Aynsley Griffin presented her thesis seminar

Friday saw a first for our MCG seminar series – we welcomed a student from civil engineering to present.  Aynsley Griffin presented has MASc work, titled “Evaluation of corrosion detection methods in reinforced concrete structures”. Supervisor Dr. Beatriz Martin-Perez was present and I introduced her to the MCG tradition of getting her photo taken with her graduate student.  Thanks to both Aynsley and Dr. Perez-Martin for participating in our seminar series and its traditions!

 

First seminar of 2017

Kicking things off in 2017 was Simon Baril-Gosselin who presented his PhD thesis work on “Fabrication of carbon fibre opposites reinforced with carbon nanotubes”. Unfortunately, PhD supervisor Dr. François Robitaille was teaching and unable to attend.  However, there was an enthusiastic audience and our grad students were kind enough to supply us with coffee and cookies (because all scientific talks are made better by coffee and cookies.

Simon Baril-Gosselin

Catherine Kuforiji presented her PhD seminar

Last Friday, Catherine Kuforiji presented her PhD thesis work, giving a talk titled “Development of SS316L-AL2O3 composites for wear applications”. Supervisor Dr. Michel Nganbe was present for the seminar.  Congratulations to student and supervisor for the (near) completion of this PhD work!  Well done, Catherine, we are very proud of you.  

After the talk, I had the honour of having my photo taken with Catherine too.  🙂

Bochun Zhang presented his research seminar

Last Friday featured a graduate seminar by my own MASc candidate,Bochun Zhang. Bochun gave a talk titled “Failure Mechanism Analysis and Life Prediction based on Atmospheric Plasma-Sprayed (APS) and Electron Beam-Physical Vapor Deposition (EB-PVD) Thermal Barrier Coatings”.  Bochun’s primary supervisor was Dr. Kuiying Chen, from Canada’s National Research Council, and I was the cosupervisor. Unfortunately, Dr. Chen could not attend, but I’m sure he would have been as proud of Bochun as I was! Well done, Bochun. 


First seminar of the semester – this Friday!

The first seminar of the semester will be this Friday! MASc CandidateMajid Tanbakuei Kashani will be giving a talk on “Effect of Forming Process on the Deformational Behaviour of Steel Pipes”.  The seminar abstract is below.

Date: Friday September 16th

Time: 2:30pm

Room: SITE J0106

 

Abstract

Buried pipeline networks play a vital role in transportation of oil and natural gas from centers of productions to centers of consumptions. A common manufacturing technique for such pipes is the UOE process, where a flat plate is first formed into a U shape, then in an O shape, welded at the seam, and Expanded before being shipped on site. The UOE forming process induces residual strains in the pipe.

When buried pipelines cross the regions of discontinuous permafrost, they undergo differential frost heaving, inducing significant bending deformations, which potentially induce local buckling in the pipe wall. To control local buckling, design standards impose threshold limits on buckling strains. Such threshold values are primarily based on costly full-scale experimental results. Past nonlinear finite element analysis attempts aiming at determining the threshold buckling strains have neglected the presence of residual stresses induced by UOE forming and were thus found to grossly overestimate the buckling strains compared to those based experiments.

Within the above context, the present study focuses on developing a numeric technique to predict the residual stresses induced in UOE forming, and incorporating the residual stresses in 3D nonlinear FEA modeling to predict improved buckling strain limits. Comparisons against conventional analysis techniques that omit residual stresses reveal the importance of incorporating residual stresses when quantifying buckling strains.

Ruben Fernandez presented his PhD thesis seminar

Ruben Fernandez presented his PhD thesis seminar, giving a talk titled “Deposition of Thick Copper Cold Spray Coatings on Steel for Used Nuclear Fuel Repository using Nitrogen and Pulsed Waterjet Surface Preparation.”  

It was a really interesting talk, lots of questions afterwards! Unfortunately, supervisor Dr. Bertrand Jodoin was unable to attend but I am sure he would have been very proud.  The labmates stood in for the supervisor in the obligatory photo. Congrats Ruben on almost completing your PhD!

First seminar of the year!

So, to kick of our 2016 seminar series, Sam Fakolujo presented his PhD thesis work on “Characterisation and Properties Improvement in Armour Ceramics”.  Thesis supervisor Dr. Michel Nganbe was on hand for the presentation. Well done, Sam! Here’s wishing you a successful PhD defence.

   
 

Hafeth Bu Jldain presented his PhD seminar yesterday

Hafeth Bu Jldain presented his PhD seminar yesterday, unfortunately supervisor Dr Francois Robitaille was teaching and could not attend. The talk abstract is below.

Abstract
Aerospace structural components made from polymer matrix composites (PMCs) offer numerous advantages. Their high stiffness and high strength combined with low densities enable lower fuel consumption coupled with higher payloads. As a result, PMCs provide an important economic advantage over typical metallic airframes. Textile reinforcements for PMCs are made by assembling reinforcement fibres, typically carbon. Then, the textile reinforcements are typically cut into smaller pieces, stacked, draped and assembled into a dry assembly called a preform, the shape of which generally approaches that of the PMC part to be made. This manufacturing process is labour intensive and expensive.

Novel thick, net-shape, drapable, high vf textile reinforcements used toward manufacturing aerospace PMCs are being developed at the University of Ottawa. The technology enables the manufacturing of flat, drapable multilayered near net-shape preforms. The bending and in-plane shear behaviours of such novel thick reinforcement textiles was investigated to understand and define the behaviour of such thick fabric reinforcements when formed into required shapes. A bending apparatus was developed for investigating the bending behaviour of these novel thick reinforcement fabrics and an articulated frame shear rig was used for investigating the in-plane shear behaviour. A non-destructive inspection method using infrared imaging was used for investigating and identifying flaws and defects in these thick, dry textile reinforcements, aiming at increasing the quality and reproducibility of the final PMC parts made from these reinforcements.

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