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Strength of GRP-laminates withmultiple randomly distributed holes:Use of Percolation Theory
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.
2013 (Swedish)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Due to composite materials are widely used nowadays, it is important to understand manyareas concerning their behaviour that are not completely understood yet.This work focuses on the study of the strength of GRP-laminates with multiple randomlydistributed holes. For this purpose, percolation theory has been used in order totry to predict the normalized strength of laminates as function of only the hole density(the amount of hole area/specimen area).Three dierent laminates have been studied, DBLT800, DBL600 and DBL850, withmany simulations and tensile tests, in order to obtain results with good accuracy. Forsimulations, a suitable model was developed in FE-code ABAQUS in order to get thestrength of every model. For tensile tests, plates were manufactured previously by a vacuumassisted infusion process. Then, the plates were cut, drilled and tested. Once all theresults have been obtained, simulations and experiments were compared in order to knowif the strength obtained was good.These results obtained are very encouraging, showing that percolation theory can beused for predicting the strength of perforated composite plates, and the same curve obtainedmay be used for both DBLT800 and DBL600 laminates with suciently gooddelity.

Place, publisher, year, edition, pages
2013. , 75 p.
Trita-AVE, ISSN 1651-7660 ; 2013:11
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-121511OAI: diva2:618600
Available from: 2013-09-30 Created: 2013-04-29 Last updated: 2013-09-30Bibliographically approved

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