A Novel Analytical Solution of the Energy Absorption of Fiber Bridging Zone of Unidirectional Composites under Mixed Mode I/II loading
- سال انتشار: 1395
- محل انتشار: پنجمین کنفرانس بین المللی کامپوزیت
- کد COI اختصاصی: COMPOSIT05_022
- زبان مقاله: انگلیسی
- تعداد مشاهده: 302
نویسندگان
Professor,Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran ۱۶۸۴۶-۱۳۱۱۴, Iran
PhD student, Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, ۱۶۸۴۶-۱۳۱۱۴, Iran
Assistant professor, Faculty of New Sciences and Technologies, University of Tehran, Tehran, ۱۴۳۹۹۵۷۱۳۱, Iran
چکیده
In unidirectional composites, delamination cracks parallel to the reinforcement axis are commonly bridged by fibers. The fiber bridging as a toughening mechanism has an important effect on the behavior of the fracture process zone. Many researchers have qualitatively investigated the fiber bridging effects on the delamination failure phenomenon of unidirectional composites under mixed mode I/II loading. However, due to the complexity, these effects are rarely studied quantitatively. In the present research, an analytical solution is presented which accounts for breakdown of the micro-mechanisms responsible for the load transfer across the bridged delamination cracks. Firstly, different failure micro-mechanisms involved during the fiber bridging phenomenon were identified. Then, suitable boundary and different loading conditions on the bridged fiber were applied. Then, the absorbed energy of each of these failure micro-mechanisms was calculated. Finally, the energy absorbed by the fiber bridging zone was obtained from a summation of these energy terms. The present work deals with arbitrary values of the mode mixitiesکلیدواژه ها
Delamination, Laminated composites, Fiber bridging, Fracture process zone, Mixed mode I/IIمقالات مرتبط جدید
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