New Technology of Solospun and Prospect of its Application and Development

2010 ◽  
Vol 136 ◽  
pp. 312-315
Author(s):  
Bo Zhao
Keyword(s):  
New Technology ◽  
High Strength ◽  
Single Strand ◽  
High Count ◽  
Product Technology ◽  
Better Than

In the paper the new technology of solospun and its principle of spinning are introduced. The yarn produced in this method is better than the normal yarn with the same count. This kind of yarn has the high strength and the characteristics of high resistant to abrasion and less hairiness etc. It can improve the efficiency of single strand to weave as well as provide the advantageous conditions for developing high count, light and thin product. Technology of solospun has wide prospect for development and application.

The Microstructure and Formability Study on DP Steel of Lightweight Automobile

2011 ◽  
Vol 704-705 ◽  
pp. 1465-1472
Author(s):  
Jin Wu ◽  
Da Sen Bi ◽  
Liang Chu ◽  
Jian Zhang ◽  
Yun Tao Li
Keyword(s):  
Mechanical Property ◽  
Work Hardening ◽  
High Strength Steel ◽  
High Strength ◽  
Mathematic Model ◽  
Theoretical Research ◽  
Forming Limit ◽  
Strain Hardening Exponent ◽  
Dp Steel ◽  
Better Than

Dual phase (DP) steel is a high strength steel for auto-panel. In this paper, mechanical property, forming ability, baked-hardening and work hardening properties of high strength steel DP450 are studied by experiments, and compared with those of steel MS6000.And theoretical research on predicting the forming limit of steel DP450 by the NADDRG model. The established mathematic model for relativity is of practical usefulness. Experimental results reveal that the yield strength of steel DP450 is about 7.2% lower than the MS6000,and the break strength increases by 18.9%,while the elongation increases by 19%.The strain hardening exponent of steel DP450 are superior to those of MS6000.The results show that mechanical property of high strength steel DP450 is better than that of MS6000,while forming ability of DP450 is not lower than that of MS6000.And baked-hardening and work hardening properties of steel DP450 are better than those of MS6000.The steel sheet DP450 owned a good forming ability.

Application of Inorganic Cohesive Glue in Concrete Repair

2010 ◽  
Vol 168-170 ◽  
pp. 945-948
Author(s):  
Shu Hua Liu
Keyword(s):  
High Strength Concrete ◽  
Mechanical Performance ◽  
High Strength ◽  
Concrete Repair ◽  
Repair Work ◽  
Strength Concrete ◽  
Original Specimen ◽  
Better Than

The properties of inorganic cohesive glue and its appliance to repairing ordinary and high strength concrete were studied in this paper. Inorganic cohesive glue not only has high strength, but also has equivalent coefficient of expansion with that of concrete and steel. The mechanical performance of inorganic cohesive glue is better than that of concrete, and other performances are similar to those of concrete. In the concrete repair work, it can mend the ruinate concrete well, and the strength of the repaired concrete is as high as or higher than that of original specimen.

Formability Analysis of Fukui Stretch-Drawing and Square Cup Drawing Using Strain and Stress Based Forming Limit Curves

2017 ◽  
Vol 751 ◽  
pp. 167-172 ◽  
Author(s):  
Sansot Panich ◽  
Nopparat Seemuang ◽  
Taratip Chaimongkon
Keyword(s):  
Flow Behavior ◽  
High Strength ◽  
Forming Limit ◽  
Forming Limit Curve ◽  
Yield Criteria ◽  
Hardening Law ◽  
Stress Curve ◽  
Strain Paths ◽  
Cup Drawing ◽  
Better Than

In this work, the experimental and numerical analyses of Forming Limit Curve (FLC) and Forming Limit Stress Curve (FLSC) for Advanced High Strength Steel (AHSS) sheet, grade JAC780Y, are performed. Initially, the FLC is experimentally determined by means of the Nakazima Stretch forming test. Subsequently, the FLSC of investigated steel was plastically calculated using the experimental FLC data. Different yield criteria including Hill48, and Yld89, are applied to describe plastic flow behavior of the AHS steel and Swift hardening law is taken into account. Hereby, influences of the constitutive yield models on the numerically determined FLSCs are evaluated regarding to those results from the experimental data. The obtained stress based forming limits are affected significantly by the yield criteria. Finally, the experimental and numerical formability analyses of Fukui stretch-drawing and square cup drawing tests are studied through FLC and FLSCs. It is observed that all stress based curves can be used very well to describe material formability of the examined steel compared to the strain based FLC. The strain based FLC depend on forming history and strain paths change. In the other hand, the stress based FLC do not depend on these issue. In this study, it can be concluded that the FLSCs could predict failure more realistically and better than the strain based FLC.

