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Numerical Simulation of the Airliner Door under Explosion Impact Loading and Reinforcement Technique
Online since: December 2011
Authors: Dun Wen Zuo, Ying Liu, Yao Hua Wang, Xin Hua Chen, Ji Xian He, Hai Chun Yan
The Prototype Data and the Need for Reinforcement
Airliner door is composed of double aluminum, materials LY12CZ, elastic modulus 71GPa, ultimate strength 414MPa, yield strength 270MPa, elongation 15%, stress-strain curves are shown in Figure 1.
Setting-up of reinforced pieces is difficult to avoid the further reduction of the installation space for explosion-combustion power equipments, but it can not cause the unacceptable impact on the main functional dimension of explosion-combustion power equipments.
Setting-up of reinforced pieces is difficult to avoid the further reduction of the installation space for explosion-combustion power equipments, but it can not cause the unacceptable impact on the main functional dimension of explosion-combustion power equipments.
Online since: November 2013
Authors: Zbigniew Pakiela, Barbara Romelczyk-Baishya, Tomasz Brynk, Anna Jastrzębska, Katarzyna Nowak
The data sets for which it was not possible to obtain required similarity between model (after parameters fitting) and DIC measurements were omitted.
Obtained results showed the necessity of the improvement of casting process in terms of the reduction of the residual porosity.
Obtained results showed the necessity of the improvement of casting process in terms of the reduction of the residual porosity.
Online since: April 2014
Authors: Alexey V. Ognev, Ludmila A. Chebotkevich, Gleb Tregubov, Evgeniy Mikoluk, Alexander S. Samardak, Maxim E. Stebliy
With reduction of the size of nanostructures below 100 nm, the control of their shape becomes more difficult due to the limit of lithography resolution.
The best agreement between experimental and calculated data was observed in the case of exponential approximation , where a, b and c are the fitting coefficients.
The best agreement between experimental and calculated data was observed in the case of exponential approximation , where a, b and c are the fitting coefficients.
Online since: May 2015
Authors: Veronika Čapková, Ivana Zetková
In electrical engineering, rapid prototyping is used due to the continuous reduction in the size of components, which are very complicated to manufacture.
Finally, it has the advantage of very fast data retrieval for preparation and production.
Finally, it has the advantage of very fast data retrieval for preparation and production.
Online since: December 2012
Authors: Yuan Chen, Ping Jun Si, Cun Yan Cui, Hua Wang
Introduction
Gas-liquid separation mechanisms for on-orbit resupply and manned spacecraft have traditionally presented major problems in ground test and flight applications[1].Reduction in the magnitude of the gravity vector will have a profound effect not only on the gas-liquid flow behavior, but also on the technologies that will be required for future space-based platforms[2].
[2] Mcquilen John, Motil Brian, Reduced gravity gas and liquid flows: simple data for complex problems, R.
[2] Mcquilen John, Motil Brian, Reduced gravity gas and liquid flows: simple data for complex problems, R.
Online since: February 2015
Authors: Victor Sachkov, Tatyana D. Malinovskaya, Roman A. Nefedov, Ouna B. Sambueva
Fluoride metallurgy, as a complex of technological processes of preparation, cleaning and reduction of fluorides to metals, has been applied primarily in the nuclear industry [3].
From the figure, it is seen that: - at temperature 60 °C ions with mass equal to 19, the hydrogen fluoride are recorded, the lowest intensity of the mass spectrum indicates a slight evolution of hydrogen fluoride from the sample, on the spectrum of X-ray phase analysis the mixture of starting substances is observed; - in the temperature range of 100 °C, the typical mass spectrum of water with insignificant impurities of hydrogen fluoride is observed, the composition according to data of X-ray phase analysis is not changed; - in the temperature range of 135 °C the emission of ammonia is observed that in agreement with the known mechanism of melting of ammonium fluoride with decomposition and the formation of ammonium bifluoride with the evolution of ammonia and the formation of the eutectic mixture NH4F/(NH4F×HF) [5], on the spectrum of X-ray phase analysis the reflexes of ammonium fluoride disappeared that indicates on its melting; - at higher temperature (210 °C) the ammonia continues
From the figure, it is seen that: - at temperature 60 °C ions with mass equal to 19, the hydrogen fluoride are recorded, the lowest intensity of the mass spectrum indicates a slight evolution of hydrogen fluoride from the sample, on the spectrum of X-ray phase analysis the mixture of starting substances is observed; - in the temperature range of 100 °C, the typical mass spectrum of water with insignificant impurities of hydrogen fluoride is observed, the composition according to data of X-ray phase analysis is not changed; - in the temperature range of 135 °C the emission of ammonia is observed that in agreement with the known mechanism of melting of ammonium fluoride with decomposition and the formation of ammonium bifluoride with the evolution of ammonia and the formation of the eutectic mixture NH4F/(NH4F×HF) [5], on the spectrum of X-ray phase analysis the reflexes of ammonium fluoride disappeared that indicates on its melting; - at higher temperature (210 °C) the ammonia continues
Online since: December 2014
Authors: Xin Zhao, Wei Ping Zhao, Song Xiang
Mathematical model of quadrotor UAV
Yang [4] proposed the transfer function of roll channel for quadrotor UAV as follows:
(1)
The rotor system involves controller, elctric motor, reduction box, rotor, and speed sensor.
The crossover operation mixes the binary number by swapping a portion of the data structure
The crossover operation mixes the binary number by swapping a portion of the data structure