Stress transfer modeling in viscoelastic polymer matrix composites with an internal damage
- سال انتشار: 1389
- محل انتشار: دومین کنفرانس بین المللی کامپوزیت
- کد COI اختصاصی: COMPOSIT02_086
- زبان مقاله: انگلیسی
- تعداد مشاهده: 1448
نویسندگان
Member of academic staff of Islamic Azad University, Hamadan Branch
Associate Professor, Iran University of Science & Technology, Tehran, Iran
چکیده
A viscoelastic analysis of a multilayered composite model is carried out to investigate the timedependent stress transfer between elastic unidirectional Fibers and viscoelastic matrix for loading in the axial direction. The laminate is subjected to an elliptical damaged zone of radii r1 and r2. The stress state in the composite is solved at incremental time intervals to obtain the stabilized solution, and the time required to reach a stable state. To study effect of viscoelasticity on unidirectional composite material used The Wiechert model. It is assumed that all long fibers lie in a finite width laminate. A hexagonal arrangement is postulated to deduce the equilibrium equations. Upon proper use of boundary and boundness conditions, stress and displacement fields are derived within the laminate and as well as elliptic hole surrounding. In order to simulate almost a crack and a circular hole, two values of r1/r2 assume 0 and 1, respectively. The solution is obtained analytically as well as numerically, using finite element technique. The analytical results on stress concentration factors were compared to those of finite element values. A close match is observed between the two methodsکلیدواژه ها
Polymer matrix composite; viscoelasticity; finite element method; analytical solution;Stress concentrationمقالات مرتبط جدید
اطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.