V P Kommula

V P Kommula
University of Botswana | UB · Department of Mechanical Engineering

PhD, MEng (Compupter Integrated Manufacturing), BEng (Production Engineering) DME (Mechanical Engineering)

About

53
Publications
17,859
Reads
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403
Citations
Citations since 2016
24 Research Items
366 Citations
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2016201720182019202020212022020406080
Introduction
Kommula V P currently works as Professor (Full) at the Department of Mechanical Engineering, University of Botswana. Kommula does research in the area of Composite Materials, Lean Manufacturing, Productivity Improvement, Six Sigma and Engineering Education.
Additional affiliations
November 2021 - present
University of Botswana
Position
  • Professor (Full)
April 2017 - November 2021
University of Botswana
Position
  • Professor (Associate)
Description
  • Associate Professor & Programme Coordinator for BEng (Industrial Engineering) programme.
May 2012 - March 2017
University of Botswana
Position
  • Professor (Associate)
Description
  • Senior Lecturer and & Programme Coordinator for BEng (Industrial Engineering) programme.
Education
January 2011 - November 2014
University of Johannesburg
Field of study
  • Mechanical Engineering
May 2002 - May 2004
Anna University, Chennai
Field of study
  • Computer Integrated Manufacturing
May 1996 - May 1999
University of Madras
Field of study
  • Production Engineering

