استفاده از روش همبستگی تصاویر دیجیتال در بررسی خواص کششی پارچه اسپیسر

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی نساجی - دانشگاه یزد - یزد - ایران

2 ،دانشکده مهندسی نساجی،دانشگاه یزد،یزد ،ایران

چکیده

اهمیت درک خواص پارچه ­های سه­بعدی اسپیسر، با توجه به کاربردهای بی‌شمار آن­ها در صنایع مختلف، دلیلی بر توسعه روش‌های سریع و دقیق تعیین خواص است. پارچه­ های اسپیسر در کاربردهای متعدد، تحت تأثیر نیرو قرار دارند؛ بنابراین شناخت رفتار و تغییر خواص آن­ها در مواجه با نیرو دارای اهمیت است. هدف از مقاله حاضر، بررسی تغییر شکل پارچه اسپیسر و تعیین جابجایی­ های محلی در پارچه، تحت نیروی کششی است. ازاین‌رو، از روش همبستگی تصاویر دیجیتال که یک روش مرسوم در تعیین جابه ­جایی­ ها و تغییر شکل یک سازه تحت بارگذاری خارجی است، استفاده شد. رفتار تغییر شکل ساختار پارچه اسپیسر با طرح واحد لوزی در دو جهت رج و ردیف، با استفاده از روش تجربی و در روش تئوری با استفاده از پردازش ویدئو و روش همبستگی تصاویر دیجیتال بررسی شد. با استفاده از پردازش ویدئو، تغییر شکل واحد در پارچه، توزیع جابجایی‌های محلی و میزان کرنش طولی و عرضی پارچه، تعیین و با روش تجربی مقایسه گردید. مقایسه نتایج حاصل از پردازش با نتایج تجربی نشان داد که روش پردازش ویدئو قادر به محاسبه جابه­ جایی محلی در تمام قسمت­های پارچه و پیش ­بینی میزان کرنش طولی و عرضی در کشش­های مختلف با خطای کمتر از 10% است.

کلیدواژه‌ها

عنوان مقاله [English]

Application of Digital Image Correlation to Study the Tensile Properties of Spacer Fabric

نویسندگان [English]

  • Neda Dehghan 1
  • Pedram Payvandy 2
1 Faculty of Textile Engineering, University of Yazd, Yazd, Iran,
2 Textile Engineering Dpt.Yazd University,Yazd,Iran
چکیده [English]

The importance of understanding three-dimensional spacer fabrics properties, is a reason to the development of rapid and accurate methods for determining properties, due to their numerous applications in various industries. In most applications, spacer fabrics are affected by tension; therefore, knowing their behaviour in the encounter with tension is important. The purpose of this paper is to investigate on deformation of the spacer fabric and determine the local displacements in this fabric under tension. So, the digital image correlation method was used, that is a usual method of determining the displacements and deformation of a structure under external loading. Deformation behaviour of the diamond shape unit the of spacer fabrics structure at different tensile strains, based on experimental observations and theoretical analysis using video processing and digital image correlation method was investigated in the course and wale direction. The fabric unit deformation, the distribution of the local displacements and longitudinal and transverse strain of fabric were determined using video processing and compared with experimental method. Comparison of results showed that video processing method is able to calculate the local displacement in fabric and predict the longitudinal and transverse strain at different tensile strains with an error coefficient less than 10%.

کلیدواژه‌ها [English]

  • Digital image correlation (DIC)
  • Spacer fabric
  • Local displacement
  • Tensile properties

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