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Online since: August 2020
Authors: Mosa J. Al-Mosawe, Abbas O. Dawood, Abdul Muttalib I. Said
Table 1 summarizes the properties of the tested pipes.
Table 3 summarized the bedding and backfill soil properties.
Figure 6 Description of tests variables Table 3 Bedding and backfill soil properties Test No.
The results of bedding factors are shown in Table 6.
Figure 10 Bedding effect on pipes deflections Figure 11 Vertical stress caused by strip load Table 6 Results of bedding factors Test No.
Table 3 summarized the bedding and backfill soil properties.
Figure 6 Description of tests variables Table 3 Bedding and backfill soil properties Test No.
The results of bedding factors are shown in Table 6.
Figure 10 Bedding effect on pipes deflections Figure 11 Vertical stress caused by strip load Table 6 Results of bedding factors Test No.
Online since: May 2011
Authors: Xiao Long Sui, Ming Sheng He, Xiao Jian Fu
The original research was about the experiment on basic mechanical properties of EPS mixed with sand in Japan in 1989, from then on, study on EPS-soil has gradually developed.
For that reason, study on mechanical properties of EPS-soil as the wall thermal insulation material was carried out by our group, hoping to provide some reference frame for the field development.
We take some constitute materials of the EPS soil block as influencing factors in the experiment, it is a three factors four levels test.
Now you can see the affecting factors and levels in table 1.
EPS content and cement content are the significant factors which affects compressive strength of EPS-soil block according to the variance analysis.
For that reason, study on mechanical properties of EPS-soil as the wall thermal insulation material was carried out by our group, hoping to provide some reference frame for the field development.
We take some constitute materials of the EPS soil block as influencing factors in the experiment, it is a three factors four levels test.
Now you can see the affecting factors and levels in table 1.
EPS content and cement content are the significant factors which affects compressive strength of EPS-soil block according to the variance analysis.
Online since: June 2011
Authors: Ammar A. Mustafa, Khalid A. S. Al-Khateeb, Ahmad Faris Ismail
Mechanical strength is an important factor that has to be analyzed for clinical success of dental restorations.
However, these applications are limited by their mechanical properties.
In addition, aluminum Polycarboxylate is formed after 24 hours and it improves mechanical properties [13] Some studies found that lithium fluoride might adversely affect the compressive strength but it may elongate the setting time [14]. 3M Ketac GIC and Fuji IX have exhibited faster setting time than test-GIC and more viscosity and that might explain the improved mechanical properties of these two materials.
Mechanical behavior of glass ionomer cements affected by long-term storage in water.
Mechanical properties in Restorative dental materials. 10th.
However, these applications are limited by their mechanical properties.
In addition, aluminum Polycarboxylate is formed after 24 hours and it improves mechanical properties [13] Some studies found that lithium fluoride might adversely affect the compressive strength but it may elongate the setting time [14]. 3M Ketac GIC and Fuji IX have exhibited faster setting time than test-GIC and more viscosity and that might explain the improved mechanical properties of these two materials.
Mechanical behavior of glass ionomer cements affected by long-term storage in water.
Mechanical properties in Restorative dental materials. 10th.
Online since: December 2011
Authors: Suradet Tantrairatn, Paphakorn Pitayachaval, Sirisak Rangklang, Jiraphon Srisertpol
This process will help to increase elasticity, strength and corrosion protection to the product therefore this process can affect directly to quality of the printed circuit.
Factor that affects the cover laminating process of the printed circuit is glue, temperature and compression force.
Therefore it has been studied about suitable adhesive formulation for thermal properties of the adhesive after coating the printed circuit and evaluation of adhesive ability between the silicon wafer and ceramic base to compare performance of the adhesive in the electronic industry [1], the adhesive formula improvement for increasing the adhesive endurance properties [2], cove layer manufacturing technology for stepping up adhesive capability between cover layer and circuit board [3], development of testing equipment by IPC-TM650 method using Lab VIEW software to analysis the temperature and time that affect to attachment process and adhesive properties of the flexible damper [4] and a completely random experimental design and application of Taguchi technique to confirm the influence of temperature and time on the percentage of the adhesive [5].
