Study on Relationship between Mechanical Properties and Seam Smoothness Worsted Fabric

2011 ◽  
Vol 175-176 ◽  
pp. 999-1004
Author(s):  
Hong Ni ◽  
Rui Fan
Keyword(s):  
Mechanical Properties ◽  
Air Temperature ◽  
Brand Development ◽  
Temperature And Humidity ◽  
Environmental Air ◽  
Fiber Materials ◽  
In Suit ◽  
The Relationship ◽  
Garment Seam

The instability of seam smoothness for worsted fabric is always a big problem in suit industry. With substantial development and application of new worsted fabric as well as the comprehensive application of various fiber materials，it is difficult to control seam smoothness of suit, creating the quality of suite to descend and adversely affecting the brand development in suit industry. The purpose of this paper is, therefore, intending to study the relationship between worsted fabric mechanical properties and garment seam smoothness grade as well as the effect of environmental air temperature and humidity conditions on smoothness of seam sample, by selecting several pieces of worsted fabrics and testing their mechanical properties through FAST. The goal of this paper is to facilitate textile and garment enterprises to improve their own textile process and finishing as well as the sewability of worsted fabrics.

scholarly journals The influence of precipitation origin on the δ18O–T relationship at Neumayer station, Ekstrmisen, Antarctica

2004 ◽  
Vol 39 ◽  
pp. 41-48 ◽  
Author(s):  
Elisabeth Schlosser ◽  
Carleen Reijmer ◽  
Hans Oerter ◽  
Wolfgang Graf
Keyword(s):  
Air Temperature ◽  
Open Water ◽  
Weddell Sea ◽  
Air Masses ◽  
Ice Coverage ◽  
Synoptic Weather ◽  
Time Period ◽  
The Relationship ◽  
Snow Samples

AbstractThe relationship between δ18O and air temperature at Neumayer station, Ekstrmisen, Antarctica, was investigated using fresh-snow samples from the time period 1981–2000. A trajectory model that calculated 5 day-backward trajectories was used to study the influence of different synoptic weather situations and thus of different moisture sources on this correlation. Generally a high correlation between air temperature and δ18O was found, but the quality of the δ18O–T relationship varied with the different trajectory classes. Additionally, the sea-ice coverage on the travel path of the moist air was considered. The amount of open ocean water underneath the trajectory has a large influence on the δ18O–T relationship. For trajectories that lead completely above open water, no significant correlation between δ18O and T was found, because mixing with air masses containing additionally evaporated water vapour from the ocean influences the isotope ratio of precipitation. A very high correlation, however, was found for transports over the completely ice-covered Weddell Sea.

The Relationship Between Microstructure and Mechanical Properties of Late 19th/Early 20th Century Wrought Iron Using the Generalized Method of Cells Model

2002 ◽  
Vol 712 ◽  
Author(s):  
Jennifer J. Hooper ◽  
Lori Graham ◽  
Tim Foecke ◽  
Timothy P. Weihs
Keyword(s):  
Mechanical Properties ◽  
20Th Century ◽  
Mechanical Response ◽  
Early 20Th Century ◽  
Inelastic Behavior ◽  
Silicate Slag ◽  
Wrought Iron ◽  
Generalized Method Of Cells ◽  
The Relationship

ABSTRACTThe discovery of the RMS Titanic has led to a number of scientific studies, one of which addresses the role that the structural materials played in the sinking of the ship. Chemical, microstructural, and mechanical analysis of the hull steel suggests that it was state-of-the-art for 1912 with adequate fracture toughness for the application. However, the quality of the wrought iron rivets may have been an important factor in the opening of the steel plates during flooding. Preliminary studies of Titanic wrought iron rivets revealed an orthotropic, inhomogeneous composite material composed of glassy iron silicate (slag) particles embedded in a ferrite matrix. To date, very little is understood about the properties of wrought iron from that period. Therefore, in order to assess the quality of the Titanic material, contemporary wrought iron was obtained from additional late 19th/early 20th century buildings, bridges, and ships for comparison. Image analysis completed on the Titanic wrought iron microstructure showed a high slag content that is very coarse and unevenly distributed. To investigate how microstructure impacts the mechanical properties, and hence the quality of late 19th/early 20th century wrought iron, a detailed analysis of the relationship between the microstructural features and the mechanical behavior was completed. Here we present the first step in that process: the use of the Generalized Method of Cells (GMC) to predict the mechanical response of composites with variable microstructural properties. The GMC tool is used to generate the effective inelastic behavior of the composite from the individual constituent properties.

