Chin Tze Ng

Department of Civil and Structural Engineering

Research Student

Full contact details

Chin Tze Ng
Department of Civil and Structural Engineering
Sir Frederick Mappin Building (Broad Lane Building)
Mappin Street
S1 3JD

Chin Tze completed his Master of Engineering (MEng) degree at the University of Sheffield, where he graduated with 1st Class Honours in Civil and Structural Engineering in 2021. Upon graduation, he joined the department of civil and structural engineering to pursue his PhD study on the multiaxial fatigue assessment of aluminium-to-steel welded joints under the supervision of Professor Luca Susmel.

During his undergraduate second-year summer holiday, he was given the opportunity to investigate the static strength of notched additively manufactured (AM) structural components as a research assistant under the Sheffield Undergraduate Research Experience (SURE) scheme. As a research assistant of Professor Luca Susmel, he was entrusted with the responsibilities of performing independent background research, carrying out laboratory tests, and post-processing the raw data to validate the research hypotheses. Through this experience, he was able to attain a deeper understanding towards AM technology as well as enhancing his research, analytical, academic writing, and presentation skills. Under the dedicated supervision and guidance of Professor Luca, he published a research paper titled “Notch static strength of additively manufactured acrylonitrile butadiene styrene (ABS)” in the Elsevier Additive Manufacturing Journal. Subsequently, he published a conference proceedings paper on the research findings in the Procedia of Structural Integrity, 2020. Furthermore, he also presented the research findings at the 1st Virtual European Conference on Fracture (VECF1) 2020 and the International Conference of Undergraduate Research (ICUR) 2019 held in the University of Leeds.


MEng in Civil and Structural Engineering

Research interests

Research Project: Multiaxial Fatigue Assessment of Aluminium-to-Steel Welded Joints

In the effort of fabricating lightweight, cost efficient, and sustainable structural assemblies, welding technologies that can join dissimilar materials together, especially aluminium-to-steel have received considerable attention over the recent years. However, the welding of aluminium-to-steel has always been a challenge due to their significant differences in mechanical, thermo-physical, and metallurgical properties that lead to the formation of a brittle intermetallic (Fe-Al) phase in the weld region. Fortunately, a recent optimised welding technology, namely the EWM coldArc® welding technology was able to overcome the problem of welded joint strength reduction by removing the brittle intermetallic phase. This new technology is certainly remarkable and a new frontier in fabrication may arrive when the desirable mechanical properties of both materials can be adopted concurrent with the reduction in weight and cost of structural assemblies. Thus, in order to fully exploit the potential of EWM coldArc® welding technology, theoretical tools that can predict the multiaxial fatigue behaviour of aluminium-to-steel welded joints accurately, rapidly, and economically become invaluable to practitioners. Therefore, this project aims to investigate the fatigue behaviour of aluminium-to-steel welded joints experimentally and numerically under multiaxial loadings.

The key objectives are:

(a) To experimentally investigate the fatigue strength of welded joints subjected to combined tension and torsion under constant and variable amplitude as well as proportional and non-proportional loading

(b) To post-process experimental results by utilising Finite Element analysis and assessing the effectiveness of various multiaxial fatigue criteria in predicting the fatigue strength of such welded joints

Research group

Structural Engineering & Materials