Cyclic fatigue of polymer nanocomposites

Wang, Gong‐Tao; Liu, Hong-Yuan; Saintier, Nicolas; Mai, Yiu‐Wing

doi:10.1016/j.engfailanal.2009.04.022

Cited by 62 publications

(43 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[22]). Following the sequential ion-milling approach [15,23], a series of epoxy micropillars were carved out on the mechanically polished surface of the bulk epoxy sample using the FIB technique on a Quanta 200 3D FIB/SEM Dual-Beam TM System (FEI Company, Hillsboro, OR, USA).…”

Section: Materials and Experimentsmentioning

confidence: 93%

Size effect in microcompression of epoxy micropillars

et al. 2012

View full text Add to dashboard Cite

Understanding the size effect on the mechanical properties of polymers is of great importance for a robust design of today's polymer-based micro-devices. In this article, we propose the microcompression approach based on the focused ion beam milling technique to probe the possible size effect on the mechanical behavior of epoxy micropillars. By systematically reducing their size from the micrometer to submicron scale, these micropillars display a constant elastic modulus in their inner cores while exhibit an increasing yield and fracture strengths with decreasing diameters. Such a size effect is attributed to the intrinsic material heterogeneity at the submicron scale and the presence of a nano-scale stiff surface layer wrapping around the micropillars. This study provides a theoretical framework for the microcompression analysis of polymerbased micropillars, paving the way for future study of a variety of polymer-based advanced material systems by microcompression.

show abstract

Section: Materials and Experimentsmentioning

confidence: 93%

Size effect in microcompression of epoxy micropillars

et al. 2012

View full text Add to dashboard Cite

show abstract

“…The cyclic fatigue properties of a piperidine-cured DGEBA was studied by Mai et al 12 They found a fatigue life improvement of 145% with 2 wt % nanosilica, an even slightly higher improvement at 6 wt % nanosilica, but only a 56% improvement at 10 wt % nanosilica. Apparently, there is no linear relationship between the silica content and increased fatigue performance, but a maximum seems to exist at a certain addition level.…”

Section: Amine-cured Epoxy Resinsmentioning

confidence: 99%

Epoxy resin composites with surface‐modified silicon dioxide nanoparticles: A review

Sprenger

2013

J of Applied Polymer Sci

150

View full text Add to dashboard Cite

Surface-modified silica nanoparticles, 20 nm in size and with a very narrow particle size distribution, have been available as concentrates in epoxy resins in industrial quantities for the last 10 years. They can be used in epoxy resin formulations to improve many different properties, including the strength, modulus, toughness, and fatigue performance. In this review, I examine the literature published in the last decade, compare the results with a focus on the mechanical properties, and discuss the mechanisms responsible for property improvements.

show abstract

“…The energy absorption mechanisms of rubber particle cavitation and the associated plastic deformation of the surrounding epoxy have been attributed to such improved fatigue performance. Similarly, epoxy containing silica nanoparticles has been shown to exhibit improved fatigue life [15,16] and reduced FCGR [17]. The creation of nanovoids by the debonding of hard silica particles and the subsequent void growth has been shown to absorb energy and thereby increase the fatigue life.…”

Section: Introductionmentioning

confidence: 99%

Enhanced fatigue behavior of a glass fiber reinforced hybrid particles modified epoxy nanocomposite under WISPERX spectrum load sequence

Manjunatha

Bojja

Jagannathan

et al. 2013

International Journal of Fatigue

View full text Add to dashboard Cite

Two types of glass fiber reinforced plastic (GFRP) composites were fabricated viz., GFRP with neat epoxy matrix (GFRP-neat) and GFRP with hybrid modified epoxy matrix (GFRP-hybrid) containing 9 wt. % of rubber microparticles and 10 wt. % of silica nanoparticles. Fatigue tests were conducted on both the composites under the WISPERX load sequence. The fatigue life of the GFRP-hybrid composite was about 4-5 times higher than that of the GFRP-neat composite. The underlying mechanisms for improved fatigue performance are discussed. A reasonably good correlation was observed between the experimental fatigue life and the fatigue life predicted under the spectrum loads.Keywords: glass fiber composite, silica nanoparticle, rubber particle, spectrum fatigue. * Corresponding author: Tel. +91-80-2508 6310; Fax: +91-80-2508 6301 E-mail address: manjucm@nal.res.in (CM Manjunatha) 2 INTRODUCTIONDue mainly to their high specific strength and stiffness, continuous fiber reinforced plastic (FRP) composites are widely used in various structural applications such as airframes, wind turbines, ship hulls, etc. Such composite structural components experience variable amplitude or spectrum fatigue loads in service. Hence, the fatiguedurability of the composite materials under spectrum loads is an important requirement in these applications.Engineering polymer matrix composite materials generally consist of continuous glass or carbon fibers embedded in a thermosetting epoxy polymer. The epoxy polymer, being an amorphous and highly cross-linked material, is relatively brittle and exhibits a relatively poor resistance to crack initiation and growth, thus affecting the overall mechanical properties, including the fatigue and fracture behavior of FRP composites.One of the ways to improve the mechanical properties of FRPs is to add a second phase of fillers into the epoxy matrix.Incorporation of various types of micro-and nano-sized spherical, fibrous and layered fillers into the epoxy has been shown to improve the mechanical properties of composites [1][2][3]. Considerable improvements in the strength and stiffness [4], and dramatic improvements in the fracture toughness [3][4][5] EXPERIMENTAL Materials and ProcessingThe materials used and the processing employed to manufacture GFRP composites are briefly explained in this section. However, a detailed description of the materials and processing can be found in [24]. The epoxy resin used was LY556 from Huntsman, which is a diglycidyl ether of bisphenol A (DGEBA) resin. The silica (SiO 2 )nanoparticles were obtained as a colloidal silica sol with a concentration of 40 wt.% in LY556 from Nanoresins. The reactive liquid rubber was a carboxyl-terminated butadiene-acrylonitrile (CTBN) rubber, obtained from Nanoresins as a 40 wt.% CTBN-LY556 epoxy adduct. The curing agent was an accelerated methylhexahydrophthalic acid anhydride, HE600 from Nanoresins. The E-glass fiber cloth was a non-crimp-fabric (NCF) with an areal weight of 450 g/m 2 .The required quantity of the neat epoxy resin, th...

show abstract

Cyclic fatigue of polymer nanocomposites

Cited by 62 publications

References 16 publications

Size effect in microcompression of epoxy micropillars

Size effect in microcompression of epoxy micropillars

Epoxy resin composites with surface‐modified silicon dioxide nanoparticles: A review

Enhanced fatigue behavior of a glass fiber reinforced hybrid particles modified epoxy nanocomposite under WISPERX spectrum load sequence

Contact Info

Product

Resources

About