False Twister and its Effect on Yarn Quality

False Twister and its Effect on Yarn Quality
Mohammad Zarrebini, Azam Alirezazadeh, Gholamreza Afkhami, Ali Salehi

Abstract
 Despite of undesirable effects of roving machine on the quality of final yarn and also production costs, this operation cannot be omitted from the conventional yarn manufacturing process. This is because in order to produce good quality yarns, it is vital to process the roving in a drawing operation [1]. It is well known that, irregularity in roving leads to an increase in the level of faults in the final yarn. Yarn quality is affected by various parameters and devices such as false twister unit. Generally twist is inserted due to rotation of the flyer [2]. The amount of twist must not exceed certain value. To observe the amount of twist inserted photographs showing the insertion of twist were taken. These together with dynamic relationships were used to propose an optimum model for the false twister unit. During insertion of twist, the roving is subjected to forces and moments. In the proposed model, twist angle is calculated by evaluation of the above forces and moments. Furthermore, the effect of frictional properties of false twister can be optimized using different values of twist angle. By comparison of the data obtained using the mathematical relations, an indication of the frictional properties of flyer can be made. Results show that false twisters with long grooves not only increase twist value but also intensifies the irregularity of the roving. Twist value will be increased due to the enlargement of the angle between roving and vertical axis.
 Keywords: false twist, roving frame, roving, flyer.

ﺑﺎﻓﺖ و ﻣﻘﺎﻳﺴﻪ ی ﭘﺎرﭼﻪ ﻫﺎی ﺳﺎده ﺣﻠﻘﻮی ﭘﻮدی از ﻧﺦ ﻫﺎی...

ﺑﺎﻓﺖ و ﻣﻘﺎﻳﺴﻪ ی ﭘﺎرﭼﻪ ﻫﺎی ﺳﺎده ﺣﻠﻘﻮی ﭘﻮدی از ﻧﺦ ﻫﺎی ﭘﻨﺒﻪ، ﭘﻨﺒﻪ - ﭘﻠﻲ اﺳﺘﺮ و ﭘﻨﺒﻪ - ﻧﺎﻳﻠﻮن
اﻟﻬﻪ ﻧﻴﺎزﺧﺎﻧﻲ، ﺳﻤﺎﻧﻪ اﺳﺪی آﻗﺒﻼغ،ﻋﻠﻲ اﺻﻐﺮ اﺻﻐﺮﻳﺎن ﺟﺪی  ، ﻣﻴﺮرﺿﺎ ﻃﺎﻫﺮی اﻃﺎﻗﺴﺮ

