Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: March 2019
Authors: THANH CONG NGUYEN
The calculation to find the specific vibration frequency of the body frame structure has studied and it is a part of the field of noise vibration control and reduction in cars [1, 3, 4].
Therefore, in order to accurate depict the car body framework, to be convenient for calculating and processing data, the structural fragmentation techniques was used.
The finite element modeling of the entire car body shell structure is performed on HyperMesh by meshing and processing the generated geometric model links through the transfer of model image data from Catia software to Hypermesh software.
Table 2 Statistics data of finite element model of the car body Element type Node Quadrilateral Triangle CWELD RBE2 Quantity 170860 650 5825 182 182762 Triangle element occupies 0.38 [%] After completing finite element modeling, define the material properties in the body structure.
Therefore, in order to accurate depict the car body framework, to be convenient for calculating and processing data, the structural fragmentation techniques was used.
The finite element modeling of the entire car body shell structure is performed on HyperMesh by meshing and processing the generated geometric model links through the transfer of model image data from Catia software to Hypermesh software.
Table 2 Statistics data of finite element model of the car body Element type Node Quadrilateral Triangle CWELD RBE2 Quantity 170860 650 5825 182 182762 Triangle element occupies 0.38 [%] After completing finite element modeling, define the material properties in the body structure.
Online since: January 2019
Authors: Ahmed Rassili
The solution not only combines the different mechanical properties in one tool but also has a economical benefit as it offers tool cost consequent reduction.
In reference to data of Fig. 3 (a), used materials could easilty reach this limit if some experimental considerations are not taken into account as we will show later.
In combining results of Figs. 5 and 6 and data of Fig. 3, one could conlculde that in any case, in order to deal with a safe thixoforming process adequate and treatment should be combined.
Leveque, Tool steels: Unormalised numerical data, on http://www.techniques-ingenieur.fr [8] J.
In reference to data of Fig. 3 (a), used materials could easilty reach this limit if some experimental considerations are not taken into account as we will show later.
In combining results of Figs. 5 and 6 and data of Fig. 3, one could conlculde that in any case, in order to deal with a safe thixoforming process adequate and treatment should be combined.
Leveque, Tool steels: Unormalised numerical data, on http://www.techniques-ingenieur.fr [8] J.
Online since: September 2017
Authors: Yuri M. Kosichenko, O.A. Baev
The development of geomembrane compositions of fresh polymeric raw materials combined with geotextile in single material aims to create a highly reliable anti-seepage materials as compared to currently widely-used 1.0-3.0 mm thick geomembranes, which will ensure the reduction of their damage 5 to 10 times and, respectively, permeability of 1 to 2 orders of magnitude [6,7].
The criteria of technical efficiency and operational reliability of impervious coating from geomembrane compositions are suggested by the authors [8] as follows: - by geomembrane compositions waterproof properties: ; (1) - by geomembrane compositions strength: ; (2) - by durability (service life) of geomembrane composition coatings: ; (3) - by the probability of geomembrane coating compositions flawless operation: ; (4) where and being respectively averaged from studies and estimations data and allowable filtration factor of geomembrane compositions coating
; and being respectively tensile strength of geomembrane compositions based on tests results and standards; and being respectively service life of geomembrane compositions coating based on observation data and standards; and being respectively estimated and rated probability of flawless service of geomembrane compositions coating.
The waterproof value of geomembrane composition impervious coatings can be found based on test data under natural conditions or with estimated dependencies, obtained by solving problems mathematically with filtration theory methods using complex variable and conformal mapping functions theory methods.
The criteria of technical efficiency and operational reliability of impervious coating from geomembrane compositions are suggested by the authors [8] as follows: - by geomembrane compositions waterproof properties: ; (1) - by geomembrane compositions strength: ; (2) - by durability (service life) of geomembrane composition coatings: ; (3) - by the probability of geomembrane coating compositions flawless operation: ; (4) where and being respectively averaged from studies and estimations data and allowable filtration factor of geomembrane compositions coating
; and being respectively tensile strength of geomembrane compositions based on tests results and standards; and being respectively service life of geomembrane compositions coating based on observation data and standards; and being respectively estimated and rated probability of flawless service of geomembrane compositions coating.
