatively independent pressure up to 20 mTorr. showed worst at 75% Cl2 mainly because a contamination. It found that is sensitive roughness...

High strain-rate induced from intense dynamic loadings will cause an obvious enhancement of concrete material frequently used in civil and defense engineering, which plays important role correct numerical simulations members subjected to loadings. In this article, the existing three approaches for are compared by aspects, that is, flexibility fitting data, consistency condition, time-dependent behavior. The so-called “overstress approach” is found be not flexible high data unable well...

Cost and safety are important considerations when designing the thickness of a protective reinforced concrete shelter. The blast perforation limit (BPL) is minimum shelter that resists under loading. To investigate influence depth embedment (DOE) length-to-diameter ratio (L/D) an explosive charge on BPL, results explosion test using slender partially embedded in slab were used to validate refined finite element model. This model was then applied conduct more than 300 simulations with...

The projectile may detach from the target during penetration, while reattachment or not occur after separation. This phenomenon is termed as wake separation and reattachment. Firstly, a general framework of rigid penetration with both free-surface effects presented implemented into ABAQUS. methodology eliminates need for discretizing well complex contact algorithm. Secondly, verified by comparison between experimental data simulation results in terms depth residual velocity trajectory. It...

Abstract Buildings in service are severely affected by the complex environment with multiple coupled factors such as high temperatures, humidity, and inorganic salt attack. In this work, mechanical properties of nano-SiO 2 -reinforced geopolymer composites (NSGPC) incorporated varying dosages polyvinyl alcohol (PVA) fibers were investigated under a environment. A simulated environmental chamber was employed to simulate relative temperature, NaCl solution concentration 100%, 45°C, 5%,...

A simple Cl2/Ar plasma chemistry can provide smooth, high-rate etching of InP, InAs, InGaAs, A1InAs, and InGaAsP at room temperature under conditions in which there is a balance between formation sputter desorption the normally involatile InCl3. When neutral/ion ratio either too high or low, surface roughening apparent due to presence InCl3, preferential loss group V element. The has been investigated as function microwave power (600–1000 W), rf (0–300 process pressure (1.5–10 mTorr), Cl2:Ar...