A Quantitative Evaluation of the Quality of Recycled Steel in Uganda

2012 ◽  
Author(s):  
C. Senfuka ◽  
J. B. Kirabira ◽  
J. K. Byaruhanga
Keyword(s):  
Mechanical Properties ◽  
Raw Material ◽  
Emission Spectrometry ◽  
Test Results ◽  
Geometrical Properties ◽  
Direct Reduced Iron ◽  
The Relationship ◽  
Recycled Steel ◽  
Made In

All steel made in Uganda is currently manufactured from scrap. Such steel has often been characterized by unpredictable performance in consonance with its inconsistent raw material inputs. This study evaluates and relates the mechanical, metallurgical and geometrical properties of these bars in order to identify the factors underlying the performance of the products from this steel and examine the relationship with their scrap content. In order to study the steels, tensile, torsion and micrographic tests have been carried out together with spark emission spectrometry on samples collected from different plants. The test results generally indicate impressive steel resilience, strength and metallographic properties in spite of relatively high and irregular carbon content. Limited weldability, uniaxiality of properties, uneven scatter of microelements and substantial non-uniformity of longitudinal mechanical properties have been observed. Rolling and post rolling defects have been noted. The geometric reliability of the bars has also been found generally low. Improvement of secondary refinement, use of direct reduced iron (DRI) diluent and more diligent sorting have suggested as solutions.

scholarly journals Variações Termo-Higrométricas e Estudo de Ilha de Calor Urbana na Cidade de Bragança-PA e Circunvizinhança (Thermo-Hygrometric Variations and Study of Urban Heat Island in the City of Bragança-PA and Surrounding Region)

2016 ◽  
Vol 9 (2) ◽  
pp. 571
Author(s):  
Abnoã Da Costa Costa ◽  
Hernani Rodrigues ◽  
Jefferson Costa ◽  
Paulo Souza ◽  
Joao Silva Junior ◽  
...  
Keyword(s):  
Air Temperature ◽  
Meteorological Parameters ◽  
Heat Island ◽  
Urban Centers ◽  
Heat Islands ◽  
Urban Heat ◽  
Relationship Of ◽  
The Relationship ◽  
The City

Estudou-se algumas variáveis e parâmetros meteorológicos no período de 17 a 21 de novembro de 2014, na cidade de Bragança-PA e circunvizinhança, com a finalidade de entender como elas interferem no microclima da cidade e com isso fazer um estudo com a finalidade de obter uma breve característica do microclima na região. Os resultados mostraram que houveram diferenças de temperaturas entre os pontos, ou seja, algumas características de cada local influenciaram no aumento ou diminuição da temperatura do ar. A relação dos dados com as características de uso e ocupação do solo demonstrou uma influência significativa onde havia vegetação, devido a diminuição da temperatura do ar noturna e, consequentemente, minimização das ilhas de calor. Foi verificado também que as áreas com maior ocupação com construções e com maior pavimentação perderam menos calor, levando à formação de pequenas ilhas de calor noturnas mais intensas. Assim percebeu-se que na cidade, bem como aquelas que passaram por processos de urbanização, segundo literatura, possuem ilha de calor, que consiste em temperaturas mais elevadas durante a noite, causando assim o desconforto humano. Com isso, as alterações microclimáticas na cidade de Bragança-PA, assim como em outros centros urbanos, em geral são causadas pela ação antrópica e que interferem na qualidade de vida da população. Este trabalho é importante para a publicação nesta revista devida a sua contribuição cientifica para a sociedade.     A B S T R A C T We studied some variables and meteorological parameters in the period from 17 to 21 November 2014 in the city of Bragança-PA and surrounding region, in order to understand how they impact on the city's microclimate and thus make a study for the purpose of get a brief characteristic of the microclimate in the region. The results showed that there were differences in temperature between the points, that is, some features of each local influence on the increase or decrease of air temperature. The relationship of the data with the characteristics of use and land cover showed a significant influence where there was vegetation, because influenced the decrease in the night air temperature and thus minimize heat islands. It was also found that the areas with higher occupancy with buildings and more paving lost less heat, leading to the formation of smaller more intense nocturnal heat islands. So it was noticed that in the city, as well as those who have gone through processes of urbanization, according to literature, have heat island, consisting of higher temperatures during the night, thus causing certain human discomfort. With that, the microclimate changes in the city of Bragança-PA, as well as other urban centers in general are caused by human activities that interfere with people's quality of life. This work is important for publication in the magazine due to their scientific contribution to society Keywords: Bragança-PA, heat island, air temperature.   

