Analysis on the turning point of dynamic in-plane compressive strength for a plain weave composite

Experimental investigations on dynamic in-plane compressive behavior of a plain weave composite were performed using the split Hopkinson pressure bar. A quantitative criterion for calculating the constant strain rate of composites was established. Then the upper limit of strain rate, restricted by stress equilibrium and constant loading rate, was rationally estimated and confirmed by tests. Within the achievable range of 0.001/s-895/s, it was found that the strength increased first and subsequently decreased as the strain rate increased. This feature was also reflected by the turning point(579/s) of the bilinear model for strength prediction. The transition in failure mechanism, from local opening damage to completely splitting destruction, was mainly responsible for such strain rate effects. And three major failure modes were summarized under microscopic observations: fiber fracture, inter-fiber fracture, and interface delamination. Finally, by introducing a nonlinear damage variable, a simplified ZWT model was developed to characterize the dynamic mechanical response. Excellent agreement was shown between the experimental and simulated results.

不同编织方式下陶瓷基复合材料表面流动特性数值计算研究

Ceramic matrix composites(CMCs) are one of the most promising materials in the field of gas turbines,with superior weight and thermal properties. Its surface morphology is different from the traditional casting airfoil components, which mainly comes from different weaving methods and different braided tow thickness. However, few people have studied the influence of surface morphology of ceramic matrix composites(CMCs) on the development of boundary layer and the resulting flow loss. In this paper, Tex Gen is used to generate different surface morphology structures of ceramic matrix composites(CMCs), and the surface flow characteristics of corresponding CMCs plates are numerically studied. It is found that the slope of the displacement thickness of the woven surface first increases and then decreases in the whole transition interval. Thicker braided tow thickness and denser braiding method will induce earlier flow transition phenomenon and produce greater flow loss;The flow loss on the surface of CMCs plate is mainly composed of the vortex loss in the pit and the boundary layer loss outside the pit, and the boundary layer loss is dominant. The weaving methods has a greater influence on the flow state and flow loss of the boundary layer.

Improvement of Weld Quality Using a Weaving Beam in Laser Welding

This paper describes a way to improve the weld quality through suppressing the porosity formation and restraining the growth of columnar grains by using a weaving beam in laser welding. The experimental results show that the N2 porosity of beam-weaving laser welding low carbon steel can be remarkably reduced with increasing weaving frequency, and porosity can be eliminated when the weaving amplitude is only 0.5 mm; and the Ar porosity in the weld metal is decreased with increasing weaving frequency and amplitude when the welding speed is higher than 0.5 m/min. The beam-weaving laser welding of ultra-fine grained steel has been investigated. The experimental results show that beam-weaving laser welding with appropriate amplitude and frequency can partly restrain the growth of the columnar grain and improve the tensile strength of the weld metal.

Parametric Design Used in the Creation of 3D Models with Weaving Characteristics

The art of weaving is an ancient and beautiful technique that never fades. Various weaving techniques and various totem patterns contain rich cultural connotations. The development of cultural and creative industries often uses existing environmental materials to deconstruct and use them in innovative ways to reinspire and present another style. With the rapid progress of computer-aided design technology, digital applications in the design practice has become an important element, and parametric design is the best popular design method in recent years. This paper is mainly in view of the weaving crafts in the traditional culture of the world occupies an important role, and the precious traditional weaving crafts gradually lost. Therefore, it is planned to construct a 3D model with knitting characteristics through a parametric design method, and print out the prototype through the 3D printing mechanism, that is, the traditional craftsmanship is integrated into the modern manufacturing process with innovative techniques, to show the new style of this weaving craft culture that is different from the past, so that it not only retain its inherent spirit, but also can promote this ideal of cultural creativity.

AN ANALYSIS OF DYNAMIC PERFORMANCE OF BACK REST OF WEAVING MACHINERG

Periodic variations of warp tension during a weaving cycle results in corresponding variationsof back rest position.However,the oscillation of back rest,in turn,shows effect on the variation ofdynamic warp tension.As a force transfer medium,warp yarn,with specific dynamic performances,is certainly one of the factors influencing the movement of back rest.In this paper,warp yarn istreated as a viscoelastic medium in studying the dynamic behaviours of back rest.A mathematicalmodel of a back rest system is developed based on the automatic control theory.Several factors arelisted,which show influences on the performances of the back rest system.Analytical work is car-ried out to identify the effects on the frequency response of the back rest systen resulting from vari-ations of such parameters as the modulus of elasticity,of both fast-elastic and slow-elasticdeformations,and viscosity coefficient.

A STUDY ON THE RAW MATERIAL, STRUCTURE AND WEAVING INSTRUMENTS OF FABRICS BEFORE THE WEST ZHOU DYNASTY

In this paper, based on literature of relics of typical fabrics before the West Zhou unearthed in China till now, the weaving technology, including the raw material, the fabic structure, and the weaving instruments of that period was synthetically studied. The wooden loom parts unearthed in the Hemudu ruin, Zhejiang Prov. were studied with reference to the inscriptions on bones and tortoise shells as well as the characters casted on bronze objects, denoting the weaving instruments of pre-Zhou pcriod. The results show that, all the main natural fibres were utilized, all simple and combined weaves except the satin weave had appeared, and the weaving instruments might include the ground loom with 3 or 4 points support, besides the breast loom already reported.

