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Online since: February 2012
Authors: Matthijn de Rooij, Bo Cornelissen, Remko Akkerman, Bert Rietman
Composites forming processes involve mechanical interactions on the ply, tow, and filament level.
A thorough understanding of the frictional properties of individual filaments is essential to understand and to predict the macroscopic deformations of a fabric during forming.
Introduction The deformations that occur in composites forming processes mainly result in compaction and shear loads, which both depend on the frictional properties of the fibrous tows.
The macro deformation behaviour of the fabric is determined by the individual tow properties.
In this research, however, the surface properties were assessed in the range of 0.01–1 μm without accounting for the fractal nature of surface roughness.
Online since: December 2025
Authors: Ling Yu Sun, Bing Yan Shi, Jia Xing Sun, Ri Han Wang
Crucially, the natural frequencies of laminates depend on mass and stiffness properties.
Section 2 outlines material properties and FE modeling.
Table 1 [14] presents the properties of carbon fiber-reinforced polyamide 6 (CF/PA6).
Materials properties of CF/PA6 laminates [14].
Increasing FOAs minimally affects nodal line positions.
Online since: June 2013
Authors: Ming Xia Yang, Wei Jie Wang, Xin Jun Chen, Wei Guo Qian, Xiang Hong Kong
At present, partial fishing machines are single controlled and work with staffs, it will affect the capture efficiency.
Jigging machine more used in the scene is complex occasions, such as harsh environment, many disturbing factors maritime etc.
In order to avoid the bus communication affect to the master system, we use the way of the optical coupler isolation.
(3) PC receives the return address from the slave, modifies the properties, Settings =“9600,S,8,1”, prepares to issue orders.
[4] GulaiNi:submitted to Fishery mechanical instrument(1996), In Chinese
Online since: December 2012
Authors: Sarim Al-Zubaidy, Serik Tokbolat, Raikhan Tokpatayeva
Fig. 1 highlights the factors that can present a global solution by reducing energy consumption through implementing passive design strategies and use of renewable resources.
These factors can be utilized, by careful design, for the benefit of the building, in light of energy consumption [2].
However, a proper design could help reduce the mechanical load to great extents.
The scope of the current study does not permit examining the effect of all of the above factors, emphasis will be placed on buildings orientation and configurations.
This analysis tool is used to calculate the distribution of temperature, velocity, pressure and other properties of fluids, in other words, to provide data on temperature and airflow distribution in and around considered buildings.
Online since: June 2025
Authors: William Baya Mwaro, Mahlatse Ramaesele Mphahlele, Mark Walker
This effect has been associated with the current density and/or the magnetic properties of the materials involved [9, 10].
Another mechanism affecting diffusion processes described in the context of microelectronics is thermomigration in which atomic diffusion takes place under the influence of a temperature gradient [11].
These findings suggest that SPS can be a highly effective technique for improving the diffusion properties of metallic alloys.
Aigbodion, High entropy alloys prepared by spark plasma sintering: Mechanical and thermal properties, Materials Today Sustainability. (2023) 100639
Devaraj, A review of the metastable omega phase in beta titanium alloys: the phase transformation mechanisms and its effect on mechanical properties, International Materials Reviews. 68 (1) (2023) 26-45
Online since: June 2014
Authors: Rustam Kaibyshev, Sergey Malopheyev
Mechanisms of dynamic recrystallization in aluminum alloys Rustam Kaibyshev1,a,*, Sergey Malopheyev1,b 1Laboratory of Mechanical Properties of Nanostructural Materials and Superalloys, Belgorod State University, Pobeda 85, Belgorod 308015, Russia arustam_kaibyshev@bsu.edu.ru, bmalofeev@bsu.edu.ru Keywords: aluminum alloys, thermomechanical processing, ultrafine grained structure, severe plastic deformation Abstract.
Temperature, deformation process and distribution of secondary phases strongly affect the CDRX mechanism.
