A.K.M. De Silva
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View article: Flow curve approximation of high-strength aluminium alloys in heat-assisted forming processes
Flow curve approximation of high-strength aluminium alloys in heat-assisted forming processes Open
Predicting the flow behaviour at high strain values beyond uniform elongation is a critical factor in sheet metal forming, especially in the context of heat-assisted forming processes of lightweight materials. Based on uniaxial tensile tes…
View article: Simulation of electrolyte behaviour of industrial electrochemical machining
Simulation of electrolyte behaviour of industrial electrochemical machining Open
Development of simulation models for electrochemical machining (ECM) is a widely researched challenge to avoid the traditional trial and error process, with potential resulting advantages in terms of time, cost, and sustainability. To this…
View article: Influence of Laser Polishing on the Material Properties of Aluminium L-PBF Components
Influence of Laser Polishing on the Material Properties of Aluminium L-PBF Components Open
In this study, the influence of laser polishing on the microstructural and mechanical properties of additively manufactured aluminium AlSi10Mg Laser Powder Bed Fusion (L-PBF) parts is analysed. The investigation is carried out on a 5-axis …
View article: Individual process development of single and multi-material laser melting in novel modular laser powder bed fusion system
Individual process development of single and multi-material laser melting in novel modular laser powder bed fusion system Open
Additive manufacturing and especially the laser-based powder bed fusion (LPBF) with full melting of the powder offers tremendous potential and versatility for manufacturing high quality, complex, precision metal parts. However, for novel p…
View article: Precision improvements in ECM via tool insert development by 3D printing
Precision improvements in ECM via tool insert development by 3D printing Open
This paper reports the tool developments for electrochemical machining (ECM) of precision parts for automotive industry using polymer 3D printed inserts. The role of these inserts is to control the fluid flow in the inter-electrode gap as …
View article: Direct laser writing of optical gratings on additive manufactured metal surfaces
Direct laser writing of optical gratings on additive manufactured metal surfaces Open
Enhancing the functionality of surfaces has increasingly become the focus of modern engineering in recent years. Functional material surfaces can be developed through targeted micro structuring. For example, surface modifications by micro …
View article: Laser Polishing of Additive Manufactured Aluminium Parts by Modulated Laser Power
Laser Polishing of Additive Manufactured Aluminium Parts by Modulated Laser Power Open
In this study a new approach to laser polishing with periodic modulated laser power in the kilohertz regime is introduced. By varying the modulation frequency and modulation time, different periodic laser power curves with varying minimum,…
View article: Adhesively bonded CFRP/Al joints: Influence of the surface pretreatment on corrosion during salt spray test
Adhesively bonded CFRP/Al joints: Influence of the surface pretreatment on corrosion during salt spray test Open
The objective of this study was to investigate the influence of different surface pretreatments on the aging behavior of adhesively bonded carbon fiber reinforced polymers/Al joints in a standardized salt spray environment. Therefore, the …
View article: Process parameter dependencies of continuous and pulsed laser modes on surface polishing of additive manufactured aluminium AlSi10Mg parts
Process parameter dependencies of continuous and pulsed laser modes on surface polishing of additive manufactured aluminium AlSi10Mg parts Open
Laser powder bed fusion is a well‐established 3D printing technique for metal alloys, but exhibits a poor surface quality. Laser polishing provides the possibility of a fast contact‐free and fully‐automatable surface treatment. This paper …
View article: Single Track Ultra-short Pulsed Laser Ablation on Additive Manufactured Metallic Surfaces
Single Track Ultra-short Pulsed Laser Ablation on Additive Manufactured Metallic Surfaces Open
Additive Manufacturing (AM), also called 3D printing, have been proved as a method to offer new possibilities for the production of highly complex parts. One new interesting but yet small field of application is the 3D printing of complex …
View article: Laser Polishing of Laser Powder Bed Fusion AlSi10Mg Parts—Influence of Initial Surface Roughness on Achievable Surface Quality
Laser Polishing of Laser Powder Bed Fusion AlSi10Mg Parts—Influence of Initial Surface Roughness on Achievable Surface Quality Open
Laser Powder Bed Fusion (LPBF) is an Additive Manufacturing technique, which allows production of highly complex solid metal parts with good mechanical properties, compared to conventionally manufactured parts. Nevertheless, the layer-by-l…
View article: Shape Optimization Study on Composite Material Using Finite Element Analysis
Shape Optimization Study on Composite Material Using Finite Element Analysis Open
