The Fabrics Magnetic Coating Finishing Explore

2012 ◽  
Vol 627 ◽  
pp. 258-262
Author(s):  
Nan Ping Deng ◽  
Ru Quan Zhang
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Abrasion Resistance ◽  
Magnetic Particle ◽  
Breaking Strength ◽  
Experimental Results ◽  
Before And After ◽  
Magnetic Coating ◽  
Selection Of ◽  
Better Than

The topics chosen Fe3O4 and r-Fe2O3 nano-magnetic particle, respectively, with polyurethane and polyacrylate mixed ,mixed evenly coated on the surface of the fabric, then on before and after coating fabric tensile properties, tear resistance mechanical properties tested and compared. Experimental results show that: the choice of Fe3O4 better than r-Fe2O3 remanence effects, selection polyacrylate better softness than the selection of polyurethane, the latitude and longitude to the breaking strength was increased in the magnetic coating of the fabric, while the tear strength and abrasion resistance were reduced .

scholarly journals The effectiveness of integrating existing digital learning resources into classroom teaching – an evaluation of the learning achievement

2012 ◽  
Vol 8 (2) ◽  
pp. 150-161
Author(s):  
Svava Pétursdóttir
Keyword(s):  
Secondary Science ◽  
Learning Resources ◽  
Teacher Competence ◽  
Digital Learning ◽  
Science Classrooms ◽  
Before And After ◽  
Quasi Experimental ◽  
Digital Learning Resources ◽  
Selection Of ◽  
Better Than

This paper presents the results of an intervention study exploring the effectiveness of an implementation of a selection of digital learning resources (DLR) in lower secondary science classrooms. Eight teachers participated in a quasi-experimental intervention, teaching three different subjects with and without DLRs. The data presented are from pupil tests before and after the teaching combined with observation of lessons and interviews with both pupils and teachers. In two of the three subjects the groups using DLRs did slightly better than the comparison group. The results indicate that successful ICT based learning is just as dependent on teacher competence as the quality and features of the resources.

Textile Performance Properties of Cotton Fabric Treated with Selected Flame-Retarding Finishes

1977 ◽  
Vol 47 (5) ◽  
pp. 365-371 ◽  
Author(s):  
Stanley P. Rowland ◽  
John S. Mason
Keyword(s):  
Cotton Fabric ◽  
Abrasion Resistance ◽  
Breaking Strength ◽  
Superior Performance ◽  
Disodium Hydrogen Phosphate ◽  
Performance Properties ◽  
Different Types ◽  
The Individual ◽  
Medium Weight ◽  
Selection Of

Seven different types of flame-retarding finishes were applied to light-to-medium weight cotton fabric at add-ons appropriate to pass the DOC FF 3–71 test. The finishes studied were based on tetrakis(hydroxymethyl)phosphonium chloride (THPC), neutralized THPC (THPOH), Fyrol 76, and Pyrovatex CP. The specific finishes were: THPOH-NH3, THPOH-urea-trimethylolmelamine, Proban (THPC-urea precondensate)-NH3, THPC-urea-disodium hydrogen phosphate, Fyrol 76, Fyrol 76-N-methylolacrylamide, and Pyrovatex CP-methylolmelamine. Textile performance properties are reported as a function of add-on of each type of finish; strengths and abrasion resistance of the finished fabrics are considered and discussed as a function of resilience. General trends of decreasing strength and abrasion resistance with increasing resilience were observed for these flame-retardant fabrics. Within this trend there is latitude for selection of finishes that will provide superior performance in the individual textile property such as abrasion resistance, breaking strength, and tearing strength.

scholarly journals Influence of Interpass Temperature on Wire Arc Additive Manufacturing (WAAM) of Aluminium Alloy Components

2019 ◽  
Vol 269 ◽  
pp. 05001 ◽  
Author(s):  
Karan Derekar ◽  
Jonathan Lawrence ◽  
Geoff Melton ◽  
Adrian Addison ◽  
Xiang Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Tensile Properties ◽  
Deposition Pattern ◽  
Formed Product ◽  
Traditional Manufacturing ◽  
Wire Arc Additive Manufacturing ◽  
Interpass Temperature ◽  
Temperature Sample ◽  
Better Than