Chansanon and S Tanodgreaw, in Thermal properties of epoxy for using in solar cell.
Tantiwiphanuwong, in Experimental Design by taguchi method for factor study to completely percentage adhesive properties in curing precess.
Factor that affects the cover laminating process of the printed circuit is glue, temperature and compression force.
Therefore it has been studied about suitable adhesive formulation for thermal properties of the adhesive after coating the printed circuit and evaluation of adhesive ability between the silicon wafer and ceramic base to compare performance of the adhesive in the electronic industry [1], the adhesive formula improvement for increasing the adhesive endurance properties [2], cove layer manufacturing technology for stepping up adhesive capability between cover layer and circuit board [3], development of testing equipment by IPC-TM650 method using Lab VIEW software to analysis the temperature and time that affect to attachment process and adhesive properties of the flexible damper [4] and a completely random experimental design and application of Taguchi technique to confirm the influence of temperature and time on the percentage of the adhesive [5].
Chansanon and S Tanodgreaw, in Thermal properties of epoxy for using in solar cell.
Tantiwiphanuwong, in Experimental Design by taguchi method for factor study to completely percentage adhesive properties in curing precess.
Online since: January 2016
Authors: Michael Zinigrad, Maya Radune, Nachum Frage
It was established that SPS-processed specimens display significantly improved mechanical properties compared with those of pure TiN.
The HEBM is a complex process that involves many variables, such as ball to powder ratio, milling speed, ball size, milling time, starting powder size, mechanical properties of the initial powders, milling atmosphere, etc.
It was established that all factors, except the ball to powder weight ratio, are significant.
ANOVA table Factor DOF (f) Sum of Squares (S) Variance (V) F-Ratio (F) Pure Sum (S) Contribution, P(%) Milling speed 2 2.39 1.19 144.89 2.37 72.82 Milling time 2 0.04 0.02 2.50 0.02 0.76 BPWR 2 0.66 0.33 40.21 0.65 19.84 Other error 20 0.16 0.01 6.58 Total 26 3.26 100% It was established that pooling of insignificant factors (time of milling) from the consideration (28) does not change the ANOVA results.
Leyendecker, On structure and properties of sputtered Ti and Al based hard compound films, J.
The HEBM is a complex process that involves many variables, such as ball to powder ratio, milling speed, ball size, milling time, starting powder size, mechanical properties of the initial powders, milling atmosphere, etc.
It was established that all factors, except the ball to powder weight ratio, are significant.
ANOVA table Factor DOF (f) Sum of Squares (S) Variance (V) F-Ratio (F) Pure Sum (S) Contribution, P(%) Milling speed 2 2.39 1.19 144.89 2.37 72.82 Milling time 2 0.04 0.02 2.50 0.02 0.76 BPWR 2 0.66 0.33 40.21 0.65 19.84 Other error 20 0.16 0.01 6.58 Total 26 3.26 100% It was established that pooling of insignificant factors (time of milling) from the consideration (28) does not change the ANOVA results.
Leyendecker, On structure and properties of sputtered Ti and Al based hard compound films, J.
Online since: May 2020
Authors: S.M. Aksenova, P.P. Deryabin, M.A. Raschupkina, Yu.S. Danilina
Aware of this drawback, there is a tendency to improve and to change the structure and technology of modern concrete production with obtaining better physical and mechanical properties of a new building materials generation.
The physical-mechanical properties of a new high-efficiency thermal insulation material – foam glass concrete are presented.
The tests have shown that the introduction of porous aggregate (granulated foam glass) into the foam concrete mixture allows to improve the physical mechanical (Table 1) and heat-insulating properties of concrete.
Thus, the physical mechanical properties of the materials in question depend on the following parameters: the volumetric component content, the strength and elastic properties of the components, and the adhesive binder strength with the aggregate.
