نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد ، گروه مهندسی مکانیک، واحد کرمانشاه، دانشگاه آزاد اسلامی، کرمانشاه

2 استادیار، گروه مهندسی مکانیک، واحد کرمانشاه، دانشگاه آزاد اسلامی، کرمانشاه.

10.22068/jstc.2022.550531.1776

چکیده

هدف اصلی این مقاله، تعیین خواص کششی کامپوزیت‌های انعطاف پذیر طبیعی است. برای ساخت این کامپوزیت‌ها، الیاف طبیعی پنبه و لاتکس بترتیب بعنوان تقویت‌کننده و زمینه استفاده شدند. در گام اول، نمونه‌های لاتکس خالص ساخته شدند و تحت بار کششی آزمایش شدند. در مرحله بعد با استفاده از الیاف پنبه، لاتکس تقویت گردید و نمونه‌های ساخته شده تحت بار کششی قرار گرفتند. همچنین، از آلیاژ حافظه‌دار نیتینول برای بهبود خواص کششی لاتکس خالص و کامپوزیت‌های لایه‌ای پنبه/لاتکس استفاده گردید. لذا، یک، دو یا سه سیم نیتینول در نمونه لاتکس خالص و کامپوزیت‌های پنبه/لاتکس بکار برده شدند. نتایج مطالعات تجربی نشان دادند که در حضور الیاف طبیعی پنبه، استحکام لاتکس از 0.93 به 13.51 مگاپاسکال افزایش پیدا کرد. بعلاوه، مشاهده شد که به ازای افزودن یک، دو و سه سیم نیتینول، استحکام کششی نهایی نمونه‌های لاتکس خالص بطور تقریبی بترتیب 70، 500 و 800 درصد افزایش می‌یابد. در حالیکه استحکام کششی نهایی کامپوزیت‌های لایه‌ای به ازای افزودن یک، دو و سه سیم نینینول بطور تقریبی بترتیب 2، 20 و 40 درصد افزایش می‌یابد. همچنین، مقایسه نتایج این تحقیق با مطالعات سایر محققین نشان می‌دهد که با کامپوزیت‌های پنبه/اپوکسی تقویت شده با سیم نیتینول، استحکام کششی این ماده انعطاف‌پذیر از چرم‌های طبیعی و مصنوعی بطور قابل توجهی بزرگتر است.

کلیدواژه‌ها

عنوان مقاله [English]

Tensile properties of flexible latex-based composites reinforced by cotton fibers in the presence of shape memory alloys

نویسندگان [English]

  • Kaveh Bastam 1
  • Afshin Zeinedini 2

1 Department of Mechanical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

2 Department of Mechanical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran .

چکیده [English]

The main of this paper is to determine the tensile properties of natural flexible composites. In order to fabricate the composites, the cotton fibers and the latex were used as the reinforcement and matrix, respectively. At the first step, the latex samples were manufactured and tested under tensile loading. In the next step, using the cotton fiber the latex was reinforced and then tested under tensile loading. In addition, the NiTi shape memory alloy (SMA) wire was used to improve the tensile properties of the pure latex and the cotton/latex laminated composites. Therefore, one, two or three NiTi wires were used in the pure latex and cotton/epoxy composites samples. The results of experimental study displayed that in the presence of cotton fiber, the ultimate tensile strength of pure latex was increased from 0.93 to 13.51 MPa. Moreover, it was observed that due to adding one, two or three NiTi wires, the ultimate strength of the pure latex was enhanced almost 70, 500 and 800%, respectively. However, the ultimate tensile strength of the cotton/epoxy laminated composites in the presence of one, two and three NiTi wires was increased almost 2, 20 and 40%, respectively. In addition, comparison of the current research results with the other researchers’ investigations manifests that the cotton/epoxy composites reinforced by NiTi wire, the tensile strength of this flexible material is greater than the tensile strength of natural and artificial leathers.

کلیدواژه‌ها [English]

  • Composites
  • Latex
  • Cotton fiber
  • Shape memory alloy
  • tensile properties
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