G-G PATTERNING METHOD OF SILK WEAVING IN EARLIER CHINA

There are some unique techniques in the Chinese traditional silk production. 2-2 patterning method is such one suggested by foreign scholars. But this paper gives a more extensive concept, G-G method, which includes the 2-2 method after studying more fabrics from the Shang. to the Five Dynasties. Finally, the paper discusses the truth of G-G method the (?) applied in, and some characteristics of G-G method.

ICARE Model:Learning Model Organization That Based on Work Skills Through Saori Weaving for Special Needs Children

Purpose:(1)Study the current state and needs of learning management,focusing on work skills through Saori weaving for special needs children;(2)Develop a learning management model focusing on work skills;(3)Develop a teacher-centered learning management approach through the use of Saori weaving for special needs children;(4)Study the effectiveness of the learning management model that focuses on working with special children.Research&Development Research Results:(1)The current state and needs of learning management focused on work skills through Saori weaving for special children;(2)The learning management model emphasizing for special children is four steps:a.prepare the actual context;b.set goals;c.plan and execute;d.monitoring;and Evaluatio Saori Weaving Class has five details:(1)Inspire:I(Explain:Inspired to work for success);(2)Choose:C(Explain:Choose what you like before you can see the future do it);(3)Aim&Act:A(Explain:Work with a happy goal that has set);(4)Reflect on learning:R(Explain:Reflect on learning);(5)Experiential-Based Learning Measure by concluding:ICARE Model.The results of teacher development on learning management focused on working skills:(1)Teachers with average scores after training,35.09%was 77.98%;(2)22 trainers were able to develop a skill management plan in the 21st century at the best evaluated in 73.33%and eight persons respectively in good or 26.67%.(3)The results of the study on the effectiveness of the model showed that the extra children had a higher grade of Saori weaving.After class,75.49%were higher than the standard set of 70%and the students were satisfied with Saori weaving as the most levels.

COMPUTER SIMULATION FOR THE-INFLUENCE OF WEFT-COMPRESSIBILITY ON WEAVING RESISTACE AND PICK-SLIPPING UNDER THE BALANCED-SHED

Based on the privious model,this paper discusses the effect of the compessed property of the weft on the weaving-resistance and picks slipping under unbalanced -shed.after giving a short description about the privious work.The discussion is made.under both situation of constant- cloth- tension and variable- cloth- tension respectively.

Jiangsu Dyed-yarn Weaving Group Holdings Co. Ltd

The high-quality seersucker series products, produced by the Jiangsu Dyed-Yarn Weaving Group Holdings Co. Ltd. are selling well on the international textiles market. The predecessor of the company was the Tongzhou City Shuangmeng Cloth Weaving Mill, a small factory run by the township. Its Flying Wing brand yarn-dyed seersucker enjoys a

Shanghai Cotton Spinning Weaving Dyeing & Printing United Corporation

The Shanghai Cotton Spinning Weaving Dveing and Printing United Corporation is an economic entity organized by 51 enterprises under three corporations controlled by the Shanghai Textile Bureau for the production of namebrand products as its mainstay, dyeing, printing and foreign trade. With 1.2 million ring spindles,

A Brief Analysis of the Migration of Silk Weaving Craftsmen and the Spread of Silk Weaving Techniques in the Ancient Bashu Area along the Southern Silk Road

During ancient times,silk weaving techniques already matured in the Bashu area and“Shu Satin”silk products were widely known.Shu Satin not only performed as a high-quality commodity in the Northern Silk Road trade activities,but also conveyed cultural and social significance.Credit for the importance of Shu Satin must go to the extraordinary weavers in the Bashu area.The migration and circulation of these weavers spread the exquisite brocade and sericulture techniques throughout and beyond the Bashu area,and accelerated brocade and sericulture techniques in ancient southern China,Myanmar,and Vietnam.Accordingly,the Southern Silk Road can be seen as a path to disseminate the silk weaving techniques that originated in the Bashu area.This paper takes the migration of Shu Satin as its mainline and discusses how the weaving craftsmen spread the brocade and sericulture techniques throughout southern China during their travels and migrations,and the immeasurable contributions these craftsmen made to economic and trade activities along the ancient Southern Silk Road.This paper explores the technical accumulation and dissemination of brocade craftsmen in the Bashu area from three perspectives.The first perspective is the accumulation period of the ancient silk weaving techniques-the inflow of craftsmen from central China and the development and integration of the sericulture and silk weaving techniques in the Bashu area.The second is the technique dissemination period,centered on the silk weaving craftsmen in the Chengdu region of the Bashu area.The third is the techniques’outmigration period and the migration and circulation of craftsmen throughout the Bashu area.This paper strives to outline the dynamic lines that the Bashu silk weaving craftsmen created and the spread of their exquisite weaving techniques during their migration and circulation.This will illustrate that the ancient Southern Silk Road was not only a trade and cultural exchange zone for ancient silk commodities,but more importantly,it was a dynamic space for the dissemination and development of brocade weaving techniques.