Wire arc additive manufacturing (WAAM) technique has revealed the potential of replacing existing aerospace industry parts manufactured by traditional manufacturing routes. The reduced mechanical properties compared to wrought products, the porosity formation, and solidification cracking are the prime constraints that are restricting wide-spread applications of WAAM products using aluminium alloys. An interpass temperature is less studied in robotic WAAM and is the vital aspect affecting the properties of a formed product. This paper highlights the effects of change in interpass temperature on porosity content and mechanical properties of WAAM parts prepared using DC pulsed GMAW process, with 5356 aluminium consumable wire. The samples prepared with different interpass temperatures were studied for the distribution of pores with the help of computed tomography radiography (CT radiography) technique. A WAAM sample produced with higher interpass temperature revealed 10.41% less porosity than the sample prepared with lower interpass temperature. The pores with size less than 0.15mm3 were contributing over 95% of the overall porosity content. Additionally, on a volumetric scale, small pores (<0.15mm3) in the higher interpass temperature sample contributed 81.47% of overall volume of pores whereas only 67.92% volume was occupied in lower interpass temperature sample with same sized pores. The different solidification rates believed to have influence on the hydrogen evolution mechanism. Tensile properties of higher interpass temperature sample were comparatively better than lower interpass temperature sample. For the deposition pattern used in this study, horizontal specimens were superior to vertical specimens in tensile properties.

The Mechanical Properties of PSA Fibers after Corrosion

2010 ◽  
Vol 146-147 ◽  
pp. 221-224
Author(s):  
Xin Yan Yuan ◽  
Heng Gen Shen ◽  
Zhen Hua Wang ◽  
Wei Li Hou
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Breaking Strength ◽  
Retention Rate ◽  
Acid Corrosion ◽  
Strong Acid ◽  
Elongation Rate ◽  
Scanning Electron ◽  
Better Than ◽  
Made In

In order to reveal the influence of acidic gas SO2 and CaO etc alkali substances which are contained in industrial furnaces smoke to the strength of PSA fiber, tests are made in different acid and alkali conditions, and the changes of its surface morphology were observed by scanning electron microscope (SEM). The results show that: PSA has better acid corrosion resistance than alkali corrosion resistance. Its acid corrosion resistance is similar to the domestic aramid. PSA is better than Nomex in the concentration of 5% H2SO4. Its alkali corrosion resistance is worse than domestic aramid. The retention rate of breaking strength drop to 60.80% and 69.52% respectively after treated in the concentration of 5% H2SO4 for 48 hours and in the concentration of 5% NaOH for 4 hours. The elongation rate decline to 68.14% and 40.22% respectively, and the elongation rate fell to 68.14% and 40.22% respectively. Therefore, the PSA must be dealt against corrosion when used in strong acid or alkali environment.

Mechanical Properties and Creep Behavior of Mg-Gd-Y-Zr Alloys

2007 ◽  
Vol 546-549 ◽  
pp. 163-166 ◽  
Author(s):  
Yan Gao ◽  
Qu Dong Wang ◽  
Jin Hai Gu ◽  
Yang Zhao ◽  
Yan Tong
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Creep Behavior ◽  
Creep Resistance ◽  
Different Temperatures ◽  
Cast Condition ◽  
Better Than ◽  
Zr Alloy ◽  
Zr Alloys

The microstructure, mechanical properties and creep behavior of Mg-Gd-Y-Zr alloys at different temperatures and stresses have been investigated. Results show that the tensile properties and creep resistance at T6 condition is much higher than that at as-cast condition. The creep resistance of Mg-Gd-Y-Zr alloy at 250°C/80MPa is markedly better than that at 300°C/50MPa, indicating that temperature makes more effects on the creep resistance than the stress.

scholarly journals The Effect of Cooling Rate on Mechanical Properties of Carbon Steel (St 35)

2014 ◽  
Vol 7 (1) ◽  
pp. 109-118
Author(s):  
Jenan Mohammed Nagie
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Grain Size ◽  
Carbon Steel ◽  
Cooling Rate ◽  
Experimental Results ◽  
Heat Treated ◽  
Before And After ◽  
Water Media ◽  
The Relationship

This paper is aimed to study the effect of cooling rate on mechanical properties of Steel 35. Specimens prepared to apply tensile, torsion, impact and hardness tests.Many prepared specimens heat treated at (850ºC) for one hour and subsequently were cooled by three different media [Water-Air-furnace] to show the effect of Medias cooling rate on mechanical properties. Microstructures of all specimens examined before and after heat treatment by an optical microscopy.To figure the phases obtained after heat treatment and its effect on the mechanical properties Experimental results have shown that the microstructure of steel can be changed and significantly improved by varying line cooling rate thus, improving one property will effect on the others because of the relationship between all properties.In water media tensile, torsion and hardness improved while impact results reduced. Air media contributed in improving most of the mechanical properties because of grain size homogeneity. At furnace media ductility and impact improved

Experimental Study on Behaviour of Rc T-Beam Strengthened with Jute Fiber Laminates - A Review