The Experimental Study on Grinding Properties of Gas Quenching Steel Slag

2011 ◽  
Vol 189-193 ◽  
pp. 612-617
Author(s):  
Hong Wei Xing ◽  
Yue Long ◽  
Xiu Li ◽  
Gao Liang Li ◽  
Yu Zhu Zhang ◽  
...  
Keyword(s):  
Specific Surface ◽  
New Technology ◽  
Steel Slag ◽  
Economic Benefits ◽  
Surface Areas ◽  
Mineral Phases ◽  
Quenching Process ◽  
Gas Quenching ◽  
Specific Surface Areas ◽  
Better Than

A gas quenching process to deal with steel slag and its characteristics of the new technology was briefly introduced. The grinding characteristics, mineral phases of gas quenching steel slag and the potential economic benefits of using it as cement mixing material was studied by compared to heat-stew steel slag. The results indicated that the specific surface areas (S) and grinding times (t) of the gas quenching steel slag showed a first order exponential decay relationship. With the extension of time, the specific surface areas of heat-stew steel slag was tending to balance earlier than that of gas quenching steel slag; The energy consumption of gas quenching steel slag was much lower than that of heat-stew steel slag. Gas quenching steel slag was comprised of C2S, C3S, a certain amount of (Ca2(Al, Fe)2O5）and RO phase, but the content of RO phase was relatively low, which increased the grindability of the quenching steel slag, so that the grindability of gas quenching steel slag was much better than that of heat-stew steel slag. Gas quenching steel slag prepared for cement addictives would bring great economic benefits.

scholarly journals Perbaikan Struktur Bangunan Pasca Gempa dengan menggunakan Serat Karbon (Studi Kasus Gedung Kantor Bea dan Cukai Teluk Bayur Padang)

2016 ◽  
Vol 11 (2) ◽  
pp. 32
Author(s):  
Elvi Roza Syofyan
Keyword(s):  
West Coast ◽  
Carbon Material ◽  
New Technology ◽  
Office Building ◽  
Strong Intensity ◽  
Richter Scale ◽  
Sumatra Island ◽  
Better Than

In the last ten years, the area west coast of Sumatra island has several times experienced the earthquake with strong intensity. Starting from the earthquake in Aceh December 26, 2004 until 30 September 2009 earthquake Pariaman ago. The last earthquake measuring 7.9 on the Richter scale has killed more than 1,000 people and damaged buildings 279 432, with 50 percent of them were severely damaged. Another alternative that is better than doing demolition is to retrofit. In general, the retrofit can be described as the addition of new technology or new technology on a merger between the old system (which already exists). In other words, the retrofit is the process of retrofitting old buildings with the aim of making these buildings resistant to earthquakes. From the calculation and analysis conducted on the carbon material, the material Sika Wrap Hex 230C can be used to retrofit House Office Building Customs Bayur Gulf of Padang. The method of implementation should be properly cared for, so that the strength of the building is expected back as they are resistant to earthquakes. It should be noted once in choosing the method of retrofitting that we will use.

scholarly journals Digital Workflow for Homemade Aligner

2021 ◽  
Author(s):  
Dalal Elmoutawakkil ◽  
Nabil Hacib
Keyword(s):  
New Technology ◽  
Digital Technologies ◽  
High Strength ◽  
High Quality ◽  
Digital Devices ◽  
The World ◽  
3D Printers ◽  
Dental Profession ◽  
Dental Offices ◽  
Clear Aligner

Advanced digital technology is rapidly changing the world, as well as transforming the dental profession. The adoption of digital technologies in dental offices allied with efficient processes and accurate high-strength materials are replacing conventional aligners workflows to improve overall patients’ experiences and outcomes. Various digital devices such as 3D printers, intraoral and face scanners, cone-beam computed tomography (CBCT), software for computer 3D ortho setup, and 3D printing provide new potential alternatives to replace the traditional outsourced workflow for aligners. With this new technology, the entire process for bringing clear aligner production in-office can significantly reduce laboratory bills and increase patient case acceptance to provide high-quality and customized aligner therapy.

In-Field Application of Steel Strip Reinforcement for Pipeline External Rehabilitation

2010 ◽  
Author(s):  
Nicholas J. Venero ◽  
Tim J. M. Bond ◽  
Raymond N. Burke ◽  
David J. Miles
Keyword(s):  
Steel Strip ◽  
New Technology ◽  
High Strength ◽  
Field Application ◽  
Operating Conditions ◽  
Operating Pressure ◽  
Precise Control ◽  
Ultra High Strength Steel ◽  
Structural Adhesive ◽  
Pipeline Design

