Aarhus Universitets segl

Halid Can Yildirim

Ph.d., Lektor

Education and degrees awarded

Doctor of Science (Technology), with distinction, Aalto University, School of Engineering, Solid Mechanics, 19.11.2013, Espoo, Finland.
Master of Science, with honour, Bogazici University, Institute of Science and Technology, Mechanical Engineering, 03.7.2009, Istanbul, Turkey.

Previous positions and mobility

Feb 2016 - Dec 2018Assistant Professor, Chalmers University of Technology, Department of Structural Engineering, Göteborg, Sweden
Sep 2017- Dec 2018Visiting Faculty, Swiss Federal Institute of Technology Lausanne EPFL, RESSLab, Switzerland.
Dec 2013 - Jan 2016Postdoctoral researcher, Aalto University, School of Engineering, Department of Applied Mechanics, Espoo, Finland.
Nov 2010- Nov 2013Doctoral candidate, Aalto University, School of Engineering, Department of Applied Mechanics, Espoo, Finland.
Sep 2012- Mar 2013Visiting researcher, KTH-Royal Institute of Technology, Department of Lightweight Structures, Stockholm, Sweden.
2007-2010Researcher, Bogazici University, Institute of Science and Technology, Department of Mechanical Engineering, Istanbul, Turkey.
2005-2006Project Developer, Trabzon Chamber of Commerce and Industry, supported by European Union and State Planning Organization, Trabzon, Turkey.

Other education and training, qualifications and skills

Certificate “Leadership Development training for Tenure-track Assistant Professors” at Chalmers. Target: A process to support Professors to become Critical Independent Researchers at the highest international level, 2016-2017.
“Diploma of Higher Education” is awarded by the Division of Engineering Education Research (EER) at Chalmers University of Technology. This was based on the below course taken at Aalto University.
Pedagogical Education at Aalto University.
6.10-8.11.2014A! Peda Intro - 5 Credits (ECTS)
2.12.2014-5.3.2015Course Design - 5 Credits (ECTS)
9.1-6.3.2015Compiling a teaching portfolio - 3 Credits (ECTS)
18.11.2014-09.06.2015Teaching Partner - 3 Credits (ECTS)
BI Norwegian School of Management, International Summer Program, 1.6-7.2008, Oslo, Norway.
Intern, TAV Airports, Management and Heating Ventilating and Air-Conditioning Systems, Ataturk International Airport, 1.6-9.2006, Istanbul, Turkey.
Intern, TEMSA Corporation, Research & Development and Control of products, 1.6-9.2005, Adana, Turkey.

Linguistic skills

Turkishmother tongue

Merits in teaching and pedagogical competence

Teaching of CIVIL 526 Metal Structures at EPFL, 2017-2018.
Teaching of VSM191 Steel Structures at Chalmers, 2016-2018.
Teaching of Kul-49.4350 Fatigue of Structures at Aalto, 2015.
Teaching assistant in ME 241 Statics and Kul-49.4250 Models for Beam, Plate and Shell Structures of Solid Mechanics as well as including a few occasions of lecturing.

Other academic merits

The International Institute of Welding (IIW) from 2010 to present. Yearly participation at the annual and intermediate assemblies since 2010. Active member/expert within the IIW commission XIII-Fatigue of Welded Components and Structures. Yearly contribution to research and scientific papers since 2010.
International Ship and Offshore Structures. Strong collaboration in the group of Materials and Fabrication Technology.
Principal reviewer of the journal “Welding in the World”.
Review referee assignments for journals: International Journal of Fatigue, Materials & Design Fatigue & Fracture of Engineering Materials & Structures (FFEMS), Materials, Aerospace Science and Technology, Materials Science and Engineering Technology andWelding in theWorld. I have reviewed an average of about five articles per year for the past three years.
I have also been a referee for conference special publications.
Invited keynote lectures abroad: 1. “Fatigue improvement of welded steel joints by high frequency mechanical impact treatment”, 4th Symposium on Structural Durability in Darmstadt/Germany, 14-15 May, 2014. 2. “Local stress assessments of fillet welds improved by HFMI treatment”, 2nd Swedish Conference on Design and Fabrication of Welded Structures, Borlänge, Sweden, 9-10 October 2013.

Specific features of selected articles

Halid Can Yıldırım, Gary Marquis, “Overview of fatigue data for high frequency treated welded joints”, Welding in the World, 57 (7/8), pp. 82-96, 2012. This paper is selected because it provides the extracted fatigue data from the literature (over 400 data points) for high frequency mechanical impact (HFMI) treatment. The paper includes extensive analyses of slope estimations for each of 45 data sets including four commonly used specimen geometries. The paper shows that an S-N slope of 5 gives a very good description of individual data set and composite data.
Halid Can Yıldırım, Gary Marquis, “Fatigue strength improvement factors for high strength steel welded joints treated by high frequency mechanical impact”, International Journal of Fatigue, 44, pp. 168-176, 2012. This paper is selected since it gives the novel improvement factors for HFMI treatment in order to utilize high strength steels in complex welded structures. We presented the yield strength correction procedure relating to the yield strength of the parent material in order to perform comprehensive evaluations of fatigue data with various steel grades for the fatigue strength assessments. We proposed a design recommendation including one fatigue class increase in strength (about 12.5%) for every 200 MPa increase in static yield strength according to specimen geometries. We showed that the proposals are conservative with respect to all available data.
Halid Can Yıldırım, Gary Marquis, Zuheir Barsoum, “Fatigue assessment of High Frequency Mechanical Impact (HFMI)-improved fillet welds by local approaches”, International Journal of Fatigue, 52, pp. 57-67, 2013. This paper is selected because we extended the usage of HFMI design curves for local approaches, such as the structural hot spot and the effective notch stress methods, based on the nominal stress proposals and the yield stress correction method. As in the previous case, the proposals are shown to be conservative with respect to the available data.
Halid Can Yıldırım, Gary Marquis, “A round robin study of high frequency mechanical impact treated welded joints subjected to variable amplitude loading”, Welding in the World, 57 (3), pp. 437-447, 2013. This paper is selected because it assists to develop a common design rule for all HFMI technologies. The study includes fatigue test results of HFMI welds treated by four different HFMI technologies. Specimens are subjected to fully-reversed variable amplitude loading. Experimental results indicate that all of the HFMI-improved welds satisfied the previously proposed curves based on both the yield strength and the specimen geometry.
Gary Marquis, Eeva Mikkola, Halid Can Yıldırım and Zuheir Barsoum , “Fatigue strength improvement of steel structures by HFMI: proposed fatigue assessment guidelines”. Welding in the World, 57 (6), pp. 803-822, 2013. This paper is selected since it compiles and presents all the necessary knowledge of HFMI method so far available for developing a design guideline. The document considers the observed extra benefit that is experimentally observed for HFMI-treated high-strength steels. Some observations and proposals on the effect of loading conditions like high mean stress fatigue cycles, variable amplitude loading, and large amplitude/low cycle fatigue cycles are also given.