The waterproof value of geomembrane composition impervious coatings can be found based on test data under natural conditions or with estimated dependencies, obtained by solving problems mathematically with filtration theory methods using complex variable and conformal mapping functions theory methods.
Online since: March 2012
Authors: Saowaroj Chuayjuljit, Thatisorn Karnjanamayul
The tensile data of the neat PP, PP/EPDM blends and PP/EPDM/wollastonite composites are summarized in Fig. 2 and Table 1.
The reduction in the tensile strength and Young’s modulus and the increase in the elongation at break are related to the incorporation of low strength and modulus EPDM elastomer into the PP matrix.
Table 1 Tensile data of the neat PP, PP/EPDM blends and PP/EPDM/wollastonite composites.
Table 2 TGA data of the neat PP, PP/EPDM blends and PP/EPDM/wollastonite composites.
The reduction in the tensile strength and Young’s modulus and the increase in the elongation at break are related to the incorporation of low strength and modulus EPDM elastomer into the PP matrix.
Table 1 Tensile data of the neat PP, PP/EPDM blends and PP/EPDM/wollastonite composites.
Table 2 TGA data of the neat PP, PP/EPDM blends and PP/EPDM/wollastonite composites.
Online since: May 2012
Authors: Wan Bo Qu, Yan Li
With this method, designers used to design anti-slide piles by looking up datum in various of design manuals and it would be a burdensome task.
A lot of stabilizing measures could be used to retain the slope, among which, the following were widely used: groundwater drainage, load reduction, reinforcing the toe of the slope, improving the mechanical features of stratum and supporting the slope with some structures.
Check whether these datum meet the termination conditions or not.
Hence, we adopted a set of datum according to current market to search the geometry sizes of anti-slide pile in this case.
Main datum in relation to the prices of anti-slide piles materials and payment for excavating were given in Table 1 and the outputs based on these datum were listed out in Table 2.
A lot of stabilizing measures could be used to retain the slope, among which, the following were widely used: groundwater drainage, load reduction, reinforcing the toe of the slope, improving the mechanical features of stratum and supporting the slope with some structures.
Check whether these datum meet the termination conditions or not.
Hence, we adopted a set of datum according to current market to search the geometry sizes of anti-slide pile in this case.
Main datum in relation to the prices of anti-slide piles materials and payment for excavating were given in Table 1 and the outputs based on these datum were listed out in Table 2.
Online since: October 2013
Authors: Li Ping Sun, Zheng Liu, Chen Xing Yang, Ze Fu Zhang
Although there is a difference, but it has been proved that the data is quotable.
(5)Ignore the area reduction of multilayer CFRP in the simulation of ANSYS
Therefore, in the simulation of ANSYS, direct correlation of the mid-span deflection react the changes of stiffness. 3.1.1The stiffness analysis of RC beams with different initial load The minimum of yield load to unreinforced beams is 109.0KN, according to design, the range of loading to contrast is 63.78KN-109.0KN, and three sets of data selecting should be contrasted.
As shown in tab.3,camparing the data of Fi=42.52KN's with direct reinforced beams' with same layer of CFRP, we can find that the stiffness of L1-4 decrease 9.8%;and the L2-4's which Fi=63.78KN decrease 13.4%.It means that under the same layer of CFRP the high initial load, the more stiffness decreases compared to the direct reinforced beams.
(5)Ignore the area reduction of multilayer CFRP in the simulation of ANSYS
Therefore, in the simulation of ANSYS, direct correlation of the mid-span deflection react the changes of stiffness. 3.1.1The stiffness analysis of RC beams with different initial load The minimum of yield load to unreinforced beams is 109.0KN, according to design, the range of loading to contrast is 63.78KN-109.0KN, and three sets of data selecting should be contrasted.
As shown in tab.3,camparing the data of Fi=42.52KN's with direct reinforced beams' with same layer of CFRP, we can find that the stiffness of L1-4 decrease 9.8%;and the L2-4's which Fi=63.78KN decrease 13.4%.It means that under the same layer of CFRP the high initial load, the more stiffness decreases compared to the direct reinforced beams.
Online since: October 2011
Authors: Tae Won Park, Sung Pil Jung, Hyun Seok Song, Won Sun Chung
In part.2, the simulation model of an actual disc brake system is created, and analysis results are compared to the dynamo test data.
