The effect of mesostructure heterogenity on the cracks initiation and the displacement distribution in NCF composites
2012 (English)In: 6th EEIGM International Conference Advanced Materials Research: 7th and 8th November, 2011 EEIGM, Nancy, France, IOP Publishing Ltd , 2012, Art no 012023- p.Conference paper (Refereed)
Non Crimp Fabrics (NCF) are promising new generation composite materials. They are now being used in some sections of composite industry, for example in wind turbine blades and boat hulls. The aerospace industry also shows an increasing interest in this material, thanks to the low cost of its manufacturing process. NCFs are special types of textile composites, made of layers of parallel fiber bundles oriented in different directions and separated by resin. Due to the manufacturing process the fiber bundles are not perfectly straight. They show a certain degree of waviness which decreases the stiffness and the strength of the material. The heterogeneous mesostructure affects the mechanical properties of the material and the failure mechanisms. This was studied using both numerical and experimental methods. In our experimental approach, a carbon fiber/epoxy resin laminate with uniform fiber distribution was manufactured by voluntarily introducing waviness to simulate the NCF composites. The displacement map was studied against the thickness of a sample loaded in tension, using ESPI (Electronic Speckle Pattern Interferometry). This can give us a primary idea of the micro damage initiation and the cracks' shapes.
Place, publisher, year, edition, pages
IOP Publishing Ltd , 2012. Art no 012023- p.
, I O P Conference Series: Materials Science and Engineering, ISSN 1757-8981 ; 31
Research subject Polymeric Composite Materials
IdentifiersURN: urn:nbn:se:ltu:diva-29625DOI: 10.1088/1757-899X/31/1/012023Local ID: 329e509d-e8ff-45e1-890a-ef4cd8247195OAI: oai:DiVA.org:ltu-29625DiVA: diva2:1002849
EEIGM International Conference on Advanced Materials Research : 11/06/2015 - 12/06/2015
Validerad; 2012; 20111206 (ysko)2016-09-302016-09-30Bibliographically approved