ﭼﻜﻴﺪه
در اﻳﻦ ﭘﮋوﻫﺶ، ﺳﻪ ﻧﻮع ﭘﺎرﭼﻪ ﺑﺎ ﺳﺎﺧﺘﺎر ﺑﺎﻓﺖ ﺳﺎده ﺣﻠﻘﻮی ﭘﻮدی، ﺑﺎ اﺳﺘﻔﺎد ه از ﻧـﺦ ﻫـﺎﻳﻲ از ﺟـﻨﺲ ﭘﻨﺒـﻪ، ﭘﻨﺒﻪ- ﭘﻠﻲ اﺳﺘﺮ و ﭘﻨﺒﻪ - ﻧﺎﻳﻠﻮن ﺑﺮ روی ﻣﺎﺷﻴﻦ ﺑﺎﻓﻨﺪﮔﻲ ﮔﺮدﺑﺎف ﻳﻜـﺮو ﺳـﻴﻠﻨﺪر ﺑﺎﻓﺘـﻪ ﺷـﺪه و ﭘـﺲ از اﻧﺠـﺎم ﻋﻤﻠﻴﺎت ﺷ ﺴﺘﺸﻮ، آزﻣﺎﻳﺶ ﻫﺎی ﻣﺘﻌﺪدی ﻧﻈﻴﺮ ﻣﻘﺎ وﻣﺖ در ﺑﺮاﺑﺮ ﺳﺎﻳﺶ، ﭘﺮزدﻫﻲ، ﻣﻘﺎوﻣـﺖ در ﺑﺮاﺑـﺮ ﭼـﺮوک، ﺟﺬب رﻃﻮﺑﺖ و ﺗﻌﻴﻴﻦ ﺧﻮاص ﻛﺸﺸﻲ ﺑﺮ روی آﻧﻬﺎ ﺻﻮرت ﮔﺮﻓﺖ. ﻧﺘﺎﻳﺞ ﺣﺎﻛﻲ از آن اﺳﺖ ﻛﻪ ﭘﺮزدﻫﻲ ﭘﺎرﭼﻪ ﭘﻨﺒﻪ- ﻧﺎﻳﻠﻮن ﻛﻤﺘﺮ از ﺳﺎﻳﺮ ﭘﺎرﭼﻪ ﻫﺎ ﺑﻮده اﻣﺎ ﻣﻘﺎوﻣﺖ در ﺑﺮاﺑﺮ ﭼ ﺮوک و ﺧﻮاص ﻛﺸﺸﻲ ﭘﺎرﭼﻪ ﭘﻨﺒﻪ - ﭘﻠﻲاﺳﺘﺮ ﺑﻴﺸﺘﺮ از ﭘﻨﺒﻪ - ﻧﺎﻳﻠﻮن ﻣﻲ ﺑﺎﺷﺪ . ﻫﻤﭽﻨﻴﻦ، ﺟﺬب رﻃﻮﺑﺖ در ﭘﺎرﭼﻪ ﭘﻨﺒﻪ - ﻧﺎﻳﻠﻮن و ﻣﻘﺎوﻣﺖ ﺳﺎﻳﺸﻲ در ﭘﺎرﭼﻪ ﭘﻨﺒﻪ- ﭘﻠﻲاﺳﺘﺮ، ﺑﻴﺸﺘﺮﻳﻦ ﻣﻘﺪار را در ﺑﻴﻦ ﺳﺎﻳﺮ ﭘﺎرﭼﻪ ﻫﺎ دارا ﻣﻲﺑﺎﺷﻨﺪ .ﺑﺎ اﺳﺘﻨﺎد ﺑﻪ ﻧﺘﺎﻳﺞ ﻓﻮق و در ﻧﻈﺮ ﮔﺮﻓﺘﻦ وﻳﮋﮔﻲ ﻫﺎی ﻣﻮرد ﻧﻴﺎز ﭘﻮﺷﺎک ﻧﻈﺎﻣﻲ، (ﻧﻈﻴﺮ ﺟﺬب رﻃﻮﺑﺖ ﻣﻨﺎﺳـﺐ، ﭘﺮزدﻫﻲ ﻛﻢ، اﻧﻌﻄﺎفﭘﺬﻳﺮی و...) ﻣﻲﺗﻮان اﺳﺘﻨﺒﺎط ﻧﻤﻮد ﻛـﻪ اﺳـﺘﻔﺎده از ﭘﺎرﭼـﻪ ﭘﻨﺒـﻪ - ﻧـﺎﻳﻠﻮن در اﻳـﻦ ﻧـﻮع ﭘﻮﺷﺎک، ﻧﺴﺒﺖ ﺑﻪ دو ﭘﺎرﭼﻪ دﻳﮕﺮ ﻛﻪ در اﻳﻦ ﻣﻘﺎﻟﻪ ﭘﻴﺸﻨﻬﺎد ﺷﺪه اﺳﺖ، ﺑﺮﺗﺮی دارد .
واژهﻫﺎی ﻛﻠﻴﺪی: ﺧﻮاص ﻛﺸﺸﻲ ، ﺟﺬب رﻃﻮﺑﺖ، ﻣﻘﺎوﻣﺖ ﺳﺎﻳﺸﻲ، ﭘﺮزدﻫﻲ ، ﻣﻘﺎوﻣﺖ در ﺑﺮاﺑﺮ ﭼﺮوک

ﻣﻄﺎﻟﻌﻪ ﺗﺄﺛﻴﺮ ﻓﺎﻛﺘﻮر ﺗﺠﻤﻊ اﻟﻴﺎف در ﺳﻄﺢ ﻣﻘﻄﻊ ﻧﺦ ﺑﺮ.......

ﻣﻄﺎﻟﻌﻪ ﺗﺄﺛﻴﺮ ﻓﺎﻛﺘﻮر ﺗﺠﻤﻊ اﻟﻴﺎف در ﺳﻄﺢ ﻣﻘﻄﻊ ﻧﺦ ﺑﺮ ﺧﻮاص ﻓﻴﺰﻳﻜﻲ و  ﻣﻜﺎﻧﻴﻜﻲ ﻧﺦ رﻳﻨﮓ ﺗﻮﻟﻴﺪ ﺷﺪه از اﻟﻴﺎف ﻻﻳﻮﺳﻞ
 ﻣﺠﻴﺪ ﺻﻔﺮ ﺟﻮﻫﺮی ، ﻣﺮﻳﻢ ﺻﺎﻟﺤﻲ اﺳﻔﻨﺪاراﻧﻲ

