All Outputs (596)

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.

Measurement and prediction of the residual stress field generated by side-punching (2006)
Journal Article

Side-punching is proposed as a method of introducing a well-defined residual stress field into a laboratory-sized test specimen. Such a specimen may subsequently be used to assess the influence of residual stresses on the fracture behavior of materia... Read More about Measurement and prediction of the residual stress field generated by side-punching.

Novel applications of the deep-hole drilling technique for measuring through-thickness residual stress distributions (2006)
Journal Article

This paper presents novel applications of the deep-hole drilling technique for residual stress measurement in components. The results outline the versatility of this technique for application in complex situations such as residual stress measurement... Read More about Novel applications of the deep-hole drilling technique for measuring through-thickness residual stress distributions.

A numerical and experimental investigation into the generation of residual stress in fracture specimens using local compression (2004)
Presentation / Conference Contribution

The influence of residual stresses on the fracture behaviour of materials is of fundamental importance for accurate and reliable structural integrity assessments of components and structures In this paper residual stress fields are introduced into st... Read More about A numerical and experimental investigation into the generation of residual stress in fracture specimens using local compression.

Measurement and prediction of residual stress generated by local compression (2003)
Presentation / Conference Contribution

In order to assess the effect of a residual stress field on the fracture behaviour of materials, a well-defined residual stress field, with known characteristics, such as triaxiality, must be generated in a controllable and reproducible manner. In th... Read More about Measurement and prediction of residual stress generated by local compression.

A finite element simulation and an experimental study of autofrettage for strain hardened thick-walled cylinders (2003)
Journal Article

The effect of the autofrettage process on high pressure cylinders has been investigated. Both numerical and experimental techniques have been used for the investigation. It was observed that the best autofrettage pressure for raising the pressure cap... Read More about A finite element simulation and an experimental study of autofrettage for strain hardened thick-walled cylinders.

Influence of residual stress on the fracture behaviour of an aluminium alloy (2003)
Presentation / Conference Contribution

Influence of residual stresses on fracture response of an Aluminum alloy is investigated. Cylindrical flat ended punching tools are employed to introduce residual stresses on 15mm thick C (T) specimens. The residual stress field resulting from Local... Read More about Influence of residual stress on the fracture behaviour of an aluminium alloy.

Combined effect of residual stress and loading history on brittle fracture (2003)
Presentation / Conference Contribution

The aim of this paper is to examine the influence of residual stress (RS) and loading history on the subsequent low-temperature cleavage fracture resistance of ferritic steel structures such as pressure vessels. Three dimensional finite element analy... Read More about Combined effect of residual stress and loading history on brittle fracture.