The powdered ash properties, used as a fine aggregate, have a significant impact on the lightweight concrete properties formation.
The physical-mechanical properties of a new high-efficiency thermal insulation material – foam glass concrete are presented.
The tests have shown that the introduction of porous aggregate (granulated foam glass) into the foam concrete mixture allows to improve the physical mechanical (Table 1) and heat-insulating properties of concrete.
Thus, the physical mechanical properties of the materials in question depend on the following parameters: the volumetric component content, the strength and elastic properties of the components, and the adhesive binder strength with the aggregate.
The powdered ash properties, used as a fine aggregate, have a significant impact on the lightweight concrete properties formation.
Online since: September 2016
Authors: Ying Fang Fan, Shi Yi Zhang, Surendra P. Shah
To protect concrete from freeze/thaw damage, a number of research results about the factors affecting the material performance during freeze-thaw are reported.
Nano-particles possess excellent physical and chemical properties.
Multiple studies have shown that even small dosages of NKC can improve the physical and mechanical properties [3,4], and microstructure [5,6] of cement-based materials.
Physical, mechanical properties were conducted on the concrete with NKC particles compared to the control samples during the freeze/thaw cycles.
Ramyar, Freeze-thaw resistance, mechanical and transport properties of self-consolidating concrete incorporating coarse recycled concrete aggregate, Materials and Design. 53 (2014) 983-991
Nano-particles possess excellent physical and chemical properties.
Multiple studies have shown that even small dosages of NKC can improve the physical and mechanical properties [3,4], and microstructure [5,6] of cement-based materials.
Physical, mechanical properties were conducted on the concrete with NKC particles compared to the control samples during the freeze/thaw cycles.
Ramyar, Freeze-thaw resistance, mechanical and transport properties of self-consolidating concrete incorporating coarse recycled concrete aggregate, Materials and Design. 53 (2014) 983-991
Online since: October 2012
Authors: Jun Mu, Feng Mei Wang, De Rong Zhang
The properties including density, foam distribution and static compressive properties of this material were analyzed.
The major influence factors on the properties of hemp haulm foam material were the particle size, foaming agent and adhesives, etc.
Results and discussion Influence factors of the material cushioning property.
Fiber powders size showed to affect the cushioning properties with the influence of the internal link status.
The influence factors of the material cushioning property were particle size, starch content, foaming agent dosage, filler dosage, etc.
The major influence factors on the properties of hemp haulm foam material were the particle size, foaming agent and adhesives, etc.
Results and discussion Influence factors of the material cushioning property.
Fiber powders size showed to affect the cushioning properties with the influence of the internal link status.
The influence factors of the material cushioning property were particle size, starch content, foaming agent dosage, filler dosage, etc.
Online since: February 2012
Authors: Jing Zhu, Guo Ping Tang, Jun Rong Yu, Lei Chen, Zu Ming Hu, Ling Ling Zhu
To characterize the permeation property, the testing of water flux was carried out andit was found thatwith the increase of thickness, concentration and molecular weight, a decrease in water flux occurred.Moreover,the pore structureinvestigated by Field emission scanning electron microscopy (FESEM)wasconsistent withthe above phenomena.It is known that the pore size is affected by two factors: crystallization rate and the diffusion rate of diluent.
In addition, the cloud points, crystallization temperature under different conditions were obtained thus to provide important information to prepare microporous membrane with better mechanical properties for appropriate application.
Permeation property Pure water permeation measurement was carried out to characterize the permeation properties of various UHMWPE membranes and the results were showed in the Fig.2a) and b).
Determination of influence factors It was known that the pore size was affected by two factors: crystallization rate as well as the diffusion rate of diluent and that slower crystallization rate, faster diffusion rate would lead to larger pore size [11,12].
In addition, the cloud points, crystallization temperature under different conditions were obtained thus to provide important information to prepare microporous membrane with better mechanical properties for appropriate application.