Publications

Publications (53)
Article
Full-text available
This article presents the extraction and effect of alkali treatment on the physical, chemical, tensile, and thermal characteristics of fiber strands obtained from Napier grass, a renewable biomass. In order to improve these properties, the Napier grass fiber strands were treated with sodium hydroxide. The alkali treatment was carried out using NaOH...
Article
Full-text available
Napier grass fiber strands were used as reinforcement to obtain composites with epoxy resin as matrix. To improve the surface, these fiber strands were treated with alkali solution. The composites were prepared by means of hand lay-up molding, then the effects of Napier grass fiber strand loading on mechanical properties such as tensile, flexural a...
Article
Napier grass is a high-productivity perennial grass that is a very important forage for animals in the tropics. In this research work, fiber strands from Napier grass were extracted and the effect of acetic acid treatment on their chemical composition, morphological and structural changes, and tensile and thermal properties was studied. The acid tr...
Article
With increasing awareness of protecting the environment, the demand for renewable and environmental materials is increasing. In this work, the cellulose single fibers (CSFs) were extracted from the African native Napier grass fibers (NGFs) by chemical process. NGFs and CSFs were characterized for their chemical composition, structure, morphology, c...
Article
The current practice in engineering education increasingly entails team work and group projects. The ability to work effectively in teams is considered by many to be an essential skill required of today's engineers; some claim that such ability is one of the most desired qualities of a graduate engineer. Group projects are frequently used to improv...
Research Proposal
Full-text available
Smart technologies evolving in recent years provide promising solutions to many challenging issues faced by the manufacturing industries. Smart technologies involved in the transformation process are IoT, big data and data analytics, autonomous robots, cyber-physical systems, digital twins, augmented and virtual reality, cloud computing, blockchain...
Article
The continued ambition of many organizations is to supply products that conform to customer specifications at the right time and in the right quantities. The work undertaken in this study was a step towards assisting the case study organization in achievement of that goal. As one of the quality management activities, the case study organization’s r...
Article
Current educational approaches in engineering education should provide students with attributes required in professionalpractice. Active learning, in the form of Problem-Based Learning (PBL) and Project-Based Learning (PjBL), as aneducational approach, shows promise in engineering. The paper describes the attitudes of students towards the applicati...
Conference Paper
This paper presents microstructural and metallurgical characterization of prematurely retired from service high pressure (HP), PT6A-114A engine CT blades at 6378 creep-fatigue hours against a preset 10000 creep-fatigue hours. Sample preparation entailed; sectioning, mounting, grinding, polishing and carbon coating. A detailed microstructural and me...
Article
This paper presents results from modeling of Compressor Turbine (CT) blades for short-haul aircraft fleet occasioned by thermo-mechanical stresses in order to comprehend the occurrence of premature failure. A 3D PT6A-114A engine high pressure (HP) CT blade geometrical model was developed in commercial CAD-SolidWorks, then imported to ANSYS 15.0 env...
Article
This paper investigates premature failure of High Pressure (HP) PT6A-114A Compressor Turbine (CT) blades used for short-haul aircraft fleet at 6378 h, contrary to 10000 h pre-set by the manufacturer. The CT blades were sectioned both transversely and longitudinally and subjected to several microstructural examinations; X-ray Diffraction (XRD), X-ra...
Article
Full-text available
The predominant educational methods in engineering education follow traditional classroom teaching, with some elements of tutorials and lab work. Although, there has been a growing tendency in recent years to introduce elements of active learning, and in particular problem-based (PBL) and project-based learning (PjBL). The paper reports on an attem...
Article
Demand for newer, stronger, stiffer, yet lighter-weight and environmental friendly (biodegradable) materials in the fields such as automobile for non-structural applications are ever increasing. The principal reasons for using natural (cellulosic) fibers is they possess several attractive properties such their economic feasibility, enhanced sustain...
Article
This paper investigates the role degradation of protective diffusion aluminide coating on Inconel 713LC used for CT blades of short-haul aircraft fleet played in having the blades prematurely retired from service at 6378 hours, as opposed to their pre-set service time of 10000 hours. The blade samples were subjected to various examinations; X-ray d...
Article
Energy systems are complex dynamic systems that are often associated with uncertain system behavior. System behavior is influenced by several dynamic uncertainties, nonlinear relationships between system variables, time lags, and interactive feedback loops that are inherent in the energy system. In turn, these complexities are a result of the under...
Article
The aim of this study was to investigate the utilization of milkweed fruit floss residues as a source for the isolation of cellulose. Cellulose was extracted by acidified sodium chlorite and sodium hydroxide treatments. Characterization of the pristine milkweed floss and extracted cellulose was performed by chemical composition analysis, Fourier tr...
Article
This project was undertaken to explore the journey to productivity improvement by a local hospital. The hospital recently implemented two process improvement tools, 5S and TQM. The project assessed the company’s adoption level for the two lean tools they implemented, as well as assessing how the implementation impacted productivity and service deli...
Article
Full-text available
Business Information systems (BIS) play a major role in improving the competitiveness of many enterprises. Enterprise resource planning (ERP) systems are the major BIS systems in use today and will continue to be going into the future. ERP systems are highly complex systems which are meant to provide several integration benefits. Implementation of...
Conference Paper
The involvement of key suppliers is essential to new ventures introducing radical innovations, especially in manufacturing supply chains. However, due to the presence of interactive dynamics of a number of factors in supply chain systems, integrative product development is a complex task. As such, manufacturers should have in place a well-designed...
Article
Full-text available
