This research group focuses on developing techniques for the design, analysis and simulation of machines, mobile structures and pressure vessels. The group is active in the areas of pressure vessels for both low and high pressures, plastic gearing, nuclear components and piping, mechanisms and mechanics, dynamic machinery, and design using computer graphics. Fundamental work is carried out in plasticity theory and its application to bifurcation problems in manufacturing.
The group is also involved in basic research in kinematics, dynamics and control of flexible robot arms, and in Tribology - the study of friction, lubrication and wear. Extensive laboratory simulations, testing and non-destructive inspection are used to study failure modes and design improvements. These studies are supported by the development of analysis techniques in computer aided design, simulation techniques, finite element methods, failure analysis, plasticity, and continuum mechanics.
Dr. Chandrashekar’s research is focused on musculoskeletal biomechanics in general and knee biomechanics in particular. The research involves studying the causes and prevention of knee ligament injuries through a novel hybrid in-vivo/computational/in-vitro approach. The research also involves studying the effects of biomedical devices such as knee braces and developing new knee braces to attenuate knee pain due to osteoarthritis.
Areas of Expertise
Musculoskeletal biomechanics, biomechanical simulation, computational biomechanics and biomedical devices.
Structural Biomechanics Lab
The lab has facilities to test the mechanical properties of tissues including loading apparatus, various load sensors, displacement sensors and contact sensors. It also has dissection facilities and tissue storage facility. It houses the unique dynamic knee simulator system to simulate dynamic movement on cadaver knees and measure tissue strain and contact forces simlultaneously. The lab also consists facilities to develop knee braces and perform computational analysis (finite element analysis) on biological and non-biological systems.
- Centre for Bioengineering and Biotechnology (CBB)
- Department of Orthopaedic Surgery, University of Toronto
- Department of Kinesiology
- Ossur Canada
- ACL Injuries: Interview by CBC Radio in Ontario Morning Show on 9th August 2012.
- CTV 6 PM News on 7th August: news segment featuring Minister Goodyear’s visit to my lab.
- NSERC Impact story “Sidelining Injuries” 7th Aug 2012. http://www.nserc-crsng.gc.ca/Media-Media/ImpactStories-ArticlesPercutants_eng.asp
- “University of Waterloo Research Aims to Prevent Knee Injuries” article in “The Record” newspaper on 8th Oct 2012, Page B1, http://www.therecord.com/news/local/article/775466--uw-research-aimed-at-preventing-knee-injuries.
- “Injury simulator has a leg up on the competition” University of Waterloo Bulletin 8th August 2012.
- “Engineering a Healthy Body” Imprint (UW campus newspaper), P 14, May 18, 2007.
- Trauma Biomechanics and Occupant Safety
- Advanced Manufacturing and Computational Modeling
- Material Testing, Characterization
- Pipeline Integrity
- Moving Boundary Analysis of Cracks and Notches
- Multiaxial Elasto-Plastic and Creep Stress-Strain Analysis Near Notches Under Monotonic and Cyclic Loading
- Weight Functions and Structural Modeling for Stress Intensity Factors
Inal, Kaan A.
- Metal Formability
- Micromechanics, Crystal Plasticity
- Instabilities and Localized Deformation Phenomena in Materials
- High Performance Computing – Parallel Computing
Dr. Jahed’s research focus is on the durability and life enhancement of light-weight materials for sustainable application in transportation industry. His discovery-level research on the fatigue and fracture characterization of lightweight materials under uni- and multi-axial loadings obtains fundamental performance metrics of emerging light-weight materials, which are then utilized in developing cyclic plasticity models for integration with computer aided design software applications. Dr. Jahed’s research on life enhancement and extension of light materials includes developing predictive models for mechanically and/or thermally induced residual stresses; and developing technologies to induce ideal residual stress pattern for maximizing fatigue life.
Areas of Expertise
Fatigue and fracture, cyclic plasticity, residual stress, surface treatment, light-weight metals
Dr. Jahed is the Director of the Fatigue and Stress Analysis (FATSLab) Lab. Key lab equipment includes:
- Instron 8874 Biaxial Fatigue testing System
- MTS 810 Material Test System
- D8 Discover X-ray Diffraction
- SST Series P Cold Spray System
- MTS 3000 Hole Drilling Residual Stress Measurement
- Instron R.R. Moore
- ARAMIS 3D 5MP System with Phase Stepping
- Instrumentation (uni-ad bi-axial extensometers, FBG sensors for strain measurements)
Waterloo Centre for Automotive Research (WatCAR)
- Ford Motor Company
- Honda America Inc.
- Fiat Chrysler Automobiles
- Multimatic Engineering Inc.
- Centerline Windsor
Kwon, H. J.
- Cell traction force measurement using optical sectioning technique
- Mechanical measurement using Digital Image Correlation method
- Constitutive modeling of soft bio-polymers
- Viscous fracture of soft materials
Lambert, S. B.
- Automotive Design
- Design Education
- Fatigue and Fracture
Medley, J. B.
- Influence of Lubricant Additives on Rheology of Elastohydrodynamic Films
- Lubrication of Large Spring-Supported Thrust Bearings
- Wear of Metal-Metal Hip Implants
“Design problems are usually among the most complex and ill-structured kinds of problems encountered in practice” – David H. Jonassen
Oscar Nespoli’s work is concerned with understanding engineering design, (as a high form of problem formulation and solving), and practical applications of design science and methods in industry. His work is also concerned with the science of facilitating the learning of design.
Areas of Expertise
Design science and methods, design practice, design management, engineering and design education.
- Bata Innovation Lab, Toronto, Canada
- Department of Management Science, University of Waterloo
- Continuum modeling, vibration analysis and modal testing of inflatable space structures
- Thermally induced oscillations in space systems
- Wave propagation in composite materials
- Smart materials
- Long-term stability of polymers and their composites due to thermo-mechanical loading, moisture absorption and physical aging
- Adhesive bonding of dissimilar structural materials e.g. composites-to-metals and composites-to-composites
- Micro-engineering – measurement of mechanical property data deviation from bulk values as dimensions are reduced
Worswick, M. J.
- Sheet Metal Forming and Tube Hydroforming
- High Strain Rate Material Behaviour
- Numerical Simulation of Vehicle Crashworthiness