پديد آورنده :
خابوري محمدي، سيمين
عنوان :
بررسي ارتباط بين سختي خمشي نخ و سختي خمشي پارچه تافته
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
تكنولوژي نساجي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده نساجي
صفحه شمار :
[الف]، هشت، 160، [II]ص.: مصور، جدول، شكل، نمودار
استاد راهنما :
محمد قانع، محمدشيخ زاده
استاد مشاور :
امير مهدي حلبيان
توصيفگر ها :
اندازه گيري رابطه ممان-انحنا , تكيه گاه غلتكي،مفصلي يا پايين دار، گيره دار , روش انتگرال گيري , مدول الاستيسيته و گشتاور ماند , دستگاه خمش شرلي
استاد داور :
محمدذره بيني، عبدالكريم حسيني
تاريخ ورود اطلاعات :
1396/09/08
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Abstract A simple supported beam system was used to measure the bending rigidity of yarn Theyarn was treated as an elastic beam fixed in one end and supported by a simple support inanother end and loaded somewhere near the middle Using the classic elastic equations inthe small deflection case the bending rigidity of yarns was calculated Comparisonbetween the shape of deflection of yarns and elastic beams in the small deflection caseshowed reasonable agreement It was concluded that the bending rigidity of yarns can becalculated by using the small deflection equations A simple support beam system deflected under its own weight was used to measure thebending modulus and the bending rigidity of fabrics Using the elastica classic theories thebending modulus of the fabrics were then calculated in both small and large deflectioncases Finite element method was used to solve the governing differential equations Theresults showed that increase in weft density leads to increase in bending modulus andbending rigidity per unit width of fabric The magnitude and slope of the modulus in theweft direction is higher than the warp direction A possible reason could be the higherinherent rigidity of the weft yarns The ratio of the bending rigidity of fabric per yarn to bending rigidity of yarn b by wasalso investigated Experimental results showed that increase in the weft density leads todecrease in b by in the weft direction and increase in b by in the warp direction whereasavailable theoretical formulas predict increase in b by in both directions This contradictionbetween experimental and theoretical results is consequence of yarn cross sectionaldeformation during fabric formation or in later processes for low twist yarn woven fabrics Images from the fabric surface showed flattening of the yarns and the theoretical formulaswhich are based on the circular cross section of the yarn can not be applied in this case
استاد راهنما :
محمد قانع، محمدشيخ زاده
استاد مشاور :
امير مهدي حلبيان
استاد داور :
محمدذره بيني، عبدالكريم حسيني