Seam Quality: Experimental and Modelling Works using the Structural Equation Methodology

2010 ◽  
Vol 7 (1) ◽  
pp. 13
Author(s):  
Suzaini Abdul Ghani ◽  
Hugh Gong
Keyword(s):  
Mechanical Properties ◽  
Evaluation System ◽  
Structural Equation ◽  
Light Weight ◽  
Simple Test ◽  
Needle Size ◽  
Equation Modelling ◽  
Tensile Tester ◽  
The Relationship

Seam quality in terms of appearance and strength were investigated for very light weight fabrics (weight less than 80 g m-1;. Seams were constructed with different sewing parameters, which included types of thread, stitch densities and needle size. Before constructing the seam for appearance and strength evaluation the mechanical properties of all fabrics were determined. The mechanical properties of 48 fabrics were determined using the Kawabata Evaluation System (KES-F), the Fabric Assurance Simple Test (FAST) and an lnstron Tensile Tester. Evaluation of seam quality was performed with respect to all the sewing parameters and the seams were ranked accordingly. The same evaluation ranking for seam appearance and strength was used for further analysis using Structural Equation Modelling (SEM) under AMOS. SEM was used to establish the relationship between seam quality with respect to appearance and strength, and fabric mechanical properties. SEM was adopted to perform confirmative analysis to identify the fabrics mechanical properties that influence seam quality. From the experimental work, it was established that seams constructed with I 00 % spun polyester thread with a ticket number of 75 gave the best ranking in terms of seam strength. This thread performed at optimum values when used with 6.5 stitches per centimetre (spcm) with a Metric needle size (Nm) of 90. For seam appearance, I 00 % spun polyester with a ticket number of 120 and Metric needle size of 80 gave the best ranking. SEM established that extensibility and shear were the main fabric mechanical properties that determine seam quality of very light weight fabrics. 

Effect of Air Temperature and Humidity near the Ground under Moisture Conserving Irrigation of Straw Mulch

2011 ◽  
Vol 71-78 ◽  
pp. 3079-3086
Author(s):  
Xin Dong Wei ◽  
Xue Feng Yun ◽  
You Ke Wang
Keyword(s):  
Air Temperature ◽  
Theoretical Basis ◽  
Field Experiments ◽  
Straw Mulch ◽  
Maize Field ◽  
Temperature And Humidity ◽  
The Relationship

Based on the monitoring and analysis of field experiments, used the advanced auto-monitoring instruments, we studied the effect of air temperature and humidity near the ground under moisture conserving irrigation(MCI) of Straw Mulch in maize field. The result showed that the air temperature and humidity near the ground could be decreased and increased separately. The relationship between the air temperature and humidity near the ground can be expressed by Index equation. The view of this study is to provide a theoretical basis for promoting the technology of MCI of straw mulch.

scholarly journals PREDICTION OF LIFESPAN OF RAILWAY BALLAST AGGREGATE ACCORDING TO MECHANICAL PROPERTIES OF IT

2017 ◽  
Vol 12 (3) ◽  
pp. 203-209 ◽  
Author(s):  
Vaidas Ramūnas ◽  
Audrius Vaitkus ◽  
Alfredas Laurinavičius ◽  
Donatas Čygas ◽  
Aurimas Šiukščius
Keyword(s):  
Mechanical Properties ◽  
Los Angeles ◽  
Static Loading ◽  
Main Criterion ◽  
Railway Ballast ◽  
Los Angeles Abrasion ◽  
Structure Assessment ◽  
The Relationship ◽  
Selection Of

As the railway lifespan is the main criterion for selection of the aggregate for ballast and for planning the maintenance of the railroad, it is important to define the relationship between the particle load resistant characteristics and a lifetime of ballast in structure. Assessment of the quality of the ballast aggregate particles under dynamic and static loading reflect both, the toughness and hardness, and these are identified with the Los Angeles Abrasion and Micro-Deval Abrasion values. The model formerly developed by Canadian Pacific Railroads was adapted to predict possible loads expressed in cumulated tonnes. Different ballast aggregate mixtures were tested in the laboratory including dolomite and granite. Calculated potential gross tonnage (expressed in Million Gross Tonnes) of the railway per lifetime for each different aggregate type presented. The outcome of this research is established classification system of railway ballast aggregate and defined Los Angeles Abrasion and Micro-Deval Abrasion values of aggregate dependently on required lifetime.

scholarly journals Pengaruh Orientasi Bangunan Rumah Tinggal terhadap Kondisi Termal Kamar Tidur

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Yusmita Sari
Keyword(s):  
Air Temperature ◽  
Residential Buildings ◽  
Thermal Conditions ◽  
The Sun ◽  
The West ◽  
Software Simulation ◽  
Temperature And Humidity ◽  
Object Of Study ◽  
The Right