A new technology for external rehabilitation of pipelines, known as XHab™, has been developed. This method involves wrapping multiple layers of ultra-high strength steel (UHSS) strip in a helical form continuously over an extended length of pipeline using a dedicated forming and wrapping machine. The reinforcement afforded by the strip can be used to bring a defective section of pipe (e.g. externally corroded or dented) back to its original allowable operating conditions, or even to increase the allowable operating pressure if the desired operating conditions exceed the original pipeline design limits. This paper describes the design, manufacture and testing process for a self-propelled wrapping machine for in-field rehabilitation. The wrapping apparatus consists of several major components including an opening sufficiently wide to receive the pipe, a movement assembly, a winding head, a preforming device, an accumulator and an oscillating adhesive applicator. The wrapping apparatus uses the winding head to wrap the reinforcing steel strip around the pipe. The movement assembly uses a pair of tracks in contact with the pipe to drive the wrapping apparatus along which enables helical wrapping of the reinforcing strip material. The oscillating adhesive assembly applies structural adhesive to the pipe immediately before the strip is wound. The winding head, motive assembly and adhesive applicator are electronically synchronized to one another to enable precise control of pitch and adhesive volume. The paper also describes the field application of XHab including mobilization/demobilization of equipment and interaction with other rehabilitation equipment, as well as specific aspects such as initiation and termination of wrapping, protection of rehabilitated area and implementation of cathodic protection.

Comparative Reliability Analysis of FAST-Pipe™ and All-Steel Pipe

2010 ◽  
Author(s):  
Qishi Chen ◽  
Mamdouh M. Salama
Keyword(s):  
New Technology ◽  
High Strength ◽  
Steel Grade ◽  
Steel Pipe ◽  
Conventional Steel ◽  
Reliability Level ◽  
Design Basis ◽  
Steel Technology ◽  
Ongoing Work ◽  
Steel Design

Fiber Augmented Steel Technology Pipe (FAST-Pipe™) is being proposed as an alternative to high strength steel (grade X80 or higher) for high pressure gas transmission pipelines. The FAST-Pipe™ is manufactured by wrapping dry fiberglass on conventional steel pipe. It offers many performance and cost advantages. However, as with any proposed new technology, it is required to achieve a reliability level at least equal to the conventional all-steel technology. This paper summarizes the results of a burst failure probability analysis. It was part of the ongoing work to experimentally and analytically establish the design basis for FAST-Pipe™. The purpose of this study is to estimate the burst failure probabilities of defect-free all-steel and FAST pipes after 30 years of operation, and to identify FAST-Pipe™ design cases which can achieve burst reliability levels comparable to those of an all-steel design. The results of this study suggest that a safety factor of 2.0 on burst pressure is adequate for the FAST-Pipe™.

Study on the Effect of Different Joints Material on GRP Jacking Pipe

2011 ◽  
Vol 117-119 ◽  
pp. 995-998
Author(s):  
Jian Zhong Chen ◽  
Zhuo Qiu Li
Keyword(s):  
Deflection Angle ◽  
High Strength ◽  
Compression Stress ◽  
Reinforced Plastics ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Plastics ◽  
Long Life ◽  
The Deflection Angle ◽  
Jacking Force ◽  
Better Than

GRP (Glass fiber reinforced plastics) jacking pipe has many advantages, such as lightweight, high strength, corrosion resistance, long life, good hydraulic and so on. The key of GRP jacking pipe is the joints problem. There are two different joints material in GRP jacking pipe: GRP ring and steel ring. The effect of different joints material on the GRP jacking pipe is analyzed by ABAQUS. When the jacking pipe with jacking force, the deflection angle of the pipeline has significant effect on joints force, even if the 0.05° of deflection, the pipe axial compression stress will double. When the jacking pipe without jacking force, joints force related to free deflection angle of the joints. Through comparison the steel ring and GRP ring shows that GRP ring better than steel ring on the ability to withstand deflection.

Interface debonding performance of precast segmental nano-materials based concrete (PSNBC) beams

2020 ◽  
Vol 10 (8) ◽  
pp. 1317-1327 ◽  
Author(s):  
Xinfeng Yin ◽  
Ming Zhang ◽  
Lei Wang ◽  
Yang Liu
Keyword(s):  
Lead Zirconate Titanate ◽  
High Strength ◽  
Concrete Specimen ◽  
Lead Zirconate ◽  
Epoxy Adhesive ◽  
Interface Debonding ◽  
Nano Materials ◽  
Monitoring Test ◽  
Physical Effects ◽  
Better Than

The precast segmental concrete (PSC) structures and the nano-materials based concrete beams are widely applied to civil engineering. On the other hand, it is well known that nano-materials have physical effects and can significantly improve the concrete properties of cement-based materials. Therefore, the interface debonding performance of precast segmental nano-materials based concrete (PSNBC) beams is investigated in this study. Two concrete specimens with nano-materials and one concrete specimen without nano-materials were prepared and bonded into PSC beams with a high strength epoxy adhesive. The smart aggregates (SAs) made of piezoceramic Lead Zirconate Titanate (PZT) and concrete are used as the intelligent transducer of monitoring test specimen. The PSC beam was loaded periodically by screw jack to simulate the random debonding damage of different degrees. The experimental results show that the interface debonding performance of the concrete specimens with nano-materials is significantly enhanced and better than that of concrete specimens without nano-materials.

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