All Outputs (647)

An application of chaboche model to predict uniaxial and multiaxial ratcheting (2011)
Journal Article

Chaboche model can be used to predict the ratcheting phenomenon. The parameter determination of this model to achieve an accurate ratcheting prediction is of great importance. Therefore, the application of an optimization procedure can improve the pr... Read More about An application of chaboche model to predict uniaxial and multiaxial ratcheting.

A neural networks approach to characterize material properties using the spherical indentation test (2011)
Journal Article

Determination of material characteristics using the instrumented indentation test has gained interests among many researchers. The output of a spherical indentation test is usually the load-penetration (P-h) curve. To achieve this goal, the elastic d... Read More about A neural networks approach to characterize material properties using the spherical indentation test.

Proton exchange membrane fuel cell voltage-tracking using artificial neural networks (2011)
Journal Article

Transients in load and consequently in stack current have a significant impact on the performance and durability of fuel cells. The delays in auxiliary equipments in fuel cell systems (such as pumps and heaters) and back pressures degrade system perf... Read More about Proton exchange membrane fuel cell voltage-tracking using artificial neural networks.

J-integral and CMOD for external inclined cracks on autofrettaged cylinders (2011)
Journal Article

Autofrettage is a well-known method to increase the load carrying capacity of the pressure vessels. The autofrettage outcomes can be contrary when the imperfections or material discontinuities are on the outer surface. In this study, the influences o... Read More about J-integral and CMOD for external inclined cracks on autofrettaged cylinders.

Minimum sample size determination for generalized extreme value distribution (2010)
Journal Article

Sample size determination is an important issue in statistical analysis. Obviously, the larger the sample size is, the better the statistical results we have. However, in many areas such as coastal engineering and environmental sciences, it can be ve... Read More about Minimum sample size determination for generalized extreme value distribution.

Effect of gauge volume on the residual stress measurement using deep hole drilling technique (2010)
Presentation / Conference Contribution

Accurate evaluation of residual stress is essential if is to be taken into account in structural integrity assessments. For thick components, many non-destructive residual stress measurement techniques cannot be used since they are unable to measure... Read More about Effect of gauge volume on the residual stress measurement using deep hole drilling technique.

Parameter determination of chaboche kinematic hardening model using a multi objective genetic algorithm (2010)
Journal Article

Chaboche model is a powerful tool to evaluate the cyclic behavior under different loading conditions using kinematic hardening theory. It can also predict the ratcheting phenomenon. To predict the ratcheting, it is required to determine the material... Read More about Parameter determination of chaboche kinematic hardening model using a multi objective genetic algorithm.

Application of deep hole drilling to the measurement and analysis of residual stresses in steel shrink‐fitted assemblies (2010)
Journal Article

Residual stress measurement of shrink-fitted assemblies was achieved through finite element simulations and experiments using the deep hole drilling technique. Shrink-fitted assemblies using stainless steel and cast iron were manufactured and residu... Read More about Application of deep hole drilling to the measurement and analysis of residual stresses in steel shrink‐fitted assemblies.

Application of the modified deep hole drilling technique (iDHD) for measuring near yield non-axisymmetric residual stresses (2010)
Presentation / Conference Contribution

The modified deep hole drilling technique (iDHD) has been developed to allow near yield residual stresses to be measured and has been validated for axisymmetric residual stress fields. In the present investigation, the application of the iDHD techniq... Read More about Application of the modified deep hole drilling technique (iDHD) for measuring near yield non-axisymmetric residual stresses.

PEM fuel cell voltage-tracking using artificial neural network (2010)
Presentation / Conference Contribution

Transients in load and consequently in stack current have a significant impact on the performance and durability of fuel cell. The delay exciting in auxiliary equipments in fuel cell system such as pumps, heaters, back pressures will degrade system p... Read More about PEM fuel cell voltage-tracking using artificial neural network.

Current stabilization in fuel cell/battery hybrid system using fuzzy-based controller (2010)
Presentation / Conference Contribution

In recent years, fuel cells are emerging as main power sources for most applications. These sources have slow dynamic response and should be protected against current impulses. These transients will be harmful to the membrane electrode assembly (MEA)... Read More about Current stabilization in fuel cell/battery hybrid system using fuzzy-based controller.

Conversational gestures in human-robot interaction (2009)
Presentation / Conference Contribution

The human sciences have demonstrated that gesture is a critical element of human communication. While existing graphical solutions are appropriate for virtual agents, solving arm trajectories for physically embodied robots requires that we consider t... Read More about Conversational gestures in human-robot interaction.

Experiments and predictions of the effects of load history on cleavage fracture in steel (2009)
Journal Article

A series of experiments conducted on two steels, A533B and A508, are summarised. Tests were conducted to explore the influence of different room temperature pre-loading cycles on subsequent low temperature (−150 °C and −170 °C) cleavage fracture. In... Read More about Experiments and predictions of the effects of load history on cleavage fracture in steel.

Beat gesture generation rules for human-robot interaction (2009)
Presentation / Conference Contribution

In order for anthropomorphic robots to communicate with people in a human-like way they need to produce gestures along with speech. Beat gestures are a key category of gestures, accompanying emphasis and timing of talk. The standard approach for auto... Read More about Beat gesture generation rules for human-robot interaction.

Residual stress measurement by deep hole drilling and trepanning – analysis with distributed dislocations (2008)
Journal Article

It is shown that the conventional ‘sheet by sheet’ analysis of residual stress measurement by the deep hole drilling method is inaccurate when in-plane stress gradients exist. The influence of the interfacial tractions is analysed by the distributed... Read More about Residual stress measurement by deep hole drilling and trepanning – analysis with distributed dislocations.

A new procedure to measure near yield residual stresses using the deep hole drilling technique (2008)
Journal Article

Mechanical strain relief techniques for estimating the magnitude of residual stress work by measuring strains or displacements when part of the component is machined away. The underlying assumption is that such strain or displacement changes result f... Read More about A new procedure to measure near yield residual stresses using the deep hole drilling technique.

Application of the local approach to predict load history effects in ferritic steels (2008)
Presentation / Conference Contribution

The effect of residual stresses on fracture behaviour of ferritic steels at low temperature has been investigated using a local approach based on the Beremin model [1]. The study aims to enhance the use of local approach in failure prediction when re... Read More about Application of the local approach to predict load history effects in ferritic steels.

Generating well defined residual stresses in laboratory specimens (2008)
Presentation / Conference Contribution

Residual stresses play an important role in increasing and decreasing the possibility of failure. The magnitude and direction of the residual stresses is an important factor in the integrity of engineering structures, including those containing defec... Read More about Generating well defined residual stresses in laboratory specimens.

Using local out-of-plane compression (LOPC) to study the effects of residual stress on apparent fracture toughness (2007)
Journal Article

To study and understand the effects of residual stresses on fracture behaviour, it is necessary to introduce well characterised and reproducible residual stresses into laboratory fracture specimens. One technique capable of providing such residual st... Read More about Using local out-of-plane compression (LOPC) to study the effects of residual stress on apparent fracture toughness.

Accurate measurement of highly triaxial residual stresses (2007)
Presentation / Conference Contribution

Accurate measurement of residual stress is essential if account is to be taken of residual stress in structural integrity assessments. For thick components many non-destructive residual stress measurement techniques cannot be used since they are unab... Read More about Accurate measurement of highly triaxial residual stresses.