Orientasi bangunan terhadap arah matahari merupakan salah satu faktor yang memengaruhi kondisi termal di dalam ruang. Kondisi termal yang tidak nyaman dapat menurunkan produktifitas, kesehatan dan kualitas tidur manusia. Tulisan ini menjelaskan hasil studi yang bermaksud mengetahui pengaruh orientasi bangunan rumah tinggal terhadap kondisi termal 2 kamar tidur yang identik sama namun berbeda orientasinya terhadap matahari. Studi menggunakan metode ekperimental melakukan pengukuran suhu dan kelembaban udara pada objek studi sepanjang hari (24 jam) selama tujuh hari. Simulasi software Ecotect digunakan untuk menentukan hari yang tepat untuk melakukan pemantauan suhu dan kelembaban udara. Hasil studi menunjukkan bahwa suhu udara di kamar tidur yang berorientasi ke barat lebih tinggi dibandingkan suhu udara di kamar tidur yang berorientasi ke Selatan.   The orientation of the building to the direction of the sun is one of the factors that affect the thermal conditions in space. Uncomfortable thermal conditions can reduce the productivity, health, and quality of human sleep. This paper explains the results of the study which intends to determine the effect of the orientation of residential buildings on the thermal conditions of bedrooms that are identical but different in orientation to the sun. The study used the experimental method to measure temperature and humidity in the object of study throughout the day (24 hours) for seven days. Ecotect software simulation is used to determine the right day to monitor temperature and humidity. The results of the study show that the air temperature in bedrooms that are oriented to the west is higher than the air temperature in bedrooms that are oriented to the South.

scholarly journals Kinetics of Convective Drying and Quality of Pears Cultivars Conference, Lucas, Abate

2012 ◽  
Vol 69 (2) ◽  
Author(s):  
Ionuț VELEȘCU ◽  
Vasile DOBRE ◽  
Ioan ŢENU
Keyword(s):  
Technological Process ◽  
Air Temperature ◽  
Oxidation Process ◽  
Convective Drying ◽  
Maximum Speed ◽  
Drying Process ◽  
Temperature And Humidity ◽  
Kinetics Of

Abstract. The objective of this study is the kinetics process of drying of the pears cv. Conference, cv. Abate and cv. Lucas with a laboratory dryer, in order to identify at which level of humidity the maximum speed of evaporation is achieved and at which level of temperature and humidity pears slices begin to change (colour and shape) and to determine which one of the three tested varieties offers the best properties for drying, which will ensure that the final product is technologically and organoleptically the most acceptable. Drying parameters were the same for all three varieties: 2 hours at air temperature 90oC, 2 hours at air temperature 80oC, 2 hours at air temperature 70 C and 2 hours at air temperature 60o C.  The results showed that the sample of the cv. Conference has undergone the least oxidation process, rounded edges and shriveled slices, and samples of the cv Lucas showed the worst results. Following the drying process of all three varieties, it can be concluded that the cultivars Abate and Conference achieved the lower evaporation speed, unlike the cv. Lucas. The cultivars Conference and Abate have attained consistent drying and in this way the technological process was finished with a smaller temperature, resulting in a better quality of the final product. o

scholarly journals Effects of Air Temperature and Humidity on the Kinetics of Sludge Drying at Low Temperatures

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7722
Author(s):  
Zhenyu Wang ◽  
Lin Xu ◽  
Dong Liu ◽  
Qing Zhang ◽  
Anjie Hu ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Air Temperature ◽  
Experimental Results ◽  
Drying Rate ◽  
Maximum Relative Error ◽  
Linear Distribution ◽  
Thin Layer Drying ◽  
Temperature And Humidity ◽  
Sludge Drying ◽  
The Relationship

In this study, a low-air temperature sludge drying system was constructed and the effects of temperature and relative humidity on the characteristics of the system were investigated. The results showed that the drying rate of sludge increased with an increase in air temperature and a decrease in the air’s relative humidity. The influence of temperature on the average drying rate exhibited an approximate quadratic distribution, while the influence of relative humidity on the average drying rate exhibited an almost linear distribution. The relationship equations of the average drying rate, temperature, and humidity were summarized and compared with the experimental results, and the maximum relative error was 7.6375%. By comparing the experimental results with the commonly used thin-layer drying models, it was found that the sludge drying characteristics were more consistent with the Midilli model. Based on the relevant parameters of the Midilli model, the relationship between the segmented drying moisture content and the average drying rate was proposed, and the empirical formula of the drying rate and MR under different conditions was fitted.

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