ﭼﻜﻴﺪه
در اﻳﻦ ﻣﻄﺎﻟﻌﻪ ﻓﺎﻛﺘﻮر ﺗﺠﻤﻊ اﻟﻴﺎف ﻻﻳﻮﺳﻞ در ﺳﻄﺢ ﻣﻘﻄﻊ ﻧﺦ رﻳﻨﮓ ﻣﻮرد ﺑﺮرﺳﻲ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ.روش ﻣﻮرد اﺳﺘﻔﺎده ﺟﻬﺖ اﻧﺪازه ﮔﻴﺮی ﻓﺎﻛﺘﻮر ﺗﺠﻤﻊ اﻟﻴﺎف در ﺳﻄﺢ ﻣﻘﻄﻊ ﺗﺦ، ﭘﺮدازش ﺗﺼﻮﻳﺮ اﺳﺖ ﻛﻪ در اﻣﺮ اﺳﺘﺨﺮاج اﻃﻼﻋﺎت از ﺳﻄﺢ ﻣﻘﻄﻊ ﺑﺴﻴﺎر ﻣﺆﺛﺮ ﻣﻲ ﺑﺎﺷﺪ، دﻗﺖ و ﺳﺮﻋﺖ از ﺧﺼﻮﺻﻴﺎت ﺑﺎرز اﻳﻦ روش اﺳﺖ. از ﺧﺼﻮﺻﻴﺎت ﺑﺎرز روش ﻣﻄﺮح ﺷﺪه در اﻳﻦ ﺗﺤﻘﻴﻖ، ﺗﻮاﻧﺎﻳﻲ ﻣﺤﺎﺳﺒﻪ اﻳﻦ ﻓﺎﻛﺘﻮر ﺑﺮای ﻧﺨﻬﺎی ﺣﺎﺻﻞ از اﻟﻴﺎف ﺑﺎ ﻣﻘﻄﻊ ﻏﻴﺮ داﻳﺮه ای و ﺗﻮﻟﻴﺪ ﺷﺪه در ﺳﻴﺴﺘﻤﻬﺎی رﻳﺴﻨﺪﮔﻲ ﻣﺘﻔﺎوت اﺳﺖ. ﻧﺘﺎﻳﺞ ﻧﺸﺎن ﻣﻲ دﻫﺪ، ﻓﺎﻛﺘﻮر ﺗﺠﻤﻊ در ﺳﻄﺢ ﻣﻘﻄﻊ ﻧﺦ ﻧﺎﻳﻜﻨﻮاﺧﺖ اﺳﺖ و ﺑﻪ ﺳﻤﺖ ﺳﻄﺢ ﻧﺦ ﺟﺎﻳﻲ ﻛﻪ آراﻳﺶ اﻟﻴﺎف ﻧﺎﭼﻴﺰ اﺳﺖ ﻛﺎﻫﺶ ﻣﻲ ﻳﺎﺑﺪ. ﻧﺘﺎﻳﺞ ﻧﺸﺎن ﻣﻲ دﻫﺪ، اﻓﺰاﻳﺶ ﻓﺎﻛﺘﻮر ﺗﺠﻤﻊ، اﻓﺰاﻳﺶ ﻧﻴﺮو ﺗﺎ ﺣﺪ ﭘﺎرﮔﻲ و ازدﻳﺎد ﻃﻮل ﺗﺎ ﭘﺎرﮔﻲ و ﻛﺎﻫﺶ ﭘﺮزﻳﻨﮕﻲ را ﺑﺎﻋﺚ ﻣﻲ ﺷﻮد .
واژهﻫﺎی ﻛﻠﻴﺪی : ﻓﺎﻛﺘﻮر ﺗﺠﻤﻊ، ﭘﺮدازش ﺗﺼﻮﻳﺮ، ازدﻳﺎد ﻃﻮل ﺗﺎ ﭘﺎرﮔﻲ، ﻧﻴﺮو ﺗﺎ ﭘﺎرﮔﻲ، ﭘﺮزﻳﻨﮕﻲ

Effect of Abrasion Process on Bagging Behavior of Cotton Woven F

Effect of Abrasion Process on Bagging Behavior of Cotton Woven Fabrics
Mohsen Shanbeh, Behnaz Baghaei, Nilufar Soheili nazhand

Abstract
 Abrasion is the mechanical deterioration of fabric components by rubbing them against another surface. Abrasion ultimately results in the loss of performance characteristics, such as strength, but it also affects the appearance of a fabric such as change in surface appearance, fading of color of the garment, failure of the seams of the garment. Bagging is a three-dimensional residual deformation, seen in used garments, which cause deterioration in the appearance of the garment. In this research, the influence of abrasion process as a process which affects the structural properties of fabrics on bagging fatigue of cotton woven fabrics in different weave patterns was evaluated. The method proposed by zhang was used for evaluation of bagging properties of samples. The bagging fatigue of fabrics was measured after 600 and 1600 abrasion cycles. The obtained results show that abrasion process and weave patterns had influence on bagging behavior of cotton woven fabrics.
Keywords: cotton woven fabrics, bagging behavior, abrasion resistance, bagging fatigue.

