A5065991883- High Temperature Alloys and Creep
- Metallurgy and Material Forming
- Aluminum Alloy Microstructure Properties
- Fatigue and fracture mechanics
- Spinal Cord Injury Research
- Innovations in Medical Education
- Microstructure and mechanical properties
- Metal Alloys Wear and Properties
- Stroke Rehabilitation and Recovery
- Microstructure and Mechanical Properties of Steels
- Advanced Surface Polishing Techniques
- Clinical Reasoning and Diagnostic Skills
- Cerebral Palsy and Movement Disorders
- Physical Activity and Health
- Aluminum Alloys Composites Properties
- Probabilistic and Robust Engineering Design
- Powder Metallurgy Techniques and Materials
- Intermetallics and Advanced Alloy Properties
- Obesity, Physical Activity, Diet
- Materials Engineering and Processing
- Reflective Practices in Education
- Empathy and Medical Education
- Integrated Circuits and Semiconductor Failure Analysis
- Material Properties and Failure Mechanisms
- Educational Assessment and Improvement
University of Cape Town
2016-2023
Cape Peninsula University of Technology
2021
Stellenbosch University
2021
City of Cape Town
2021
National Research Foundation
2021
Foundation for Physical Medicine and Rehabilitation
2021
Royal Derby Hospital
2019
International Federation of Sports Medicine
2019
Brunel University of London
2014
Cranfield University
2009
AbstractAbstractThe paper investigates the use of hot axisymmetric compression test for determination working properties alloys. Qualitative analysis shows that stress determinations from are subject to systematic errors. These arise frictional effects and deformation heating. The errors affected by conditions these parameters have been investigated using a fully coupled finite element procedure. Specimen geometry, specimen volume, friction, temperature, strain rate, investigated. Procedures...
This paper describes good practice for the measurement of hot flow stress in metallic materials. It is applicable to (isothermal) uniaxial axisymmetric compression tests at medium high rates strain (10−4–102 s−1) deformation temperatures below solidus.Guidance provided on appropriate testpiece geometries and methods verifying temperature distribution along length testpiece. Flow diagrams are given showing all steps that necessary, including correction factors need be applied deformational...
Description de l'etat actuel du developpement procede Osprey production d'ebauches, permettant d'obtenir, directement a partir bain, des ebauches denses par projection et depot. Preparation d'un certain nombre d'alliages, comprenant superalliages base Ni, ayant proprietes mecaniques aussi bonnes que celles alliages obtenus techniques plus classiques
The efficacy of video recording in transmitting clinical knowledge and skills to medical students was tested by on videotape demonstrations physical examinations given five clinicians a randomly selected group 12 (personal group) from the first year then showing these recordings, under identical conditions, 13 same (video group). both personal mediums terms whether content retained questionnaire completed all at end sessions structured assessment which were asked demonstrate some tasks three...
The θ projection method is a procedure for the interpolation and extrapolation of creep properties. It works by describing shape conventional curves suitable mathematical functions then projecting those to different stresses temperatures. involves techniques collection data that enable large amounts information be summarized this paper explores possibility information–rich can extended give constitutive relationship component analysis. A general framework involving variety hardening,...
A new concept in solidification and casting technology is outlined which relates powder metallurgy, spray forming, conventional casting. It shown that incremental can he used to make products having enhanced properties. Rapid solidification, very low porosity, zero segregation, fine grain size, uniform distribution of a second phase be accomplished various combinations though, regrettably, not all together. terminology appropriate the has been developed together with certain definitions....
AbstractAbstractThe prediction of long term creep properties from short tests is discussed in terms the θ projection method. The method has been shown to yield reasonable extrapolation functions and present paper investigates characterisation scatter procedures required give estimates variability predictions. nature errors individual curves multiple obtained various specimens under differing test conditions are formulae developed that allow an assessment reliability derived parameters. These...
AbstractAbstractA semi-industrial scale rolled bar of the creep resistant Ni base superalloy designed in Parts 1 and 2 has been fabricated. The influence heat treatment on microstructure phase formation investigated using both optical electron microscopy, X-ray diffraction. Mechanical properties at ambient high temperature have measured by hardness testing, compression tensile testing. These experimental results are good agreement with predictions concerning formation, yield stress rupture...
The aim of the study was to determine whether 24 wks robotic locomotor training or activity-based sufficient time induce bone mineral density and body composition changes in individuals with spinal cord injury. This reports secondary analysis a randomized pilot trial.Participants chronic motor incomplete tetraplegia ( N = 16) were recruited. Interventions involved 60-min sessions, 3× per week, over wks. Robotic walking Ekso GT suit. Activity-based combination resistance, cardiovascular,...
The prevention and treatment of secondary complications is a key priority for people with spinal cord injury fundamental goal rehabilitation. Activity-based Training (ABT) Robotic Locomotor (RLT) demonstrate promising results reducing associated SCI. However, there need increased evidence through randomized controlled trials. Therefore, we aimed to investigate the effect RLT ABT interventions on pain, spasticity, quality life in individuals injuries.Participants chronic motor incomplete...
The small disc creep test is described. curves observed need to be related the properties of material obtained by conventional testing. This relationship should include a means assessing damage which initially present in and therefore an estimate remanent life. There are difficulties with such correlations these shown imperfect understanding complex nature punch test. can improved suitable physical modelling deformation occurring. paper describes finite element model verifies against...
Twenty-five years ago, Uwe Reinhardt pointed out that sheer bureaucratic waste, particularly in the private sector, accounted for much of extraordinarily high cost American health-care. Last year an expert panel Institute Medicine reconfirmed his point, estimating 2009, administrative waste $190 billion a total $765 various forms waste--31% overall spending on healthcare. recently noted peculiar schizophrenia among economists, simultaneously deploring this monumental while celebrating...
Background: Noncommunicable diseases (NCDs) are increasingly prevalent within South Africa. Physical inactivity is a significant, independent and modifiable risk factor increasing the prevalence of NCDs.Discussion: The integration physical activity programmes into primary health care system through multidisciplinary platforms thus advocated for envisioned to be more cost-effective than current practices. However, currently setting Africa, there an absence professionals adequately equipped...