2019 ◽  
Vol 1 (6) ◽  
pp. 503-508
Author(s):  
Tharunkumar N ◽  
Anand G
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Tensile Properties ◽  
Natural Fiber ◽  
Low Cost ◽  
Shear Capacity ◽  
Experimental Results ◽  
Jute Fiber ◽  
Structural Behaviour ◽  
Synthetic Fibers

The present investigation addresses the external strengthening of reinforced concrete (RC) T-beams using jute fiber laminates. An experimental study is mainly carried out to study the change in structural behaviour of RC T-beams using externally wrapped jute fiber laminates, to enhance the shear and flexural capacity of the beams. The effect of pattern and orientation of the strengthening fabric on the shear capacity of the strengthened beams will be examined. RC T-beams with minimum shear reinforcement is designed and then external confinement using jute fiber laminates is carried out using epoxy resin. The layer confinement is executed to study and analyze the behaviour of confined beams with respect to control beam. Experimental results showing the advantage of beam strengthened using the various lay-ups of jute fiber are to be discussed. For all developed composites, experimental results revealed that the tensile properties of the developed composites are strongly dependent on the tensile strength of jute fiber and that the tensile properties of jute fiber are very much defect sensitive. Jute as a natural fiber is eco-friendly, low cost, versatile in textile fields and has moderate mechanical properties, which replaced several synthetic fibers in development of many composite materials. However, the hydrophilic nature of the jute fiber affects the mechanical properties of the developed composites. As a result to arrest crack and improve the strength of beam.

Effects of Different Species of Sr Additives on as Cast Microstructure and Tensile Properties of AS31 Alloy

2015 ◽  
Vol 816 ◽  
pp. 465-469
Author(s):  
Ji Xue Zhou ◽  
Jin Wei Wang ◽  
Yi Zhang ◽  
Shou Qiu Tang ◽  
Wei Hong Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Ambient Temperature ◽  
Tensile Properties ◽  
Experimental Results ◽  
Cast Microstructure

Effects of different species of Sr additives (pure Sr, cast Mg-10Sr block, Ф10mm extruded Al-10Sr bar) on as-cast microstructure and tensile properties both at ambient temperature and elevated temperature of AS31 alloy were studied. The experimental results showed that pure Sr, Mg-10Sr, Al-10Sr additions all could refine the grains of AS31 alloy obviously, modify the eutectic Mg2Si particles and strengthen AS31 alloy. Al-10Sr is most effective to refine microstructure and improve mechanical properties of AS31 alloy.

Effects of Atmospheric Conditions on the Mechanical Properties of Tires

2012 ◽  
Vol 232 ◽  
pp. 14-18 ◽  
Author(s):  
Zbigniew Olszewski ◽  
Konrad J. Waluś
Keyword(s):  
Mechanical Properties ◽  
Measuring Equipment ◽  
Weather Conditions ◽  
Road Surface ◽  
Experimental Results ◽  
Atmospheric Conditions ◽  
Operational Parameters ◽  
Proper Selection ◽  
Safe Driving ◽  
Selection Of

Safe driving requires from the driver several visual-mental activities (perception, Proper selection of the tires depending on the season allows for optimizing the level of risk associated with driving in varying weather conditions. Properties tires used in the vehicle operational parameters show variability of depending on temperature, leading consequently to change the characteristics of the traction of the vehicle. Understanding the nature of these relationships is essential to determine the nature interaction. tires and road surface This paper presents experimental results hardness of tires under normal traffic using a mobile measuring equipment.

Effect of Temperature on Tensile Properties of Vulcanized Rubber

1934 ◽  
Vol 7 (2) ◽  
pp. 371-386
Author(s):  
A. A. Somerville ◽  
W. F. Russell
Keyword(s):  
High Temperature ◽  
Tensile Properties ◽  
Room Temperature ◽  
Point Of View ◽  
Effect Of Temperature ◽  
Curing Conditions ◽  
Vulcanized Rubber ◽  
Before And After ◽  
Temperature Test ◽  
Better Than

Abstract The tensile properties and tear resistance of a large number of commercial inner tubes, before and after aging by different methods, are studied at 0°, 25°, and 100° C. A number of uncured bus-truck tube stocks are also studied from the point of view of their capacity to withstand high temperatures. The effect of testing rubber at 100° C. as compared with room temperature is discussed; how some compounds collapse at 100° C., while others have tensile properties equal to, or better than those at 25°, is shown. The effect of testing artificially aged specimens at 100° C., as well as at 25° C., is discussed; the high-temperature test may reveal conditions of deterioration and overcure that are not noticeable in the 25° tests. The compounding and curing conditions that lead to high tensile properties at 100° C., as well as those which cause inferior quality, are discussed.

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