37 Result(s)

Article

A generalised three-dimensional tethered-nodule model for auxetic materials

Models for the nano/micro-structural deformation and mechanical properties of auxetic materials (i.e. materials with a negative Poisson’s ratio) have been previously developed. However, most of these models ha...

N. Gaspar, C. W. Smith, A. Alderson, J. N. Grima… in Journal of Materials Science (2011)

Article

Elastic Deformation of Materials under Distributed Shear Loading

In this work, the deformation of material under localised tangential loading has been investigated. An analytical expression to predict deformation and strain patterns under tangential loading over a rectangul...

X. J. Ren, C. W. Smith, K. E. Evans, P. J. Dooling, A. Burgess… in Experimental Mechanics (2010)

Article

Gold-black as IR absorber and solar cell enhancer

Infrared absorbance and visible/near-IR excited plasmon resonances are investigated in gold-black, a porous nano-structured conducting film. Polymer infusion (for hardening) generally reduced absorbance in the...

R. E. Peale, J. W. Cleary, M. Ishigami, C. W. Smith… in MRS Online Proceedings Library (2010)

Article

Physical and thermal effects on the shape memory behaviour of auxetic open cell foams

This study examines the processing envelope related to auxetic open cell foams and their shape memory properties, with the analysis of four different phases of multi-component foams (conventional, 1st auxetic,...

M. Bianchi, F. Scarpa, C. W. Smith, George R. Whittell in Journal of Materials Science (2010)

Article

Negative thermal expansion: a review

Most materials demonstrate an expansion upon heating, however a few are known to contract, i.e. exhibit a negative coefficient of thermal expansivity (NTE). This naturally occurring phenomenon has been shown t...

W. Miller, C. W. Smith, D. S. Mackenzie, K. E. Evans in Journal of Materials Science (2009)

Article

Interpretation of experimental data for Poisson's ratio of highly nonlinear materials

The Poisson's ratio of a material is strictly defined only for small strain linear elastic behavior. In practice, engineering strains are often used to calculate Poisson's ratio in place of the mathematically ...

C. W. Smith, R. J. Wootton, K. E. Evans in Experimental Mechanics (1999)

Article

Temperature and rate effects on stable crack growth in a particulate composite material

In this study, edge cracked sheet specimens made from polybutadiene rubber embedded with hard particles were used in crack propagation tests. Crack propagation tests were conducted under two crosshead speeds (...

C. T. Liu, C. W. Smith in Experimental Mechanics (1996)

Chapter

Near Tip Measurement of Environmental Effects on Opening and Growth of Cracks in Particulate Composites

A series of experiments were conducted at two crosshead rates (2.5. mm/min and 12.7 mm/min) and three temperatures (165°F, 72°F, and −65°F) on edge cracked sheet specimens. The specimens were made from polybut...

C. T. Liu, C. W. Smith in Advanced Technology for Design and Fabrica… (1995)

Article

STM Imaging of Adsorbed Trimethylgallium on GaAs(001)-(2×4)

Scanning tunnelling microscopy (STM) has been used to image the adsorption of trimethylgallium (TMGa) on GaAs(001)-(2×4) surfaces prepared in situ by molecular beam epitaxy (MBE). Filled states images of the clea...

A.R. Avery, A.J. Mayne, C.M. Goringe, J.H.G. Owen… in MRS Online Proceedings Library (1993)

Article

Experiments in three-dimensional fracture problems

Using the established optical methods of frozen stress photoelasticity and moiré interferometry, the author and his colleagues, by introducing some standard refinements, demonstrate how useful information has ...

C. W. Smith in Experimental Mechanics (1993)

Chapter

Stress Intensity Distributions Around Surface Flaws in Motor Grain Geometries

A series of frozen stress photoelastic experiments were conducted on a rocket motor grain geometry containing a natural surface flaw emanating from the tip of the finger of an internal star shaped central hole...

C. W. Smith, L. Wang in Fracture of Engineering Materials and Structures (1991)

Chapter and Conference Paper

Optical Methods of Stress Analysis Applied to Cracked Components

After briefly describing the principles of frozen stress photoelastic and moire interferometric analyses, and the corresponding algorithms for converting optical data from each method into stress intensity fac...

C. W. Smith in Structural Integrity of Aging Airplanes (1991)

Article

Measurement of dominant eigenvalues in cracked body problems

A refined optimal method consisting of the tandem application of frozen stress photoelasticity and high density moire interferometry for studying three dimensional effects in cracked bodies is briefly reviewed...

C. W. Smith, J. S. Epstein, M. Rezvani in International Journal of Fracture (1989)

Article

Analytical and experimental studies of the surface flaw

This paper uses the Newman-Raju model, the Paris crack-growth-rate law and a fixedR ratio to demonstrate the analytical considerations associated with predicting stress-intensity distributions and fatigue crack g...

C. W. Smith in Experimental Mechanics (1988)

Article

On the extraction of stress-intensity factors from near-tip photoelastic data

Existing algorithms and a new algorithm called ‘quadratic’, for extracting stress-intensity factors (SIF) from frozen-stress photoelastic data are evaluated for application to near-tip data in three-dimensiona...

C. W. Smith, O. Olaosebikan in Experimental Mechanics (1986)

Chapter and Conference Paper

A Proposed Rationale for Accounting for Boundary Layer Effects in Designing Against Fracture in Three Dimensional Problems

After briefly reviewing the features of an optical method for measuring boundary layer effects in cracked body problems, results of its application to two problem classes are presented. An interpretation of th...

C. W. Smith, O. Olaosebikan, J. S. Epstein in Time-Dependent Fracture (1985)

Article

Three-dimensional Photoelastic Measurements with Very Thin Slices

J. S. Epstein, D. Post, C. W. Smith in Experimental Techniques (1984)

Article

Use of mixed-mode stress-intensity algorithms for photoelastic data

A generalization of irwin's method and a new algorithm, called ‘quadratic,’ are proposed for the extraction of mixed-mode stress-intensity factors (SIF) in three-dimensional cracked-body problems. These new al...

C. W. Smith, O. Olaosebikan in Experimental Mechanics (1984)