Optimizing system reliability in a fuzzy environment is complex due to the presence of imprecise multiple decision criteria such as maximizing system reliability and minimizing system cost. This calls for multi-criteria decision making approaches that incorporate fuzzy set theory concepts and heuristic methods. This paper presents a fuzzy multi-cri...
Conference Paper
An aircraft turbine is the power harness of the engine. It however, operates under intense mechanical, extreme aerodynamic and severe temperature loading. The extremes of these environments renders turbine blade material to be vulnerable to attacks by: corrosion, erosion, oxidation, fretting, crack formation, crack propagation, creep, fatigue, or e...
Conference Paper
Full-text available
An aircraft turbine is the power harness of the engine. It however, operates under intense mechanical, extreme aerodynamic and severe temperature loading. The extremes of these environments renders turbine blade material to be vulnerable to attacks by: corrosion, erosion, oxidation, fretting, crack formation, crack propagation, creep, fatigue, or e...
Article
Full-text available
In order to obtain cellulose microfibers from Palmyra palm fruit fibers, a new succession of specific chemical treatments including acidified-chlorination, alkalization, and acid hydrolysis have been developed. Cellulose microfibers obtained were characterized by different techniques. The chemical analysis indicated an increase in α - cellulose con...
Article
Full-text available
The purpose of this study was to investigate ways to improve productivity of a local security garage door manufacturing company. The company is based in Gaborone, Botswana and faces serious productivity challenges, including long throughput time, high inventory, and low worker utilisation. The result of these challenges is poor product quality and...
Chapter
System reliability optimization often involves multiple fuzzy conflicting objectives, for instance, reducing system cost and reliability improvement. This paper presents a system reliability optimization problem for the complex bridge system. First, the problem is formulated as a fuzzy multi-criteria nonlinear program. Second, we propose a fuzzy mu...
Article
This project was undertaken to explore the journey to productivity improvement by a local hospital. The hospital recently implemented two process improvement tools, 5S and TQM. The project assessed the company’s adoption level of the two implemented lean tools, as well as assessing how the implementation impacted productivity and service delivery a...
Article
Full-text available
The current manuscript focuses on the importance of optimising facilities layout planning in order to meet the high demands of customer satisfaction. An analysis of a machine workshop layout was carried out to assess optimality of its performance. An alternate layout that considers strategic methods currently used by competitive and successful comp...
Article
Full-text available
Napier grass fiber strands were extracted using the combined mechanical and water retting process. The extracted fiber strands were treated with various proportions (5, 10 and 15% w/v) of NaOH solution to improve their surface morphology and bonding with the resin. This study investigates the impact properties of composites made by reinforcing alka...
Conference Paper
Full-text available
Native African grown Napier grass fibers are treated with acetic acid and subjected to instrumental analysis to characterize these natural fibers. The impact of acetic acid treatment on the composition and structure of Napier grass fibers was evaluated and reported in this study. X-Ray diffraction, FTIR spectral analysis and Thermo gravimetric meth...
Conference Paper
Simulation of the green supply chain is inundated with complexities due to reverse flows, reverse logistics, product recovery, reuse, recycling, remanufacturing, and other green initiatives. The focus of this research is to develop a conceptual framework which forms a platform for building simulation models from a discrete-event simulation perspect...
Article
This paper highlights the development of a mathematical model to find the relationship of compressive strength of flyash cement bricks with other process parameters namely, percentage of flyash, sand and cement and water. Here, non linear one parameter polynomials are fitted using the existing experimental data. It is seen that the fitting with the...
Chapter
General Education Courses (GEC) are natural sources of "soft" skills in engineering curricula. Such skills are becoming increasingly important if the graduates are to operate successfully and be fully integrated in their workplaces. The importance of "soft" skills is fully recognized by engineering accreditation boards. The chapter reports on the e...
Article
Full-text available
Design activity is core to modern engineering practice. Some design experience is demanded by professional bodies that accredit degree engineering programmes (e.g. ABET and ECSA). The purpose of this paper is to track design related topics through the curriculum of the mechanical engineering degree programme at the University of Botswana. A questio...
Article
Surface roughness monitoring techniques using non-contact methods based on computer vision technology are becoming popular and cost effective. An evolvable hardware configuration using reconfigurable Xilinx Virtex FPGA xcv1000 architecture with capability to compensate for poor illumination environment is proposed in this paper. In this work one of...
Article
Blackboard is a computer-based learning platform that enhances communication between educators and learners mostly in higher education institutions. However, it is through its optimum utilisation that the potential benefits it offers can be fully realised. This article presents a study that was carried out at the University of Botswana, Mechanical...
Article
Full-text available
This paper provides an argument on the importance of "Digitizing the survival ideas for future generations: African wild fruits" in digital learning era. There is enormous scope for re-use of this digital content, for example, as learning materials. This can be realised through research funded by public or charitable organizations that require open...
Article
Full-text available
Machine vision has evolved to become a mainstream automation tool, enabling computers to replace human vision in high speed and precision manufacturing techniques. Machine vision systems are used to capture image, extract information using vision sensors and make intelligent decisions. Images usually acquired through modern cameras may be contamina...

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Projects

Projects (5)
Project
Apply the theory of DfAM in the manufacturing of prosthetic devices via DMLS using Ti6Al4V. Consider material selection, accuracy of the final product and optimum process parameters for DMLS.
Project
1) To study the drying characteristics of brewery residue. 2) To modify Valu Feeds' chicken feed dryer. 3) To simulate the performance of the improved feed dryer.
Project
To study the impact of problem based learning in Mechanical Engineering undergraduate courses.