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Displaying 751 - 775 of 925

E-Glass/DGEBA/m-PDA Single Fiber Composites: Interface Debonding During Fiber Fracture

October 1, 2007

Author(s)

Gale A. Holmes, R C. Peterson, Donald L. Hunston, Walter G. McDonough

In this paper, we examine the regions of debonding between the fibers and the matrix surrounding fiber breaks formed during single-fiber fragmentation tests. The materials used were E-glass fibers embedded in a matrix of diglycidyl ether of bisphenol-A

Feasibility of Using a Concrete Mixing Truck as a Rheometer(Orlando, Florida)

September 19, 2007

Author(s)

Chiara F. Ferraris, Roy Cooley, Joe Grein, Max A. Peltz, Michael Topputo, Steve Verdino

The goal of the tests reported here was to further determine the feasibility of using a concrete mixing truck as a rotational rheometer. This work is the continuation of preliminary tests [ , ] that seemed to indicated that the yield stress and the plastic

AN ANALYSIS PROCEDURE FOR QUANTIFYING THE FRAGMENTATION BEHAVIOR OF 2-D MULTI-FIBER ARRAYS

May 24, 2007

Author(s)

Jae Hyun Kim, Walter G. McDonough, Gale A. Holmes

Prediction of Elastic Properties of Heterogeneous Materials With Complex Microstructures

January 1, 2007

Author(s)

Yong Ni, Martin Chiang

A homogenization method combining the Eshelby equivalent eigenstrain approach and the phase-field microelasticity for numerically solving the eigenstrain, is developed to predict all the effective elastic constants of three-dimensional heterogeneous

Measuring the Mechanical Properties of Nanocomposites: Potential Complications From the Mullins Effect

September 20, 2006

Author(s)

Christopher C. White, Donald L. Hunston

Quantification of mechanical properties, such as non-linear viscoelastic behavior, for filled elastomers (model nanocomposites) is complicated by the presence of the Mullins effect. This paper examines the potential complications due to the Mullins effect

Feasibility on Using a Concrete Mixing Truck as a Rheometer

June 14, 2006

Author(s)

S Amziane, Chiara C. Ferraris, E Koehler

Fresh concrete properties are crucial for the performance of the concrete in its hardened state. The measurement of workability is usually done using a simple slump test. This test, although widely used for almost 100 years, does not provide a full picture

Polymerization Shrinkage And Stress Development In Bioactive Urethane Acrylic Resin Composites

January 1, 2006

Author(s)

Joseph M. Antonucci, Tonya Icenogle, W F. Regnault, D W. Liu, J N. O'Donnell, Drago Skrtic

Moisture Diffusion and Temperature History Models for Thin Organic Coatings Exposed to Ambient Air

September 20, 2005

Author(s)

William C. Thomas, Christopher C. White, Mark R. VanLandingham

Baseline models are developed for predicting moisture concentration and temperature in extremely thin polymeric films bonded to impermeable substrate materials. These simplified models are based on analytical rather than numerical solutions to circumvent

Viscoelastic Characterization of Polymers Using Instrumented Indentation I. Quasi-static Testing

July 13, 2005

Author(s)

Mark R. VanLandingham, N-K Chang, P L. Drzal, Christopher C. White, S-H Chang

The use of instrumented indentation to characterize the mechanical response of polymeric materials was studied. A model based on contact between a rigid probe and a linear viscoelastic material was used to calculate values for creep compliance and stress

Viscoelastic Characterization of Polymers Using Instrumented Indentation II. Dynamic Testing

July 13, 2005

Author(s)

Christopher C. White, Mark R. VanLandingham, P L. Drzal, N-K Chang, S-H Chang

Dynamic nanoindentation was preformed on a cured epoxy, poly(methyl methacrylate), and poly(dimethyl siloxane) or PDMS. These samples, two glassy polymers and a rubbery material are used to illustrate the agreement between classical rheological

Influence of Experimental Set-Up and Plastic Deformation on the Shaft-Loaded Blister Test

May 11, 2005

Author(s)

S Goldfarb, E P. O'Brien, Christopher C. White

The effect of film thickness, substrate hole diameter, and shaft tip diameter on the applied strain energy release rate, G, of a thin film was measured using the shaft-loaded blister test. Test specimens consisted of plies of Kapton pressure sensitive

Assessment of the Role of Filler Size in Amorphous Calcium Phosphate Filled Methacrylate Dental Composites (Poster)

April 1, 2005

Author(s)

Joseph M. Antonucci, Drago Skrtic

The goal of this study was to assess the effects of the ACP s filler particle size on the physicochemical and mechanical properties of EBPADMA-based composites. The experimental resin was formulated from the commercially available monomers: EBPADMA, tri

Prediction and Three-Dimensional Monte-Carlo Simulation for Tensile Properties of Unidirectional Hybrid Composites

April 1, 2005

Author(s)

Martin Y. Chiang, Xianfeng Wang, Carl R. Schultesiz

A three-dimensional fiber tow-based analytical model incorporating shear-lag theory and a statistical strength distribution has been used to simulate the tensile properties and predict the tensile strength of unidirectional hybrid composites. The hybrid

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