Evaluating the Pull-Out Force of Pile Yarn in Terry Fabrics by U

Evaluating the Pull-Out Force of Pile Yarn in Terry Fabrics by Using Linear Regression
D.Najafzadeh,M.Shanbeh, , S.A.Hoseini

Abstract
 This investigation concerns the estimation of pull out force of loop pile of terry towels as a important parameter which could determine the quality and serviceability of terry towels, using multiple linear regression algorithm. The input parameters of regression models was count of pile yarn, count of weft yarn, weft density, and the kind of raw material of weft yarn. So, 24 terry woven fabrics with classical three-weft weaves were produced. Two separate model for prediction the pull out force of first and forth loop pile was fitted. The aim of this investigation was to find out how the level of pull out force, depends on the mentioned parameters. The obtained results showed that the count of pile yarn and count of weft yarn have more effect on pull out force of pile yarn respectively. Moreover, the average value of prediction error for first and forth loop pile was 17.19% and 15.46%.
Keywords: Terry Towel, Pull out Force, Loop Pile, Multiple Linear regression

Influence of being Discontinuous Straight Yarns on Mechanical Pr

Influence of being Discontinuous Straight Yarns on Mechanical Properties of Multiaxial Fabrics
Marzie Aghajnai1, Ali. A.A.Jeddi , S.Hamze3, H.Bahrami

Abstract
 Multiaxial knitted non-crimp fabrics (NCFs) are relatively new textile materials form that are being considered as an alternative to biaxial woven and unidirectional broad goods .Because of necessity of multiaxial fabric using and also no possibility to knit this kind of fabric in our country and lower production speed of these fabrics in comparison of ordinary warp knitted fabrics, this investigation was designed to produce a new method of knitting to achieve a type of multiaxial fabric.

ﺑﻬﻴﻨﻪ ﺳﺎزی ﺧﺼﻮﺻﻴﺎت ﻓﻴﺰﻳﻜﻲ و ﻣﻜﺎﻧﻴﻜﻲ ﻧﺦ ﻣﻐﺰی دار . ..

ﺑﻬﻴﻨﻪ ﺳﺎزی ﺧﺼﻮﺻﻴﺎت ﻓﻴﺰﻳﻜﻲ و ﻣﻜﺎﻧﻴﻜﻲ ﻧﺦ ﻣﻐﺰی دار ﺗﻮﻟﻴﺪ ﺷﺪه ﺑﺮ روی ﺳﻴﺴﺘﻢ رﻳﺴﻨﺪﮔﻲ ﺳﺎﻳﺮو ﺑﺎ اﺳﺘﻔﺎده از ﺷﺒﻜﻪ ﻫﺎی ﻋﺼﺒﻲ
ﺣﺴﻴﻦ ﺣﺴﻨﻲ ، ﻋﻠﻴﺮﺿﺎ ﺷﻴﺎﺳﻲ  ، دارﻳﻮش ﺳﻤﻨﺎﻧﻲ  ، اﺳﻤﺎﻋﻴﻞ ﻧﺼﻴﺮ ﻧﻴﺎی ﻓﺎروج

