RETRACTED: Material property characterization of glass and carbon/vinyl ester composites

Swaminathan, Gowthaman; Shivakumar, Kunigal; Sharpe, Mathew

doi:10.1016/j.compscitech.2005.09.008

Cited by 13 publications

(6 citation statements)

References 8 publications

(11 reference statements)

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“…5. This phenomenon has been reported that the boundary condition of failure mode is depending not only on the fiber content but also on the geometry of preform in the composite [12,13].…”

Section: Resultsmentioning

confidence: 78%

“…On the other hand, further increment of the wrinkled and overlapped lengths within L W > L CW and L O > L CO , the fiber/matrix interface of the discontinuous regions became strong enough without the debonding. Then, the failure was either the breaking/buckling fibers at the discontinuous fabric and 7c, due to the high stress concentrations [9,13]. The fibers could achieve their potential strengths and the composite failure was controlled by the fibers for the second phase.…”

Section: Resultsmentioning

confidence: 99%

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Failure of Composites with Discontinuous Fabric Preform under Bending

Trung

Lee

2011

KEM

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During the fabric preform and/or mold closure processes of the resin transfer molded composites (RTMCs), the discontinuous fabric patterns such as wrinkling and overlapping can be occurred and influenced the failure strength. It is found that the composites with discontinuous fabric preform had two failure mechanisms as functions of fabric ply number and discontinuous fabric length under the three-point bending. First, the failure modes can be related to the bend strengths that were controlled by the interfacial bonding strength depending on the discontinuous fabric length. Second, the failures were controlled by the potential strength of fabric when the discontinuous length reached the critical value. Moreover, the experimentally measured results of the normal and discontinuous preform models under bending were compared to examine the safety conditions as functions of fiber content and other factors.

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“…5. This phenomenon has been reported that the boundary condition of failure mode is depending not only on the fiber content but also on the geometry of preform in the composite [12,13].…”

Section: Resultsmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Failure of Composites with Discontinuous Fabric Preform under Bending

Trung

Lee

2011

KEM

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“…The mechanical properties of fiber-reinforced plastics materials have been widely studied for several matrix and fiber materials; studies have focused on the characterization of processing and mechanical properties [7,8]. Using the threepoint bending test, Hobbiebrunken [9] investigated interfacial failure on the basis of experimental and numerical results.…”

Section: Introductionmentioning

confidence: 99%

Analysis of tensile properties for composites with wrinkled fabric

Trung

Lee

2010

J Mech Sci Technol

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During the fiber preform loading process of resin transfer moldings (RTMs), fabric layers can be wrinkled in the preform, which affects the quality of the composite. This study considers several wrinkled models with different wrinkled lengths (L W ) and different numbers of wrinkled layers in the preform. To study the effects of wrinkling on tensile properties, two matrix materials with different moduli are used to enhance understanding. It is found that the tensile moduli of wrinkled models are lower than those of the normal model, for the same fiber volume fraction (V f ). The effects of wrinkling on the tensile modulus increase with the number of layers as well as V f . In addition, the effect of wrinkling with a low-modulus matrix on the tensile modulus is larger than that with a high-modulus matrix in the composite. Based on the failure modes and the stiffness of materials, the failure mechanisms of wrinkled models can be separated into two regimes as a function of wrinkled length, L W , depending on the critical wrinkled length (L WC ).

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“…W ciągu ostatnich kilku lat naukowcy podjęli się poprawy właściwości użytkowych i wytwarzania kompozytów wykorzystywanych w technologii szybkiego prototypowania. Kompozyty polimerowe, ze względu na łatwość ich formowania oraz znacznie lepszą sztywność i odporność na uderzenia, są szeroko stosowane w wielu gałęziach przemysłu i ich wykorzystanie stale rośnie [8][9][10][11][12]. Kompozyt hybrydowy o zoptymalizowanym składzie, dzięki połączeniu zalet komponentów, pozwala wyeliminować lub zminimalizować wady, które pojawiają się, gdy używane są polimery niemodyfikowane.…”

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Zastosowanie metody vacuum casting do wytwarzania prototypów badawczych polimerowych kół zębatych

Oliwa

Oleksy

Heneczkowski

et al. 2021

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Przeprowadzono badania dotyczące wykorzystania nanokompozytów na osnowie dwuskładnikowych żywic poliuretanowych typu RenPIM-VG 5286 (PUR) z dodatkiem nanonapełniaczy: Nanobent® ZR1 i ZR2, modyfikowanych oktakis(tetrametyloamonio)oktasilseskwioksanem i oktakis{3-[N-(hydroksyetylo)dimetyloamino]propylo}oktasilseskwioksanem w technologii vacuum casting (VC). Zbadano reaktywność kompozycji odlewniczych (czas żelowania i maksymalną temperaturę utwardzania) oraz właściwości tiksotropowe, które mają istotny wpływ na przebieg procesu technologicznego wytwarzania prototypów kół zębatych w matrycach silikonowych. Oznaczono także wpływ rodzaju nanonapełniacza na właściwości użytkowe uzyskanych kompozytów. Wykazano, że dzięki wprowadzeniu układu hybrydowych napełniaczy, uzyskano ograniczenie skurczu promieniowego i osiowego, co dało radykalną poprawę dokładności wymiarowej odlewanych kół zębatych.

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RETRACTED: Material property characterization of glass and carbon/vinyl ester composites

Cited by 13 publications

References 8 publications

Failure of Composites with Discontinuous Fabric Preform under Bending

Failure of Composites with Discontinuous Fabric Preform under Bending

Analysis of tensile properties for composites with wrinkled fabric

Zastosowanie metody vacuum casting do wytwarzania prototypów badawczych polimerowych kół zębatych

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