Prof Hannalie Lombard

BSc, HED, BSc.Hons, MSc, PhD

 

Associate Professor

Department of Mechanical Engineering

Hannalie.lombard@mandela.ac.za

041 5043277

North Campus, Engineering Building(276) Room 0125

Biography / Background

 
Hannalie Lombard is an Associate Professor at the Nelson Mandela University. She holds a Doctor of Philosophy (PhD) from Plymouth University: Faculty of Science and Engineering (former Faculty of Technology) with a thesis entitled. Optimized fatigue and fracture performance of friction stir welding aluminium plate: A study of the inter-relationship between process parameters, TMAZ, microstructure, defect population and performance.  Her research investigates a process windows of the influence of input welding parameters on the quality and mechanical properties of 5083-H321 aluminium alloy. This research was conducted to determine whether online monitoring system’s data could predict weld properties. This work contributed to advancing the ability in predicting optimized process conditions for Friction Stir Welding joints by linking residual stress state with the characteristic force footprint as well as dynamic fatigue properties.
 
Awards and Achievements
  • Emerging researcher in the Department of Mechanical Engineering in 2007.
  • Best abstract submitted by a student author for the Microscopy Society of South Africa (MSSA) conference in December 2004.
  • Most cited articles 2004 to 2008 awarded by Elsevier for the article: James, MN; Hughes, DJ; Chen, Z; Lombard, H; Hattingh, DG; Asquith, D; Yates, JR and Webster, PJ (2007) Residual stresses and fatigue performance Engineering Failure AnalysisVolume 14, Issue 2, Pp. 384-395.

Professional Activities

  • Registered as a Professional Scientist at the South African Council for Natural Scientific Professions (SACNASP) since 2010.
  • Associate  member  of  the  South  African  Institute  of  Refrigeration  and  Air Conditioning (SAIRAC).
  • Member of The Microscopy Society of Southern Africa (MSSA)

Teaching Interests

One of the most important aspects of teaching any engineering module is to bridge the gap between theoretical content and practical real-life problems. It is an honour and privilege to share knowledge with student learners and assisting them to understand difficult concepts in the fields of materials science, mechanics and heat transfer. I believe that real learning is achieved by active learning. My teaching is thus driven by providing students the opportunity to actively engage with module content to expand their knowledge and analytical abilities to enable them to perform problem solving. This is achieved by assignments and experimental work performed in groups/individual utilizing teaching modes of online or face to face.

Integrating writing practices in teaching any module remains an important component in training Engineers or Technologists. A study was undertaken to make explicit and enact language and discourse features in an assessment rubric, so that respondents on the “inside” of disciplines (lecturers), as well as “outsiders” (language educators and students), can formatively assess and give different kinds of feedback – global and local (specific) – in different modes (oral and written) to drafts of laboratory reports in modules. The rubric provided students a guideline of how to write a laboratory report.


Research Interests

My research embraces the idea of weld performance optimization as well as material property characterization as key research activities and presents my investigations into application of any welding technology to produce welds with desired properties. Themes of interests are focused in mainly two areas: modelling of heat transfer in welded plates and Optimization and characterization of welding of dissimilar materials.


Representative Publications

Journal Publications:

Oyedemi  K , McGrath P, Lombard H and Varbai B (2017). A Comparative Study of Tool-Pin Profile on Process Response of Friction Stir Welding of AA6082-T6"  Periodica Polytechnica Mechanical Engineering.

Stroud T, Els  S , Lombard H (2015). Off-Road Vehicle Active Suspension Using Fluidic Muscle Proceedings Prasa-RobMech International conference, 25-26 November Port Elizabeth, South Africa.

Mashinini P.M., Hattingh D.G. and Lombard H(2014). Influence of Process Heat Input on Static and Dynamic Properties of Friction Stir Welded 3mm Ti6Al4V Alloy. Advanced Materials Research Vol. 1019 (2014) pp 287-293 © (2014) Trans Tech Publications,  Switzerland.

PJ McGrath and H Lombard(2014). Consequences of the higher education qualifications sub-framework (HEQSF) on workplace-based learning (WPL) in the South African context 8th International Technology, Education and Development Conference INTED2014, 10-12 March, Valencia,Spain. ISBN: 978-84-616-84210.

H Lombard and PJ McGrath(2014). Enhancing Learning and Writing of Laboratory Reports in materials Science for First Year Undergraduate Learners. 8th International Technology, Education and Development Conference INTED2014. 10-12 March, Valencia,Spain ISBN: 978-84-616-84210.