ﭼﻜﻴﺪه:
در اﻳﻦ ﭘﺮوژه ﺷﺮاﻳﻂ رﻳﺴﻨﺪﮔﻲ ﻧﺦ ﻣﻐﺰی دار ﺑﻪ روش ﺳﺎﻳﺮو ﺑﺮای دﺳﺘﻴﺎﺑﻲ ﺑﻪ ﻣﻨﺎﺳﺐ ﺗﺮﻳﻦ ﺧﺼﻮﺻﻴﺎت ﻧﺦ ﺑﻬﻴﻨﻪ ﺳﺎزی ﻣﻲ ﺷﻮد . ﻣﻮﻗﻌﻴﺖ ﻧﺦ ﻣﻐﺰی در ﺣﻴﻦ ﺗﻐﺬﻳﻪ ﺑﻪ ﺣﺪﻓﺎﺻﻞ ﻣﺎﺑﻴﻦ دو ﻧﻴﻤﭽﻪ ﻧﺦ، زاوﻳﻪ ﺗﻐﺬﻳﻪ ﻧﺦ ﻣﻐﺰی ﻧﺴﺒﺖ ﺑﻪ راﺳﺘﺎی ﺣﺮﻛﺖ ﻧﻴﻤﭽﻪ ﻧﺦ در ﺳﻴﺴﺘﻢ ﻛﺸﺸﻲ، ﻣﻘﺪار ﺗﺎب ﻧﺦ، ﻣﻘﺪار ﻛﺸﺶ اﻋﻤﺎل ﺷﺪه و ﻓﺎﺻﻠﻪ ﻣﺎﺑﻴﻦ ﻧﻴﻤﭽﻪ ﻧﺨﻬﺎی ﺗﻐﺬﻳﻪ ﺷﺪه ، از ﻋﻮاﻣﻞ ﺗﺎﺛﻴﺮ ﮔﺬار ﺑﺮ ﺧﺼﻮﺻﻴﺎت ﻓﻴﺰﻳﻜﻲ و ﻣﻜﺎﻧﻴﻜﻲ ﻧﺦ ﻣﻐﺰی دار رﻳﺴﻴﺪه ﺷﺪه ﺑﺮوش ﺳﺎﻳﺮو اﺳﺖ. دو ﻧﻴﻤﭽﻪ ﻧﺦ ﭘﻨﺒﻪ-
ﭘﻠﻲ اﺳﺘﺮ ﺑﺎ ﻧﻤﺮه 1.05 ﻫﻨﻚ و ﻧﺦ اﻻﺳﺘﺎن ﺑﺎ ﻧﻤﺮه 40 دﺳﻲ ﺗﻜﺲ ﺑﻪ ﺳﻴﺴﺘﻢ ﻛﺸﺸﻲ و ﭘﺸﺖ ﻏﻠﺘﻚ ﺗﻮﻟﻴﺪ ﺗﻐﺬﻳﻪ ﺷﺪه و ﻧﺦ ﻧﻤﺮه 20 اﻧﮕﻠﻴﺴﻲ ﺗﻮﻟﻴﺪ ﮔﺮدﻳﺪ . ﺷﺒﻜﻪ ﻋﺼﺒﻲ از ﻧﻮع اﻧﺘﺸﺎر ﺧﻄﺎی ﭘﺴﺮو ﺑﺎ ﻧﺮخ آﻣﻮزش 0.1 ﻛﻪ 80 % داده ﻫﺎ ﺑﺮای آﻣﻮزش و 10% ﺑﺮای ﻣﻌﺘﺒﺮ ﺳﺎزی و 10% ﺑﺮای آزﻣﺎﻳﺶ ﺷﺒﻜﻪ اﺳﺘﻔﺎده .ﺷﺪ ﺧﻄﺎی آﻣﻮزش ﺷﺒﻜﻪ 1.26% ﻣﻌﺘﺒﺮ ﺳﺎزی1.42 و% آزﻣﺎﻳﺶ 1.39% ﻣﻲ ﺑﺎﺷﺪ ..
ﻛﻠﻤﺎت ﻛﻠﻴﺪی: ﺧﺼﻮﺻﻴﺎت ﻓﻴﺰﻳﻜﻲ و ﻣﻜﺎﻧﻴﻜﻲ، ﺳﻴﺴﺘﻢ رﻳﺴﻨﺪﮔﻲ ﺳﺎﻳﺮو، ﻧﺦ ﻣﻐﺰی دار، ﺷﺒﻜﻪ ﻋﺼﺒﻲ

ﻣﺪﻟﻲ ﺑﺮای ﺗﻌﻴﻴﻦ ﺿﺮﻳﺐ ﺗﺨﻠﺨﻞ ﭘﺎرﭼﻪ ﻫﺎی دو ﺷﺎﻧﻪ ﺣﻠﻘﻮی...

ﻣﺪﻟﻲ ﺑﺮای ﺗﻌﻴﻴﻦ ﺿﺮﻳﺐ ﺗﺨﻠﺨﻞ ﭘﺎرﭼﻪ ﻫﺎی دو ﺷﺎﻧﻪ ﺣﻠﻘﻮی ﺗﺎری
ﺣﺴﻴﻦ ﺣﺴﻨﻲ، ﺳﻌﻴﺪ آﺟﻠﻲ ،ﻓﺎﻃﻤﻪ ﻳﻮﺳﻔﻲ ﻣﻨﺶ  ، رﺿﺎ ﺣﺴﺎﻣﻲ