Analysis strategy based on the staggered approach In the monolithic approach [14], two different analysis domains such as the dynamic and thermal system are solved simultaneously and data is exchanged at the iteration level.
In part 2 of this paper, the analysis technique will be applied to an actual disc brake module, and the simulation results will be compared with the dynamo test data References [1] K.
Zagrodzki, “Eigenvalue solution of thermoelastic instability problems using Fourier reduction”, Proc.
Analysis strategy based on the staggered approach In the monolithic approach [14], two different analysis domains such as the dynamic and thermal system are solved simultaneously and data is exchanged at the iteration level.
In part 2 of this paper, the analysis technique will be applied to an actual disc brake module, and the simulation results will be compared with the dynamo test data References [1] K.
Zagrodzki, “Eigenvalue solution of thermoelastic instability problems using Fourier reduction”, Proc.
Online since: October 2010
Authors: Qian Zhu, Feng Lan Li
Based on the studies [8], there are four effects of stone powder on concrete shrinkage: the filling effect results in the fineness of pores and reduction of pore rate, the crystal nuclei effect leads to the accelerated hydration of C3S, the active effect improves the surface state due to the reaction of partial CaCO3 in stone powder with C3A in cement and enhances the bond-strength between particle of stone powder and hydration products, the water absorption effect reduces the gather of free-water on boundary surface and improves the border of paste and aggregate.
Based on the tests, the statistical constants can be determined by the fitness of formula (1) with test data.
The fitness of test data with formula (1) are shown in Fig. 3.
Table 6 The values of statistical constants of formula (1) Statistical constant Stone powder content 7% 3%-5% 10%-16% a -9.20 32.97 16.53 b 72.93 90.83 82.92 Relation coefficient 0.998 0.996 0.996 Fig.3 Fitness of all test data Conclusions The drying shrinkage of concrete with proto-machine-made sand is affected by the complex effects of stone powder on internal forms of hardened concrete.
Based on the tests, the statistical constants can be determined by the fitness of formula (1) with test data.
The fitness of test data with formula (1) are shown in Fig. 3.
Table 6 The values of statistical constants of formula (1) Statistical constant Stone powder content 7% 3%-5% 10%-16% a -9.20 32.97 16.53 b 72.93 90.83 82.92 Relation coefficient 0.998 0.996 0.996 Fig.3 Fitness of all test data Conclusions The drying shrinkage of concrete with proto-machine-made sand is affected by the complex effects of stone powder on internal forms of hardened concrete.
Online since: August 2013
Authors: Ya Nan Zhang, Lin Zhi Sun, Lin Yong Shen, Cheng Gang Wang, Ge Pan
The accuracy of the mechanism is an important technical indicator, the theory is:
(5)
Wherein, p is the screw pitch, α is the subdividing number of the motor, β is the reduction ratio of the harmonic reducer.
According to the position of target recorded, we calculate the stepping length, the data shown in Figure 6.
The software records two data per second, a total of 3600 points.
The specific data is shown in Figure 8.
According to the position of target recorded, we calculate the stepping length, the data shown in Figure 6.
The software records two data per second, a total of 3600 points.
The specific data is shown in Figure 8.
Online since: September 2016
Authors: Chaiyoot Meengam, Siva Sitthipong, Prawit Towatana, Amnuay Sitticharoenchai
According to the data from the site survey, all Cut-stern Kolek Boats have been encountered with the aforementioned problems.
Since the machine for fatigue testing has a limitation on weight, which can be test between 5-40 kilograms, the reduction of specimens’ diameter is needed in order to increase the weight of testing.
By using the stress from real loading= 517 MPa to analyze with the life prediction equation of each type of weld metals from the data in Eq. 2, it was found that the Shield Metal Arc Welding Process gave the working cycle of 60,580.
By means of combining the data of material properties with mechanical properties, a diagram demonstrating the range of failure could be observed.
Since the machine for fatigue testing has a limitation on weight, which can be test between 5-40 kilograms, the reduction of specimens’ diameter is needed in order to increase the weight of testing.
By using the stress from real loading= 517 MPa to analyze with the life prediction equation of each type of weld metals from the data in Eq. 2, it was found that the Shield Metal Arc Welding Process gave the working cycle of 60,580.
By means of combining the data of material properties with mechanical properties, a diagram demonstrating the range of failure could be observed.