H Lombard, DG Hattingh, A Steuwer, MN James(2009) Effect of Process Parameters on the Residual Stresses in AA5083-H321 friction stir welds.  Materials Science and Engineering A, 501 pp.119-124 ISSN 0921-5093.

MN James, S-P Ting, M Bosi, H Lombard and D G Hattingh(2009), Residual strain and hardness as predictors of the fatigue ranking of steel welds,, International Journal of Fatigue (Elsevier) volume 31(8-9)  pp.1366-1377ISSN 0142-1123.

H Lombard, D G Hattingh, A Steuwer and M N James (2008), Optimising FSW process parameters to minimise defects and maximise fatigue life in 5083-H321 aluminium alloy, Engineering Fracture Mechanics volume 75 pp.341-354 ISSN 0013-7944.

James , MN; Lombard, H; Hattingh, DG and Steuwer, A (2007) Optimising Weld Process Conditions for Enhanced Fatigue Performance.

Key Engineering Materials, Vols. 348-349,  Trans Tech publications Pp. 561-564. (Also Published in Advanced Fracture and Damage Mechanics IV p561-564)

James, MN; Hughes, DJ; Chen, Z; Lombard, H; Hattingh, DG; Asquith, D; Yates, JR and Webster, PJ (2007). Residual stresses and fatigue performance Engineering Failure Analysis. Volume 14, Issue 2, Pp. 384-395. [ SNIP 2013 0.893]

M N James, G R Bradley, H Lombard and D G Hattingh (2005), The relationship between process mechanisms and crack paths in friction stir welded 5083-H321 and 5383-H321 aluminium alloys, Fatigue and Fracture of Engineering Materials and Structures, 28 pp.245-256 ISSN 0160-112.

M N James, D J Hughes, Z Chen, H Lombard, D G Hattingh, D Asquith, J R Yates and P J Webster (2005), Plenary paper:Residual stresses and fatigue performance, Anales de Mecánica de la Fractura (Anejo), Proceedings of the 22nd Conference of the Spanish Fracture Group, Almagro, Spain, 9-11 March 2005 (eds. JC Galvez, EWVChaves and MJCasati), 22 pp.9-20, ISSN 0213-3725, also on CD-ROM ISBN:CR-235-05.

MN James, S-P Ting, H Lombard, DG Hattingh, DJ Hughes and PJ Webster (2004), Residual Stresses, Process Optimisation and Fatigue – Insights From Neutron and Synchrotron Diffraction, presented at a Symposium on Engineering Applications of Neutron and Synchrotron Radiation, ESRF-ILL, Grenoble, France, 13-14 September 2004.

Chowels, AG; Neethling, JH; van Niekerk, H; Engelbrecht, JAA and Watters, VJ (1995)

Deposition and Characterization of CuInSe2. Renewable Energy, p 6.

Conference Publications

M Bardenhorst, H Lombard (2017). Design of an ultra-lightweight eco-car wheel rim through the sequential use of topology and composites optimization software packages.  Altair Technical Conference:June 26th - 28th in Frankenthal, Germany,2017

Stroud T, Els  S , Lombard H (2015). Off-Road Vehicle Active Suspension Using Fluidic Muscle

Proceedings Prasa-RobMech International conference, 25-26 November Port Elizabeth, South Africa.

Mashinini P.M., Hattingh D.G. and Lombard H(2014). Influence of Process Heat Input on Static and Dynamic Properties of Friction Stir Welded 3mm Ti6Al4V Alloy. Periodical of Advanced Materials Research Vol. 1019 in 2014 with the title AMI Light Metals Conference.

H Lombard and A Knott(2013). Writing laboratory reports in a Mechanical Engineering course at a

comprehensive university: Knowledges, practices, beliefs and experiences of

first-year National Diploma students. Proceedings of the 2nd Biennial Conference of the South African Society for Engineering Education(SASEE), Cape Town 11-12 June 2013: Extended Abstracts

Knott ,A; Lombard, H and McGrath, P (2011).

Towards collaborative practices of academic citizenship in mechanical engineering education at a comprehensive university: A critique of discourses. Proceedings of the First Biennial Conference of the South African Society for Engineering Education (SASEE). Cape Town: SASEE (pp117-131).