ﭼﻜﻴﺪه :
در اﻳﻦ ﻣﻘﺎﻟﻪ ﻣﺪﻟﻲ ﺗﺌﻮری ﺑﺮای ﺗﺨﻤﻴﻦ ﺿﺮﻳﺐ ﺗﺨﻠﺨﻞ ﭘﺎرﭼﻪ ﻫﺎی دو ﺷﺎﻧﻪ ﺣﻠﻘﻮی ﺗﺎری ﺑﺮاﺳﺎس وﻳﮋﮔﻴﻬﺎی ﻫﻨﺪﺳﻲ ﭘﺎرﭼﻪ ﻧﻈﻴﺮ ﻓﺎﺻﻠﻪ ﻣﺎﺑﻴﻦ رج و ردﻳﻒ، ﺿﺨﺎﻣﺖ ﭘﺎرﭼﻪ، ﻧﻤﺮه ﻧﺦ و داﻧﺴﻴﺘﻪ ﺣﺠﻤﻲ اﻟﻴﺎف ﺑﻜﺎر رﻓﺘﻪ در ﭘﺎرﭼﻪ ﭘﻴﺸﻨﻬﺎد ﺷﺪه اﺳﺖ. ﭘﺎرﭼﻪ ﻫﺎی اﺳﺘﺎﻧﺪارد دو ﺷﺎﻧﻪ ﺣﻠﻘﻮی ﺗﺎری از ﺟﻨﺲ ﭘﻠﻲ اﺳﺘﺮ و ﻧﺎﻳﻠﻮن ﺑﺎ ﺗﺮاﻛﻢ ﺳﻄﺤﻲ ﻣﺘﻔﺎوت ﺗﻮﻟﻴﺪ ﺷﺪه و ﺿﺮﻳﺐ ﺗﺨﻠﺨﻞ و ﺿﺮﻳﺐ ﻧﻔﻮذ ﻫﻮا اﻧﺪازه ﮔﻴﺮی ﮔﺮدﻳﺪ . ﻧﺘﺎﻳﺞ آزﻣﺎﻳﺶ ﻧﺸﺎن دﻫﻨﺪه ﺿﺮﻳﺐ ﻫﻤﺒﺴﺘﮕﻲ ﺑﺎﻻ ﻣﺎﺑﻴﻦ ﻣﻘﺎدﻳﺮ ﺗﺌﻮرﻳﻜﻲ ﻣﺤﺎﺳﺒﻪ ﺷﺪه ﺑﺮ اﺳﺎس ﻣﺪل و ﻣﻘﺎدﻳﺮ اﻧﺪازه ﮔﻴﺮی ﺷﺪه ﺑﺮای ﺿﺮﻳﺐ ﺗﺨﻠﺨﻞ ﭘﺎرﭼﻪ ﻫﺎ (0,896) و ﻧﻴﺰ ﺿﺮﻳﺐ ﻧﻔﻮذ ﻫﻮا (0,686) ا ﺳﺖ. ﻧﺘﺎﻳﺞ ﻧﺸﺎن دﻫﻨﺪه ﻣﻌﺘﺒﺮ ﺑﻮدن ﻣﺪل ﺗﺌﻮری اراﻳﻪ ﺷﺪه ﺑﺮای ﺿﺮﻳﺐ ﺗﺨﻠﺨﻞ ﭘﺎرﭼﻪ ﻫﺎی ﻣﻮرد آزﻣﺎﻳﺶ اﺳﺖ.
واژه ﻫﺎی ﻛﻠﻴﺪی: ﺿﺮﻳﺐ ﺗﺨﻠﺨﻞ، ﭘﺎرﭼﻪ ﻫﺎی دو ﺷﺎﻧﻪ ﺣﻠﻘﻮی ﺗﺎری، ، ﺿﺮﻳﺐ ﻧﻔﻮذ ﻫﻮا

ﺗﻮﻟﻴﺪ ﻧﻘﺸﻪ ﻓﺮش ﻣﺎﺷﻴنی ﺑﺎ اﺳﺘﻔﺎده از اﻟﮕﻮرﻳﺘﻢ ژﻧﺘﻴﻚ ..

ﺗﻮﻟﻴﺪ ﻧﻘﺸﻪ ﻓﺮش ﻣﺎﺷﻴنی باﺳﺘﻔﺎده از اﻟﮕﻮرﻳﺘﻢ ژﻧﺘﻴﻚ ﻣﺤﺎور
ﻣﺤﻤﺪ اﻣﺎﻧﻲﺗﻬﺮان، ﻣﺴﻌﻮد ﻟﻄﻴﻔﻲ ، ﻓﺎﻃﻤﻪ زﻣﺎﻧﻲ

