نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، مهندسی مکانیک، دانشگاه گیلان، رشت، ایران

2 دانشیار، مهندسی مکانیک، دانشگاه گیلان، رشت، ایران

3 دانشجوی دکترا، مهندسی مکانیک، دانشگاه گیلان، رشت، ایران

چکیده

در این مقاله رفتار الکترومکانیکی کامپوزیت‌های هیبریدی تقویت‌شده با فیبر فازی حاوی نانولوله‌ی کربنی بررسی می‌شود. از یک مدل میکرومکانیکی سلول واحد و روابط ساختاری کوپل الکترومکانیکی برای به دست آوردن ثابت‌های الاستیک و الکتریکی کامپوزیت هیبریدی استفاده می‌شوند. این کامپوزیت‌های هیبریدی از فیبر پیزوالکتریک و نانولوله‌ی کربنی یه عنوان فاز تقویت و زمینه پلیمری ساخته شده است. فیبرهای پیزوالکتریکی با نانولوله‌های کربنی که در جهت شعاعی هم‌راستا شده‌اند پوشانده می‌شوند. یک ناحیه فاز میانی بین نانولوله‌ی کربنی و پلیمر به علت فعل و انفعالات بین نانولوله و زمینه پلیمری در نظر گرفته می‌شود. تاثیرات درصد حجمی و اندازه نانولوله‌ی کربنی بر خواص نهایی کامپوزیت هیبریدی بررسی شده است. این تاثیرات در جهت عرضی به علت هم‌راستا شدن نانولوله‌های کربنی در جهت شعاعی فیبر کربن قابل توجه است. با در نظر گرفتن PZT-7A به عنوان فیبر پیزوالکتریکی تقویت‌کننده، مطالعه‌ای بر روی خواص استحکام‌بخشی آن در مقایسه با PZT-5A انجام شده است تا یک کامپوزیت بهتری ساخته شود. با مقایسه مدل حاضر با یک مدل میکرومکانیکی دیگر، اعتبارسنجی مدل بررسی شده است. تطابق خوبی بین نتایج دو مدل میکرومکانیکی وجود دارد. هم‌چنین نتایج نشان می‌دهند که برای خواص الکترومکانیکی عرضی بهتر، استفاده کردن از نانولوله‌ی کربنی با قطر کمتر پیشنهاد می‌شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Micromechanical analysis of electro-elastic response of polymer composites reinforced with fuzzy fiber containing CNTs

نویسندگان [English]

  • mojtaba haghgoo 1
  • Reza Ansari Khalkhali 2
  • mohammad kazem Hassanzadeh-Aghdam 3

1 Department of Mechanical Engineering, Guilan University, rasht, Iran

2 Department of Mechanical Engineering, Guilan University, rasht, Iran

3 Department of Mechanical Engineering, Guilan University, rasht, Iran

چکیده [English]

In this paper the electromechanical behavior of fuzzy fiber reinforcement hybrid composites containing carbon nanotubes (CNTs) is investigated. A unit cell micromechanical model and electromechanical coupled constitutive equations are used to obtain the elastic and electrical coefficients of the hybrid composites. This hybrid composite is made up of piezoelectric fiber and CNT as reinforcement and polymer matrix. The piezoelectric fibers are coated with radially aligned CNTs. An interphase region is considered due to the interaction between CNT and matrix. The effect of volume fraction and size of CNT on the overall hybrid composite properties is investigated. These effects are remarkable in the transverse direction due to the aligned CNTs in the fiber radial direction. Considering PZT-7A as reinforcement piezoelectric fiber, study of its mechanical strength compared to PZT-5A was implemented in order to make a better composite. By comparing the proposed model with another micromechanical model, the validation of the proposed model is studied. Generally, a good agreement is observed between the results of these two models. The results also reveal that for the improved transverse electromechanical properties, using a CNT with a lower diameter is suggested.

کلیدواژه‌ها [English]

  • Micromechanics
  • Carbon Nanotube
  • Electro-elastic
  • Fuzzy fiber
  • Piezoelectric

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