The rate of the dynamic grain refinement is controlled by CDRX mechanism that, in turn, is strongly affected by the phase composition of aluminum alloys and the deformation temperature [7,10,14].
Therefore, under cold working the deformation technique is the main factor providing the formation of a granular structure instead of a lamellar one.
The chosen deformation technique, deformation conditions and the chemical composition of aluminum alloys highly affect the process of grain refinement through their influence on the mechanism of CDRX.
Online since: May 2014
Authors: A. Erman Tekkaya, Ramona Hölker, Nooman Ben Khalifa, Matthias Haase
Between container and billet, as well as between die and billet, sticking friction condition was set except from the area of the die bearings, where a shear friction factor of m=1 was used [9].
The explanation for this can be that the crack initiation is affected not only by the temperature, but also by the deformation and the stress state [10].
The die cooling also affected the microstructure of the extruded profiles.
Hence, the die cooling allowed not only avoiding crack formation, but also reduced the formation of coarse grains, which would lower the mechanical properties of the profiles.
The fine-grained microstructure acquired with cooling is supposed to improve the mechanical properties of the fabricated profiles.
Online since: November 2013
Authors: Kevin Hapeshi, Xu Zhang, Shu Jun Zhang
While the geometrical features of human faces are freeform surfaces with complex properties, it is the fundamental requirement for the model to have the ability of representing both primitive and freeform surfaces.
The other important properties of the B-Spline basis function are also shown in Eq. (1).
This is called local support property which means the shape of the curve is only affected by a certain number of control points.
It can be changed freely by either control points or weights factors.
Compact robot face with simple mechanical components.
Online since: October 2010
Authors: Fu Zhen Xuan, Jin Quan Guo, Li Xin Wang
Creep Based Prediction Model of Stress Relaxation Behavior for High Temperature Materials Jinquan Guo 1, a , Lixin Wang1, b and Fuzhen Xuan2, c 1 School of Mechanical Engineering, Anyang Institute of Technology, Anyang, China 2 School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, China a yefu111@163.com, b wanglixindhg@163.com, c fzxuan@ecust.edu.cn Keywords: Creep-relaxation conversion, Stress relaxation performance, Prediction method, Creep rate model, High temperature materials Abstract.
The scatter in creep rupture data can affect the estimated stress relaxation behavior significantly and result in lower conversion precision.
A material property that encompasses both of these concepts is the average creep rate to rupture, avε� , which is defined as /r rtε , where rε is simply the strain obtained by extending the secondary-creep-rate curve up to rt , and rt , is the rupture time, as illustrated in Fig.1.
So it must needs to use a Fig. 1 Schlottner-Seeley creep assessment procedure correction factor ξ to revise the average creep rate, so that it approaches the relaxation rate.
[2] F.V.Ellis, T.Sebastian: Calculation of stress relaxation properties for type 422 stainless steel.
Online since: September 2013
Authors: Maurizio Piazza, Ivan Giongo, Roberto Tomasi
After the calibration of a numerical model that helped in understanding the “cambering phenomenon”, the following analytical formulation has been proposed: (1) where: · α = [(kc EJ∞)/( EJ0 EA0)]0.5; · EJ0 is the flexural stiffness of the composite beam with no mechanical connections; · n is the total number of fastener couples arranged along the beam
The resulting formula for determining the upward camber (given the mechanical properties of the beams and of the fasteners) has shown the capability of reproducing the experimental behavior with promising accuracy.
It must be noted that test type 6 were affected by a high scattering (CoV = 0.16) and therefore required further investigation.
A probable reason might be found analyzing the pull-through capacity formula which contains the following member: (2) Consequently, providing that the head pull-through capacity is the limiting factor, it can be noted how a wood density 80 % bigger (as it was observed for the chestnut), would yield a pressure increase of 60 %.
It can be seen that the loss was affected by the screw size: the bigger the screw (diameter or thread length) the smaller the reduction.
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