ﭼﻜﻴﺪه
در اﻳﻦ ﺗﺤﻘﻴﻖ از اﻟﮕﻮرﻳﺘﻢ ژﻧﺘﻴﻚ ﻣﺤﺎورهای ﺗﻐﻴﻴﺮ ﻳﺎﻓﺘﻪ ﺟﻬﺖ ﺗﻮﻟﻴﺪ ﻧﻘﺸﻪﻫﺎی ﻓﺮش ﻣﺎﺷﻴﻨﻲ اﺳﺘﻔﺎده ﻣﻲﺷﻮد. ﻫﺮ ﻧﻘﺸﻪ ﻓﺮش ﺷﺎﻣﻞ ﻳﻚ دﺳﺘﻪ ﻃﺮحﻫﺎی ﭘﺎﻳﻪ ﻣﻲﺑﺎﺷﺪ. ﺑﻪ اﻳﻦ ﺟﻬﺖ، ﺗﻌﺪادی از ﻃﺮحﻫﺎی ﭘﺎﻳﻪ ﺟﻤﻊآوری، دﺳﺘﻪﺑﻨﺪی و ﺑﻪ ﺻﻮرت ژن ﮔﺪﮔﺰاری ﻣﻲﮔﺮدﻧﺪ. در ﻫﺮ ﻧﺴﻞ ﺟﻤﻌﻴﺖ ﺟﺪﻳﺪ ﺑﺮ اﺳﺎس ارزﻳﺎﺑﻲ ﻣﺸﺎﻫﺪه ﻛﻨﻨﺪه ﺷﻜﻞ ﻣﻲﮔﻴﺮد. ﺗﻤﺎﻣﻲ ﻃﺮحﻫﺎی اﻳﺠﺎد ﺷﺪه ﺑﻪ ﻃﻮر ﻫﻤﺰﻣﺎن ﺑﺮای ﺗﻌﻴﻴﻦ ﻣﻴﺰان ﺑﺮازﻧﺪﮔﻲ ﺑﻪ ﻣﺸﺎﻫﺪه ﻛﻨﻨﺪه ﻧﺸﺎن داده ﻣﻲﺷﻮﻧﺪ. ﺑﻪ اﻳﻦ ﺗﺮﺗﻴﺐ ﻳﻚ ﻧﺴﻞ ﺟﺪﻳﺪ ﺑﺎ اﺳﺘﻔﺎده از اﻟﮕﻮرﻳﺘﻢ ژﻧﺘﻴﻚ ﺣﺎﺻﻞ ﺧﻮاﻫﺪ ﺷﺪ. ﻧﺘﺎﻳﺞ ﻧﺸﺎن ﻣﻲدﻫﺪ ﻛﻪ ﺑﻌﺪ از ﭼﻨﺪ ﻧﺴﻞ ﻣﺤﺪود، ﻧﻘﺸﻪﻫﺎی ﻗﺎﺑﻞ ﻗﺒﻮﻟﻲ ﺣﺎﺻﻞ ﻣﻲﮔﺮدد. ﺳﺎﻣﺎﻧﻪ ﻃﺮاﺣﻲ ﺑﻪ ﻧﺤﻮی ﺗﻬﻴﻪ ﺷﺪه اﺳﺖ ﻛﻪ ﺗﻮﺳﻂ ﻛﺎرﺑﺮان ﻏﻴﺮﺣﺮﻓﻪای ﻧﻴﺰ ﻗﺎﺑﻞ اﺳﺘﻔﺎده ﺑﺎﺷﺪ .
 واژهﻫﺎی ﻛﻠﻴﺪی: اﻟﮕﻮرﻳﺘﻢ ژﻧﺘﻴﻚ ه ﻣﺤﺎور ای، ﻓﺮش ﻣﺎﺷﻴﻨﻲ، ﻧﻘﺶ

ﺗﺠﺰﻳﻪ ﺗﺤﻠﻴﻞ ﻣﻨﺤﻨﻲ ﻫﺎی ﻓﺸﺎر و ﺿﺨﺎﻣﺖ ﭘﺎرﭼﻪ ﻫﺎی ....

ﺗﺠﺰﻳﻪ ﺗﺤﻠﻴﻞ ﻣﻨﺤﻨﻲ ﻫﺎی ﻓﺸﺎر و ﺿﺨﺎﻣﺖ ﭘﺎرﭼﻪ ﻫﺎی ﺣﻠﻘﻮی ﭘﻮدی ﺑﻪ ﺟﻬﺖ ﺗﻮﺟﻴﻪ
رﻓﺘﺎر اﺑﻌﺎدی و ﻣﻜﺎﻧﻴﻜﻲ آن
وﺣﻴﺪ ﻣﺤﻤﺪی
اﺳﺘﺎدﻳﺎر، ﮔﺮوه ﻣﻬﻨﺪﺳﻲ ﻧﺴﺎﺟﻲ، داﻧﺸﻜﺪه ﻓﻨﻲ و ﻣﻬﻨﺪﺳﻲ، داﻧﺸﮕﺎه آزاد اﺳﻼﻣﻲ واﺣﺪ ﻗﺎﺋﻢ ﺷﻬﺮ،اﻳﺮان