This study attempts to improve the use of composite materials in engineering applications through shape optimization by adopted finite element analysis (FEA) tools and regression models. SolidWorks was used to develop the geometries, ANSYS…
View article: Importance and Applications of Robotic and Autonomous Systems (RAS) in Railway Maintenance Sector: A Review
Importance and Applications of Robotic and Autonomous Systems (RAS) in Railway Maintenance Sector: A Review Open
Maintenance, which is critical for safe, reliable, quality, and cost-effective service, plays a dominant role in the railway industry. Therefore, this paper examines the importance and applications of Robotic and Autonomous Systems (RAS) i…
View article: Impact of nano additives on electroless nickel phosphorous (EN-P) coating
Impact of nano additives on electroless nickel phosphorous (EN-P) coating Open
An experimental work has been carried out to identify the impact and evaluation of various Nano additives in Electroless Nickel-Phosphorous (EN-P) bath. Different coatings were developed through EN-P bath on ASTM A106 B substrate influence…
View article: Geometrical shape improvement of steel moulds by robot polishing process for polymer optic replication
Geometrical shape improvement of steel moulds by robot polishing process for polymer optic replication Open
The quality of injection-moulded polymer optic parts depends on the surface finish of the respective mould. In order to improve the surface finish of the mould, it is important to use a tactical material removal, which allows a controlled …
View article: Influence of different polishing materials in the material removal of steel samples
Influence of different polishing materials in the material removal of steel samples Open
The quality of injection moulded polymer optic parts depends on the surface finish of the respective mould. In order to improve and control the surface finish of the mould it is important to be able to keep the material removal constant du…
View article: Analysis of the Effect of Defects for Fatigue Life of Composite Wind Turbine Blades Using FEM Data
Analysis of the Effect of Defects for Fatigue Life of Composite Wind Turbine Blades Using FEM Data Open
One of the main global engineering challenges for wind energy sector is to develop efficient wind turbine blades with high fatigue life. Large wind turbine blades made out of polymer composites to delivering high specific stiffness and str…
View article: Strategic Quality Control Measures to Reduce Defects in Composite Wind Turbine Blades
Strategic Quality Control Measures to Reduce Defects in Composite Wind Turbine Blades Open
Wind turbine blades are made from polymer composites to provide high specific stiffness, strength, and good fatigue performance. However, large composite structures are prone to manufacturing defects such as delamination and adhesive failu…
View article: A Study on Automating Rolling-stock Maintenance in the Rail Industry using Robotics
A Study on Automating Rolling-stock Maintenance in the Rail Industry using Robotics Open
Maintenance cost of United Kingdom’s rail rolling stock is a substantial portion of its whole life costs. Therefore, it is vital to conduct these maintenance tasks in an efficient and cost-effective manner to minimize operational costs whi…
View article: Material removal simulation for steel mould polishing
Material removal simulation for steel mould polishing Open
The surface finish of an injection mould influences the quality of the moulded polymer optic parts. In order to improve and control the surface finish of the mould it is important to be able to predict the material removal during the polis…
View article: Polishing material removal correlation on PMMA – FEM simulation
Polishing material removal correlation on PMMA – FEM simulation Open
The complexity of polishing is very high and experience in this field is required to achieve reproducible deterministic results concerning shape accuracy. The goal of this work is to predict the material removal of the polishing process on…
View article: Polishing material removal correlation on PMMA – FEM simulation
Polishing material removal correlation on PMMA – FEM simulation Open
The complexity of polishing is very high and experience in this field is required to achieve reproducible deterministic results concerning shape accuracy. The goal of this work is to predict the material removal of the polishing process on…
View article: Ascertaining Life Cycle Inventory Data for Electrical Discharge Machining
Ascertaining Life Cycle Inventory Data for Electrical Discharge Machining Open
Sustainable manufacturing systems require accounting for both product and process level environmental impacts. Established methods and databases are available for product level environmental impact assessment. However, there is a lack of d…
View article: Effect of Wire Breakage on the Process Energy Utilisation of EDM
Effect of Wire Breakage on the Process Energy Utilisation of EDM Open
Optimum energy utilisation is a major concern during machine tool design, as not only is energy consumption an environmentalimpact/sustainability indicator; it also affects the production economics. Most electrodischarge (EDM) machines hav…