Ten-Year Hardworking Gives Birth to "Champion Title" ——Shengzhou Qiandai Necktie & Weaving Co., Ltd

At the end of 1990s, Shengzhou necktie industry was in a dismal state at the moment and the 28-year-old Mi Jiandong ran counterride and set up a necktie company on the rent workshop with floor area of 1,000m2 in the former Dongpu Village and the daily output of necktie reached 3,000 per day.

Research on Blended Teaching Mode of Weaving Course

Through the reform of informatization teaching mode,the blended teaching mode combining“online teaching”learning and“offline teaching”in classroom teaching is very important for the construction of weaving science.Blended teaching mode gives full play to the classroom teaching function of the online network teaching platform,while increasing the learning function of offline students,and also provides a platform for offline teacher-student exchanges.Continuously improving the integration of the network teaching platform and the blended teaching system will be of great significance to the theoretical study of the weaving course,professional construction and the training of textile engineering professionals.It has important promotion value in the construction of weaving courses and the construction of other textile engineering courses.

ITEMA WEAVING:Ecological Solutions and a New Rapier Weaving Machine at ITMA ASIA

ITEMA Weaving with its brands Sulzer Textil,Somet and Vamatex, will present its latest technical innovations on weaving machinery at ITMA ASIA+CITME in Shanghai,22-26 June.Among the widest range of weaving machines,accessories and services,ITEMA Weaving will exhibit the Vamatex R880 rapier weaving machine for the very first time ever to public.

Perfect Solutions for Weaving Preparation in india

Presentation of KARL MAYER’s reorganised warp preparation business unit during a series of symposia held in India on the 19,21 and 23 January. KARL MAYER’s Warp Preparation Section continues to focus on providing an excellent customer service,and has recently been reorganised to make it even more efficient.Its operations were presented during

The economic operation of the filament weaving industry in the first three quarters in 2017

Since 2017,the global economic recovery has increased tendency.The economic growth of main countries and districts has promoted.The Chinese economy welcomes the successful commencement of the 19th National Congress in transforming from high-speed growing economy into high-quality development.With the promotion of new era and new dynamic power,the Chinese economy steps into the new development stage and the textile industry has

The Biggest Weaving Machines Order from North Italy

The ITEMA Group, the world leader in textile machinery has signed the biggest supply of 1,500 weaving machines in the Chinese market on the 11th May, 2006.

Produced-water treatment: Application and research of combined fiber coalescence technique in offshore oilfield

When the process of extraction of oil from an offshore oilfield enters the advanced stages,the water content in the extracted fluid can be above 90%.The water quality is complex with many types of pollutants and highly emulsified water.Therefore,a key consideration in the production process of offshore oilfields is the efficient and economical treatment of the oil-containing produced water to make it suitable for discharge and recover oil pollutants.In this study,we developed a hydrophilic and hydrophobic combined fiber coalescence separator with composite fiber shapes using fiber induction and X/Uweaving.The separator is designed based on experimental observations of the mechanism of structure coalescence in the physical oil removal method.A pilot test was performed on an oil exploration platform in the Bohai Sea.At the designed flow rate,the separator reduced the total concentration of petroleum in the produced water from 2000 to 3000 mg/L to below 60 mg/L,with an average oil removal efficiency of 98.24%.Furthermore,it effectively reduced the number of organic compounds present in the water from 120 to 17 and removed 70% of the SS.The test results show that the proposed device can be used fr produced-water treatment on offshore platforms.

Coordinate-Parametric Matrix Model Inspired Square-Conjoint Pattern in Cross Woven for Conventional Bamboo Mat

In the study,it is proposed that a coordinate-parametric matrix model is performed to a square-conjoint pattern of cross woven(SCPCW)in the bamboo mat.The patterns of SCPCW are firstly detected according to the perspective of configuration,which is divided into the basic-monomer shape and the basic combination shape.Secondly,the compositions of design patterns in SCPCW are analyzed to attain the trend of curve shape.Based on the coordinate-parametric matrix model,the specimens of SCPCW are subsequently accomplished to elaborate the woven logic of bamboo mats.The digital innovation of SCPCW,defined by a mathematical resolution,is implemented by the software of Grasshopper(GH),which plays a crucial role in capturing image information by the Image Sampler component.Successively,the weaving logic of coordinated matrix is referred to apply in the computing component of Grasshopper software.Finally,the computer simulation could demonstrate that the coordinate-parametric matrix model of SCPCWwould be realized to analyze the micro-weaving structure and overall weaving effect in the bamboo mat.