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عنوان فارسی مقاله:
سفتی اینترلامینار انتقال رزین ورقه توسط ساختارهای پلی الکتروریسی تولیدات: اثر مورفولوژی جایگذاری
عنوان انگلیسی مقاله:
Interlaminar toughening of resin transfer molded laminates by electrospun polycaprolactone structures: Effect of the interleave morphology
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Delamination and brittle matrix fracture have long been a problem of fiber reinforced composites. They are usually due to Mode I and Mode II loading conditions of cracks which are frequently encountered during realistic loading conditions such as impact or fatigue. Recently, the use of electrospun nanofibers has been proposed to toughen composites and prevent such delaminations. A relatively diverse set of polymer nanofibers has been studied in literature for the interlaminar toughening of epoxy composites. Examples include polysulfones (PSU), poly(ether ether ketone cardo) (PEK-C), poly(ε-caprolactone) (PCL), polyamides (PA), poly(vinylidene fluoride) (PVDF), polyacrylonitrile (PAN), polyamide-imide (PAI), poly(styrene-co-glycidyl methacrylate), and polyvinyl butyral (PVB) [1e12]. Such nanofibrous nonwovens can easily be placed between two reinforcing plies prior to composite production and result in a fine distribution of the nanoscaled phases of the chosen polymer in the surrounding epoxy phase. Hence, there is no need to disperse them into the resin as opposed to traditional toughening methods, which often involve mixing reactive rubbers or thermoplastic materials in the epoxy resin (followed by phase separation during curing) [13] or the more recently applied (functionalized) nanoparticles [14e17]. This is a major advantage for infusion applications, since mixing in anyparticle or thermoplastic material generally causes a large increase in viscosity. It is well known that for thermoplastic and rubber toughening by phase separation, the final phase separated morphology of the thermoplastic/rubber phase has a major influence on the fracture toughness of the epoxy matrix [18e20]. As such also the morphology of the electrospun structure might affect the interlaminar fracture toughness of nanofiber toughened laminates. In the present paper, we will investigate this effect by interleaving different electrospun PCL structures into resin transfer molded glass epoxy laminates to increase their fracture toughness. The study of PCL is especially relevant since some of the highest increases in interlaminar fracture toughness have been obtained using PCL nanofibers [6,21,22]. Both the Mode I as well as the Mode II fracture toughness of five different electrospun morphologies, i.e. nanofibers, microfibers, microspheres, films and spray coated PCL, are evaluated. Throughout this paper special emphasis will be given to analyzing the effect of the electrospun morphology on the interlaminar crack path. Since recent work by the authors showed that in a nanofiber interleaved composite laminate, the macroscopic crack path of the delamination can be influenced by numerous parameters such as the delamination mode, the nano- fibrous veil areal density, reinforcing ply architecture, the interleaving method and mechanical properties of the nanofibers [23]. Hence, extensive microcopy analysis of the interlaminar crack path will provide better insight in the micromechanical fracture mechanisms behind the observed interlaminar fracture toughness.
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کلمات کلیدی:
Resin Transfer Moulding for Aerospace Structures https://books.google.com/books?isbn=9401144370 T. Kruckenberg, R. Paton - 2012 - Technology & Engineering Advani, S. G. (1996) Fundamentals of flow modeling in resin transfer modeling. ... M. (1988) Modelization of the clamping force and mold filling in resin transfer ... intra- and inter-laminar resin content on the mechanical properties of toughened ... Damage-Resistant Composites Using Electrospun Nanofibers: A ... pubs.acs.org/doi/full/10.1021/acsami.6b02247 by L Daelemans - 2016 - Cited by 7 - Related articles Apr 18, 2016 - Nanofiber-toughened composites are novel for their superior performance ... Two types of nanofibers were selected as model systems, polyamide ...... K.Interlaminar Toughening of Resin Transfer Moulded Glass Fibre Epoxy ... Human Biomaterials Applications - Page 234 - Google Books Result https://books.google.com/books?isbn=147572487X Donald L. Wise, Debra J. Trantolo, David E. Altobelli - 2013 - Technology & Engineering The reinforcement was impregnated with resin and pulled through a PVC hose to squeeze off the excess resin before being heat cured in a mold. ... The matrix consists of a toughened epoxy resin that possesses high interlaminar ... the aligned fiber reinforcement but, more important, of transferring stress directly onto them. Fiber Reinforced Polymer (FRP) Composites for Infrastructure ... https://books.google.com/books?isbn=9400723563 Ravi Jain, Luke Lee - 2012 - Business & Economics The interlaminar shear strength decreased for longer aging times, but showed little ... The model was shown to be able to predict the onset and growth of the ... were manufactured using Vacuum Assisted Resin Transfer Molding (VARTM). ... a two component toughened epoxy resin supplied by Applied Poleramic Inc., USA. EFFECTS OF INTRA- AND INTER-LAMINAR RESIN CONTENT ON ... https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930021656.pdf by DH Grande - 1991 - Cited by 6 - Related articles Composite materials having multiphase toughened matrix systems and laminate ... characterized by resin rich interlaminar layers (RIL) have been the subject of ... tape structures and the cured matrix distributions in resin transfer molded parts.
