تحلیل تاثیر میزان نیروی پیش کشش پیچ بر رفتار اتصال ترکیبی چسبی-مکانیکی کامپوزیتی

نوع مقاله: پژوهشی

نویسنده

استادیار، گروه مهندسی مکانیک، واحد مرودشت، دانشگاه آزاد اسلامی، مرودشت، ایران

چکیده

در این مقاله به بررسی تاثیرگذاری میزان نیروی پیش کشش وارد بر پیچ و گشتاور پیچشی ناشی از آن بر رفتار اتصالات ترکیبی چسبی و پیچی با قطعات کامپوزیتی لایه‌ای پرداخته شده است. بدین منظور با بهره‌گیری از نرم‌افزار اجزا محدود انسیس اتصال ترکیبی تک‌لبه کامپوزیتی به‌صورت سه بعدی شبیه‌سازی گردید. در ابتدا جهت انتخاب تعداد المان مناسب رفتار همگرایی اتصال انتخابی بررسی گردید. سپس در تحلیل‌های مختلف و با تغییر در مقدار نیروی پیش کشش پیچ و دنبال آن تغییر در گشتاور پیچشی وارد بر پیچ، تاثیر‌گذاری آن بر مولفه‌های تنشی پیچ و مهره، لایه‌های کامپوزیتی و لایه چسب و به دنبال آن بر چگونگی گسیختگی اتصال مورد بررسی قرار گرفت. با مقایسه نتایج حاصل از شبیه‌سازی با تحقیقات انجام گرفته توسط سایر محققین، اعتبارسنجی روش شبیه‌سازی ارائه شده مورد تایید قرار گرفت. نتایج حاصل از این پژوهش بیانگر این می‌باشد که افزایش نیروی پیش کشش تا زمانی‌که گسیختگی در پیچ و مهره رخ ندهد، موجب افزایش ظرفیت تحمل بار می‌شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Analysis of Bolt Pretension Load Effects on the Behavior of Hybrid Bonded-Bolted Composite Joints

نویسنده [English]

  • Ehsan Selahi
Department of Mechanical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
چکیده [English]

This paper is focused on the effects of bolt pretension load and bolt torque on the behavior of hybrid bonded-bolted joints with composite adherends. For this aim by employing the finite element software of ANSYS Workbench, three dimensional model of hybrid single lap composite joint is simulated. At first for selecting an appropriate element numbers, the convergence study is performed. Then by changing the amounts of the bolted pretension load and its torque, the effectiveness of them on the stress components in bolt and nut, adhesive layer and laminated composites are investigated.To demonstrate the validity of the presented simulation results, the obtained results are compared with the researches presented in the available literature. The results of this research is indicated that, increasing the pretension load, provided that failure does not occur in the bolt or nut, causes increases in the load-bearing capacity of the joint.

کلیدواژه‌ها [English]

  • Hybrid joint
  • Pretension load
  • Bolt and nut
  • Adhesive
  • Laminated composite
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