ﭼﻜﻴﺪه
درﮔﺬﺷﺘﻪ ارﺗﺒﺎط ﺑﻴﻦ ﺿﺨﺎﻣﺖ ﭘﺎرﭼﻪ ﺑﺎ ﺑﺮﺧﻲ ا زﺧﻮاص ﻓﻴﺰﻳﻜﻲ وﻣﻜﺎﻧﻴﻜﻲ آن ﻫﻤﻮاره ﻣﻮﺿﻮع ﺗﺤﻘﻴﻖ ﺑﺴﻴﺎری از ﻣﺤﻘﻘﻴﻦ ﺑﻮده اﺳﺖ ﻛـﻪ ﻫﺮﻳـﻚ ﺗﻮاﻧﺴﺘﻨﺪ ﺑﻪ رواﺑﻄﻲ ﺟﻬﺖ ارزﻳﺎﺑﻲ رﻓﺘﺎر ﭘﺎرﭼﻪ دﺳﺖ ﻳﺎﺑﻨﺪ .دراﻳﻦ ﺗﺤﻘﻴﻖ ﺑﻪ ﺟﻬﺖ ﺗﻮﺳﻌﻪ ﺗﺤﻘﻴﻘﺎت، ﻧﻈﺮﻳﺎت وﺗﺌﻮری ﻫﺎی اراﺋﻪ ﺷﺪه ﺗﻮﺳﻂ ﻣﺤﻘﻘﻴﻦ درﭘﺎرﭼﻪ ﺗـﺎری وﭘـﻮدی ﺑﺮاﺳـﺎس ﻣﻨﺤﻨـﻲ ﻫـﺎی ﻓـﺸﺎر وﺿﺨﺎﻣﺖ در ﻣﻮرد ﺑﺮﺧﻲ از ﭘﺎرﭼﻪ ﻫﺎی ﺣﻠﻘﻮی ﭘﻮدی در داﻣﻨﻪ ای ازﺳﻄﺢ ﻓﺸﺎر 05/0 ﺗﺎ 500 ﻛﻴﻠﻮ ﭘﺎﺳﮕﺎل ﺑﻜﺎر ﮔﺮﻓﺘﻪ ﺷﺪ .ﻧﺘﺎﻳﺞ ﺑﺮرﺳﻲ ﻫﺎ ﻧﺸﺎن ﻣﻲ دﻫﺪ ﻛﻪ اﮔﺮﭼﻪ ﺳﺎﺧﺘﻤﺎن ﺳﻄﺢ ﭘﺎرﭼﻪ ﺗﺎری وﭘﻮدی ﭘﻨﺒﻪ ای ﺑﺎ ﺳﺎﺧﺘﻤﺎن ﭘﺎرﭼﻪ ای ﺣﻠﻘﻮی ﻣﺘ ﻔﺎوت اﺳﺖ وﻟﻴﻜﻦ رﻓﺘﺎر ﻓﺸﺎر وﺿﺨﺎﻣﺖ اﻳﻦ ﭘﺎرﭼﻪ ﻫﺎ ﻧﻴﺰ ﺑﻪ ﻃﻮر ﻋﻤﻠﻲ از ﭘﺎرﭼﻪ ﻫﺎی ﺣﻠﻘﻮی ﻣﺘﻔﺎوت اﺳﺖ وﻟﻴﻜﻦ رﻓﺘﺎر ﻓﺸﺎر وﺿﺨﺎﻣﺖ اﻳﻦ ﭘﺎرﭼﻪ ﻫﺎ ﻧﻴﺰ ﺑﻪ ﻃﻮر ﻋﻤﻠﻲ از اﺻﻮل و ﻗﻮاﻧﻴﻦ ون وﻳﻚ ﭘﻴﺮوی ﻣﻲ ﻛﻨﺪ . ﻫﻤﭽﻨﻴﻦ رﻓﺘﺎر ﺗﻐﻴﻴﺮات ﺿـﺨﺎﻣﺖ در ﭘﺎرﭼـﻪ ﻫـﺎی ﺣﻠﻘـﻮی ﺑـﺪﻟﻴﻞ ﻋـﺪم ﺛﺒـﺎت اﺑﻌـﺎدی د ارای ﺗﻐﻴﻴـﺮات ﺑﻴـﺸﺘﺮی در ﻣﻘﺎﻳـﺴﻪ ﺑـﺎ ﭘﺎرﭼـﻪ ﻫـﺎی ﺗﺎری و ﭘﻮدی اﺳﺖ .در ﻧﻬﺎﻳﺖ در ﺑﺮرﺳﻲ ﻣﻨﺤﻨﻲ ﻫﺎی ﻫﻴﺴﺘﺮزﻳﺲ ﻓﺸﺎر و ﺿﺨﺎﻣﺖ اﻳﻦ ﭘﺎرﭼﻪ ﻫﺎ ﻣﻼﺣﻈﻪ ﺷﺪ ﻛﻪ ﺗﻌﻴﻴﻦ داﻣﻨـﻪ ﻓـﺸﺎر ﺑـﺮای اﻧـﺪازه ﮔﻴـﺮی ﺿـﺨﺎﻣﺖ ﭘﺎرﭼﻪ ﺑﻪ ﻋﻮاﻣﻠﻲ از ﻗﺒﻴﻞ ﻋﺎﻣﻞ ﺳﺎﺧﺘﻤﺎﻧﻬﺎی ﭘﺎرﭼﻪ از ﻟﺤﺎظ ﻧﻮع ﺑﺎﻓﺖ، ﻓﺎﻛﺘﻮر ﺳﻔﺘﻲ و ﺟﻨﺲ ﭘﺎرﭼﻪ در ﺷﺮاﻳﻂ اﺳﺘﺮاﺣﺖ ﻫﺎ ﻣﺨﺘﻠﻒ ﺑﺴﺘﮕﻲ دارد .
واژه ﻫﺎی ﻛﻠﻴﺪی : ﻓﺸﺎر، ﺿﺨﺎﻣﺖ ، ﻫﻴﺴﺘﺮزﻳﺲ، ﺧﻮاص اﺑﻌﺎدی و ﻣﻜﺎﻧﻴﻜﻲ ، ﭘﺎرﭼﻪ ﺣﻠﻘﻮی ﭘﻮدی