P M Mashinini, D G Hattingh and H Lombard(2011). Effects of process parameters on microstructure of Ti-6Al-4V friction stir welded joints. ZrTa2011 New Metals Development Network Conference 12–14 October 2011 Mount Grace Country House & Spa, Magaliesburg

N Vosloo, J Gonsalves and H Lombard(2011). Modelling of heat transfer in friction stir welding. ZrTa2011 New Metals Development Network Conference 12–14 October 2011 Mount Grace Country House & Spa, Magaliesburg

Hattingh, DG, Mashinini, PM and Lombard, H (2010). Evaluation of tool geometry and process variables in Ti-6Al-4V friction stir welds as a function of macrostructure and static strength. The Southern African Institute of Mining and Metallurgy Advanced Metals Initiative, Light Metals Conference 2010. Misty Hills, RSA. ISBN 978-192-041-0100.

Akinlabi A; Els-Botes A and Lombard, H (2010). Effect of tool displacement on defect formation in friction stir welding of aluminium and copper 8th International Friction Stir Welding Symposium, 18-20 May 2010, Timmendorfer Strand, Germany.

MN James, S-P Ting, M Bosi, H Lombard and D G Hattingh(2009). Fatigue ranking of steel welds, Proceedings of the (2009), Plenary paper:New insights into predicting proceedings Workshop on Fatigue of Welded Structures, Italian Fracture Group,Forni di Sopra, Italy, 9-10 March 2009.

Doubell, P; Hattingh, DG; Wedderburn, IN and  Lombard, H (2008) Friction Welding Repair Techniques for Power Plant. SAIW 60th Aniversary conference 28-29 May 2008, Gold Reef City Hotel and Conference Centre.

Doubell, P; Hattingh, DG; Wedderburn, IN and Lombard, H (2008). Friction Stud Welding Repair Techniques. Welding and repair technology for power plants, Eight International EPRI- Electric Power Research Institute Conference, 18-20 June 2008, Sanibel Harbour Resort and Spa, Fort Myers, Florida.

Lombard, H; Hattingh, DG and James, MN (2008). Intrinsic Defects formed in FSW light metal AA5083-H321, AMI Conference, 18- 20 November 2008, Gold Reef City, JHB South Africa.

M N James, H Lombard, D G Hattingh and A Steuwer (2007), Keynote paper:Optimising Weld Process Conditions for Enhanced Fatigue Performance, Proceedings of the 6th International Conference on Fracture and Damage Mechanics,

Madeira, Portugal 17-19 July 2007, Key Engineering Materials 348-349 pp. 561-564. ISSN: 0878494480.

Lombard, H; Hattingh, DG; Steuwer, A and James, MN (2006) Relationships among FSW Process Parameters, Defects, Crack Paths and Fatigue Strength in 5083-H321 Aluminium Alloy. Proceedings of the 2nd International conference of fatigue Crack paths, Parma, Italy,14-16 September.

Lombard, H; Hattingh, DG; Steuwer, A  and James, MN (2006) Synchrotron Diffraction Residual Strain Scanning in Friction Stir Welds as a Function of Process Conditions.

Proceedings of 6th International Friction Stir Welding Symposium, Saint-Sauveur Nr Montreal, Canada, 10 - 13 October.

H Lombard, D G Hattingh and M N James (2005), Synchrotron Residual Strain Scanning in Friction Stir Welds as a Function of Process Conditions, Euromat 2005, European Conference on Advanced Materials and Processes, Prague, Czech Republic, 5-8 September 2005.

James, MN; Hughes, DJ; Chen, Z; Lombard, H; Hattingh, D; Asquith, D; Yates, JR and Webster, PJ(2005). Residual stress and Fatigue performance. Proceedings of the 22nd  Conference of the Spanish Fracture Group, Almagro, Spain, 9-11 March 2005 Pp 9-20. ISSN 0213-3725

Lombard, H; Brendt, PR; Neethling, JH; James, MN and Hattingh, DG (2004) An investigation of AL-FE-Mn-Si Precipitates in Al 5083-H321. Proceedings of Electron Microscopy Society of South Africa .

van Niekerk, H; Engelbrecht, JAA; Neethling, JH; and Chowels, A (1995) Investigation of Electrodeposited CuInSe2 layers. PV Con., A conference on Photovoltaic Technology, South Africa.

van Niekerk, H; Engelbrecht, JAA and Neethling, JH (1995). CuInSe2 obtained from Sequential Electrodeposition of Cu-In-Se precursors. Proceedings of Electron Microscopy Society of South Africa, p 50.

Chowels, AG; Neethling, JH; Engelbrecht, JAA; Watters, VJ and van Niekerk, H (1994)

The Deposition and Characterization of CuInSe2. International  Conference  on  Solar  Electricity:  Photovoltaics  and  Wind,Cairo, Egypt.

van Niekerk, H; Engelbrecht, JAA; and Neethling, JH (1993) Electrodeposition of CuInSe2.

Proceedings of Electron Microscopy Society, 23, p 81.