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, Tehran Central South University Press and Springer-Verlag Berlin Heidelberg 2017 Abstract: Permanent deformation or rutting, one of the most important distresses in flexible pavements, has long been... is one of the most important distresses for asphalt pavements. It is caused by material consolidation and lateral movement due to repeated heavy wheel loadings on the various pavement layers/subgrade......
to the complicated metal-flow pattern and stress state, it can be expected that the dynamic responses of the metals under hot forging, hot rolling and hot extrusion are different, which will result in unruly......
dioxide emissions due to the fact that one quarter of the world total energy was consumed by transport [1]. An authoritative survey report from the Ministry of Environmental Protection of China... or hydrogen fueled vehicles is to develop a practical hydrogen storage system [3]. Among hydrogen storage methods, hydrogen storage in metal hydrides is considered to be one of the most promising alternatives......
since the unit and range in one data concatenation may differ from the others. Data pre-processing is a means of converting the original sequence to a comparable sequence. There are various... of grey relational coefficient and grey relational grade. To measure the relevancy between two systems or two sequences, the grey relational grade is required. When only one sequence, x0(k......
The helical gear transmission system is one of the most important and popular systems for motion and power transmission. Dynamic analysis is important and necessary in describing noise and durability... system. The gear mesh on the contact lines was reduced to two stiffnesses: a translational one and a twist one. VELEX et al [39] introduced a mathematical model for analyzing the gear dynamic......
behaviour 1 Introduction Mg alloys show potential use as lightweight structural materials, due to their satisfactory specific strength. However, one of the main obstacles that impede the use of Mg alloys... alloys with high strength [2]. ZK (Mg-Zn-Zr) alloys are one of the highest strength commercially available alloys [3]. ZK60 has the highest strength among the ZK series and among most Mg alloys. However......
(a), in the process without free forging, there is no obvious peak for the SPS, homogenization or solution treatment steps. The free forged sample shows one endothermic peak while heating and two... the deformed and undeformed samples after aging showed one-way transformation during heating and two-way transformation during cooling. Figure 11(b) shows that the martensitic transformation peak......
controller as an adaptive backstepping sliding mode controller. The rolling angle f system in Eq. (10) can be expressed as the following form: ..., as shown in Figure 3. Figure 3 Quadrotor UAVs and flow simulation The two wind curves from the flow simulation results which pass through the centroid of aircraft are extracted. In curve 2 and curve......
by a Fluke Raytek infra-red pyrometer through the openings in the insulation cylindrical cover and alumina crucible, which is possible since infra-red rays can pass through the setup to reach the sample... be divided into three main regions, as shown in Fig. 7(c) [62]. The first one is a region of the linear-elastic deformation, and its slope is considered as the elastic modulus of these samples, followed......
. As reported in Refs. [6–8], a high level of Li usually facilitates the formation of the metastable δ' phase. When the Li concentration is low [9–11], the alloys prefer to form T1 or θ', and which one...%). Tensile samples were cut from the 1/2 depth of the plate and parallel to the rolling direction (RD) of the plate. Each test sample was solution treated at 520 °C for 1 h and then water quenched......