Permeation property Pure water permeation measurement was carried out to characterize the permeation properties of various UHMWPE membranes and the results were showed in the Fig.2a) and b).
Determination of influence factors It was known that the pore size was affected by two factors: crystallization rate as well as the diffusion rate of diluent and that slower crystallization rate, faster diffusion rate would lead to larger pore size [11,12].
Online since: October 2014
Authors: Traian Grămescu, Constantin Cărăușu
The research allowed establishing the factors able to have a major influence on tool wear phenomenon and obtaining thus a more complete image concerning the machinability of grey iron used for castings.
From the point of view of machinability criteria listed above, on can conclude that an increase in value which gives some high physical and mechanical properties of cast iron is accompanied by a decrease of machinability by classical cutting methods.
In this way, each test sample had approximately constant mechanical characteristics.
Chemical compositions and physical-mechanical properties of test samples used for cast iron machinability evaluation Sample P1 P2 P3 P4 P5 P6 P7 C 3.2...3.4 3.1...3.3 3.0...3.2 3.3...3.4 3.4...3.5 3.2...3.3 2.25 Si 1.7...1.9 1.2...1.3 1.6...1.8 2.0...2.17 2.5...2.6 2.1...2.4 1.4 Mn 0.5...0.6 0.4...0.5 0.7...0.9 0.7...0.9 0.5...0.55 0.5...0.6 0.8...1.0 S 0.05...0.06 0.07...0.09 0.04...0.06 0.05...0.06 0.07...0.1 0.05...0.06 0.02...0.06 P 0.16...0.18 0.06...0.1 0.1...0.12 0.05...0.1 0.08...0.1 0.09...0.1 0.1...0.12 Cu 0.1...0.4 - - - - - - Cr 0.3...0.5 - 0.9...1.0 - - - 12.2 Ni - - 3.0...3.15 - - - - Mo - - 0.4...0.5 - - - 0.5...0.6 V - - 0.1 - - - 0.2...0.4 R [N/mm2] 195 256 325 470 630 200 347 δ % - - - 8 5 - - HB [N/mm2] 105...125 171...178 275...280 164...166 180...189 134...152 347...371 Table 2.
Pearlitic predominant structures, characterized by higher hardness in comparison with the ferritic structures, determined a more intense tool wear, negatively affecting the tool life.
From the point of view of machinability criteria listed above, on can conclude that an increase in value which gives some high physical and mechanical properties of cast iron is accompanied by a decrease of machinability by classical cutting methods.
In this way, each test sample had approximately constant mechanical characteristics.
Chemical compositions and physical-mechanical properties of test samples used for cast iron machinability evaluation Sample P1 P2 P3 P4 P5 P6 P7 C 3.2...3.4 3.1...3.3 3.0...3.2 3.3...3.4 3.4...3.5 3.2...3.3 2.25 Si 1.7...1.9 1.2...1.3 1.6...1.8 2.0...2.17 2.5...2.6 2.1...2.4 1.4 Mn 0.5...0.6 0.4...0.5 0.7...0.9 0.7...0.9 0.5...0.55 0.5...0.6 0.8...1.0 S 0.05...0.06 0.07...0.09 0.04...0.06 0.05...0.06 0.07...0.1 0.05...0.06 0.02...0.06 P 0.16...0.18 0.06...0.1 0.1...0.12 0.05...0.1 0.08...0.1 0.09...0.1 0.1...0.12 Cu 0.1...0.4 - - - - - - Cr 0.3...0.5 - 0.9...1.0 - - - 12.2 Ni - - 3.0...3.15 - - - - Mo - - 0.4...0.5 - - - 0.5...0.6 V - - 0.1 - - - 0.2...0.4 R [N/mm2] 195 256 325 470 630 200 347 δ % - - - 8 5 - - HB [N/mm2] 105...125 171...178 275...280 164...166 180...189 134...152 347...371 Table 2.
Pearlitic predominant structures, characterized by higher hardness in comparison with the ferritic structures, determined a more intense tool wear, negatively affecting the tool life.