A5014738535- Composite Material Mechanics
- Mechanical Behavior of Composites
- Additive Manufacturing Materials and Processes
- Additive Manufacturing and 3D Printing Technologies
- Epoxy Resin Curing Processes
- Injection Molding Process and Properties
- Welding Techniques and Residual Stresses
- Numerical methods in engineering
- Composite Structure Analysis and Optimization
- High Entropy Alloys Studies
- Natural Fiber Reinforced Composites
- Fiber-reinforced polymer composites
- Advanced ceramic materials synthesis
- Structural Analysis and Optimization
- Climate Change and Environmental Impact
- Sustainable Development and Policies
- Powder Metallurgy Techniques and Materials
- Elasticity and Material Modeling
- Microstructure and mechanical properties
- Medical Imaging Techniques and Applications
- Non-Destructive Testing Techniques
- Global Energy and Sustainability Research
- High-Velocity Impact and Material Behavior
- Manufacturing Process and Optimization
- Textile materials and evaluations
University of Waterloo
2012-2023
McMaster University
2019-2022
Natural Resources Canada
2019-2022
In this study, line heat inputs are lumped to improve the computational efficiency while preserving stress directionality in laser powder bed fusion (LPBF). The hybrid (LHL) model predicts part distortion accurately within 10 µm of experimental error reasonable time. effects geometry and scanning strategies on failure during LPBF thin-wall components evaluated. Eight different printing patterns including vector lengths interlayer scan rotations for five studied. Simulation results show that...
This is the first of two manuscripts that presents a computationally efficient full field deterministic model for laser powder bed fusion (LPBF). A new Hybrid Line (HL) heat input integrates an exponentially decaying (ED) over portion path to significantly reduce computational time. Experimentally measured properties high gamma prime nickel-based superalloy RENÉ 65 are implemented in predict in-process temperature distribution, stresses, and distortions. The accounts specific material as...
This is the second of two manuscripts that presents a computationally efficient full-field deterministic model for laser powder bed fusion (LPBF). The Hybrid Line (HL) thermal developed in part I extended to predict in-process residual stresses due processing nickel-based superalloy, RENÉ 65. computational efficiency and accuracy HL thermo-mechanical first compared exponential decaying heat input on single-track simulation. LPBF thin-wall builds with three different powers four printing...
Fiber orientation tensors (FOT) are used as a compact form of representing the mechanically important quantity fiber in reinforced composites. While they can be obtained via image processing methods from micro computed tomography scans (μCT), specimen size needs to sufficiently small for adequate resolution – especially case carbon fibers. In order avoid massive workload by and evaluation when determining full-field FOT distributions plaque or part, e.g., comparison with process simulations,...
The effect of fibre length distribution on the fatigue behaviour an injection-moulded PA66 carbon composite is investigated. Two materials, short with a mean 100 microns, and long 580 are subjected to fully reversed loading at room temperature three stress ratios 120 °C. results compared, fracture surfaces analyzed determine differing failure modes between materials conditions. At °C, has significant order magnitudes different life for given amplitude during tensile loading. Under loading,...
Facing the stringent requirements for fuel economy in automotive industry, composite materials are seen to be utilized structural lightweighting. This paper focuses on fatigue test development and behavior of a biaxial [0/90] carbon/epoxy non-crimp fabric composites applications. A new specimen was successfully developed testing under fully reversed loading, i.e. stress ratio R=-1, at room temperature 130 ℃. The prevents buckling during without use an anti-buckling fixture. 3D Digital image...
Thin-wall components made of a hard-to-weld Ni-based superalloy, RENÉ 108, are fabricated using the laser powder bed fusion (LPBF) additive manufacturing (AM) technique. Thirty-two parts, including ten different scan strategies and four wall thicknesses (WTs) between 0.25 mm 1.00 mm, studied compared with conventional continuous 67° rotation (Cont.) strategy. Microstructure characterization shows micro-cracks aligned build direction (BD) melt-pool boundaries. All exhibit inter-dendritic...