Abstract Covalent adaptable network (CAN) polymers doped with conductive nanoparticles are an ideal candidate to create reshapeable, rehealable, and fully recyclable electronics. On the other hand, 3D printing as a deterministic manufacturing method has significant potential fabricate electronics low cost high design freedom. In this paper, we incorporate composite consisting of polyimine CAN multi-wall carbon nanotubes into direct-ink-writing polymeric sensors outstanding reshaping,...

This study provides a clear insight into the dynamic response of rectangular plates subjected to repeated impacts using experimental and numerical methods. Repeated are performed on mild steel with length-to-width ratio 3, which can be regarded as scaled-down ship plates. During experiments, both fracture pseudo-shakedown phenomena observed, occurring under relatively high low impact velocities, respectively. By thoroughly analysing various parameters related response, including plate...

Carbon dioxide phase transition fracturing has been widely used in rock mass excavation under complex environments, and its special breaking process shows obvious gathering energy effect. In this paper, the effect of technology is considered then impact reduction coefficient defined determined. Eventually, a combined method field tests numerical simulations to study crack propagation characteristics spatiotemporal changes dynamic response. The results show that cracks grow more slowly as...

The pseudo-shakedown behaviour of elastoplastic rectangular plates, made from mild steel or aluminium alloy, subjected to repeated impacts is studied using a numerical simulation method. In previous study simple critical displacement-based criterion was proposed predict and the concepts two displacements, namely 'necking displacement' 'failure have been proposed. wide applicability this displacement re-examined in study. To quickly precisely estimate magnitudes these it shown that them...

This paper studies the stiffening effects of material strain rate sensitivity and hardening on saturated impulse elastic, perfectly plastic plates. Finite element (FE) code ABAQUS is employed to simulate elastoplastic response square plates under rectangular pressure pulse. Rigid-plastic analyses for impulse, which consider hardening, are conducted. Satisfactory agreement between finite models (FEM) predictions rigid-plastic analysis obtained, verifies that proposed methods effective solve...

In this study, great efforts were paid to investigate noise reduction in a cylindrical cavity with melamine foam (MF) lining within the low-medium frequency range (100–400 Hz). theoretical studies, MF was generally regarded as impedance boundary according Johnson-Champoux-Allard (JCA) model. context, natural frequencies of presence locally and non-locally reacting liners derived from theories lining. Moreover, experiments conducted without lining, which consistent results demonstrated higher...

For the issue concerning internal noise reduction of Al-made cylindrical shell structure, control method laying melamine foam (MF) layer is adopted for in-shell attenuation experiments Al and Al/MF shells corresponding response spectrograms are obtained. Based on Virtual.Lab acoustics software, a finite element model established analysis in cylinder numerical simulation computation conducted acoustic mode response; correctness verified via comparison with measured data. On this basis,...

In this paper, the saturated impulse phenomenon is investigated for elastic-plastic square plates under rectangular pulse loading. Dynamic response (e.g. deflection-time curve) of simulated by employing finite element (FE) code ABAQUS. Numerical results show that two impulses exist an plate: one maximum deflection and other permanent deflection, are compared with obtained from rigid-plastic analysis. The in high load range lie between upper lower bounds Furthermore, scaling effect on...

Brackish water was treated with reverse osmosis process. The fouling mechanism of RO and its control method studied. In the treatment brackish water, salt removal efficiency above 95% effluent quality up to standard for drinking (GB5749-2006). SDI influent less than 5 after raw pretreated by combination coagulation sedimentation process filtration process, which met demand influent. If ultrafiltration added, pre-treatment better. Coagulation precipitation not very effective dissolved organic...

A series of experiments were performed for toluene removal from a gaseous influent at normal temperature and atmospheric pressure by adsorption & non-thermal plasma strength nano-catalysis technology. Non-thermal was generated dielectric barrier discharge. Sorbent nano-catalyst called combined catalyst which included MnO2/γ-Al2O3 nano-Ba0.8Sr0.2Zr0.1Ti0.9O3 catalyst. has an advantage ozone removal, while is kind good material improving energy utilize rate. The results showed the...

Real-time video streaming over wireless links imposes strong demands on codecs and quality of networks. Many measures are made to design proper routing protocols channel assignments (CAs) for multi-channel multi-interface (MCMI) networks, since it can provide higher performance than single channel. However, there still has not been a well-studied proposal guarantee real-time in this situation. Hence, motivates us explore the potential synergies exchanging information between different layers...

Based on the problem of industrial wastewater 4-Toluene Sulfonic Acid (4-TSA) with characteristics high concentration and toxicity, also low treatment efficiency by common biological , this study was used aerobic fluidized bed (ABFB) to analyze impact 4-TSA changing water load chemical oxygen demand (COD), aeration amount, pH value input water, so technological parameters. The result showed that average degradation rate in can researched 96.9% under condition reactor steadily running, HRT=9...

This paper presents the results of eight seismic performance tests on end-perforated reinforced concrete beams strengthened with carbon-fibre-reinforced polymer sheets. The had different sizes perforations and strengthening arrangements were subjected to hybrid load–displacement control loading conditions. ultimate load resistance, hysteretic performance, energy dissipation capability, ductility stiffness degradation without investigated. test show that have better beam perforation size has...

Nano-catalyst was prepared in the lab. Non-thermal plasma generated by dielectric barrier discharge (DBD). Through nano-catalyst coupled with non-thermal plasma, a series of experiments for toluene decomposition were carried out. Based on reactor input energy density and removal efficiency inhibition O 3 formation, load amount MnO x catalyst surface γ-Al 2 pellets compared experiment. The results show catalysis performance 10 wt% /γ-Al resulted higher better efficiency. At same time,...

The great amount of resource consumption and the depletion metal rich primary ores are main driving forces to develop utilize valuable hiding in urban mines. Although mining possesses several advantages such as lower energy consumption, less cost easier pollution than conventional mining, various wastes generated become a burden for society because poor organization production implementation strict environmental regulations. This paper investigated problems characterization development...