نتایج جستجو برای: glasscarbon hybrid composites

تعداد نتایج: 234064  

2013
Bo Jin Wenning Liu Hemant Patel Steven Nutt

[Abstract] MSC NASTRAN User Defined Services (UDS) and PATRAN were applied to perform load-displacement analysis of ACCC, a new type of power cable with hybrid composites reinforced core. PATRAN was used to model the geometry of the hybrid composites core, and MSC NASTRAN was implemented to analyze the load-displacement behavior of the structure. MSC NASTRAN UDS subroutine UMAT was used to prov...

2016
Praveen Kumar

During the past few decades, materials design has shifted emphasis to pursue low cost, quality, light weight, environment friendliness, and performance. Aluminium matrix composites are important class of engineering materials used in aerospace, automotive, engineering, defence and other industries because of their lower density, higher specific strength, and better physical and mechanical prope...

Journal: :Journal of oral science 2008
Toshiki Takamizawa Akira Yamamoto Naoki Inoue Akimasa Tsujimoto Tatsuki Oto Atsushi Irokawa Keishi Tsubota Masashi Miyazaki

The purpose of this study was to evaluate the influence of power density on contraction stress of resin composite restorative materials during photo-polymerization. Six flowable resin composites, and a hybrid resin composite for comparison, were used. The composites were polymerized with the power density adjusted to either 100 or 600 mW/cm(2). Stress development was determined with a custom-ma...

Journal: :Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] 2009
Nesrin Eronat Umit Candan Murat Türkün

STATEMENT OF THE PROBLEM In stress-bearing cavities, low fracture resistance adversely affects the longevity of the dental resin composite restorations. PURPOSE The aim of this in vitro study was to investigate the effect of glass fiber layering on the flexural strength of microfill and hybrid composites. MATERIALS AND METHODS Flexural test specimens (N = 75) were prepared according to Inte...

2016
Fan Cheng Pengbo Lu Pengfei Ren Jinbo Chen Yanghao Ou Meiyan Lin Detao Liu

Sustainability and eco-efficiency are presently directing the development of the next generation of acoustic materials. In this work, foamed cellulosepolymer microsphere (PM) hybrid materials, having sound-absorbing capability, were prepared by incorporating the PMs into cellulose fibers by dehydration and foaming processes. The evolution in morphology of PMs during foaming process was investig...

2014
Linxiang He Sie-Chin Tjong

Polyvinylidene fluoride (PVDF) composites filled with in situ thermally reduced graphene oxide (TRG) and silver nanowire (AgNW) were prepared using solution mixing followed by coagulation and thermal hot pressing. Binary TRG/PVDF nanocomposites exhibited small percolation threshold of 0.12 vol % and low electrical conductivity of approximately 10(-7) S/cm. Hybridization of TRGs with AgNWs led t...

Journal: :Dental materials : official publication of the Academy of Dental Materials 2003
H H K Xu G E Schumacher F C Eichmiller R C Peterson J M Antonucci H J Mueller

OBJECTIVES Direct-filling resin composites are used in relatively small restorations and are not recommended for large restorations with severe occlusal-stresses. The aim of this study was to reinforce composites with fiber preforms, and to investigate the effects of layer thickness and configurations on composite properties. It was hypothesized that fiber preforms would significantly increase ...

Journal: :Journal of hazardous materials 2011
H Hadjar B Hamdi C O Ania

Hybrid inorganic/organic adsorbents were synthesized using mixtures of diatomite and carbon charcoal as precursors, and explored for the removal of p-cresol from aqueous solution. The carbon/diatomite composites displayed a bimodal and interconnected porous structure which was partially inherited from both precursors. They display moderate surface areas (between 100 and 400 m(2)g(-1)) due to th...

Using natural hemp fibers to reinforce the tensile characteristics of polymer matrix composites is investigated in this article. The fibers were applied to the epoxy matrix in unidirectional and hybrid tissue forms. After preparation of standard tensile stress test specimens via manual layup, the standard tensile test was done.  Young’s modulus, ultimate tensile stress, and the amount of absorb...

دانش کاظمی, علیرضا, داوری, عبدالرحیم, مشتاق, ساجده, موسوی نسب, سیدمجید,

Introduction: One of the most important factors affecting the marginal seal of composite restorations is polymerization shrinkage. The aim of this study was to evaluate the micro leakage of two resin composites cured with two light directions. Methods: In this experimental study, forty similar class III preparations were prepared in 40 human anterior teeth. The teeth were randomly divided in t...

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