Journal Articles (EN): Recent submissions
Now showing items 21-40 of 98
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Quasi-Static Mechanical Properties of Post-Processed Laser Powder Bed Fusion Ti6Al4V(ELI) Parts under Compressive Loading
(Applied sciences, 2022)The Ti6Al4V structures in aircraft and biomedical industries are usually exposed to quasistatic loads. Therefore, understanding the quasi-static behaviour of this alloy manufactured by an additive manufacturing process ... -
Numerical Simulation of the Taylor Impact Test for Laser Powder Bed Fusion Parts Based on Microstructural Internal State Variables
(Applied sciences, 2023)The response of any engineering design components to stresses should be predictable, While the response of a material to complex loading, such as high strain rates experienced during service, is difficult to represent ... -
Numerical modelling of Ti6Al4V(ELI) hierarchical honeycomb structures of order one at the vertices
(Results in Engineering, 2024)Lattice structures are used in engineering industries because of their good mechanical properties, including high stiffness, high strength, as well as specific energy absorption and fracture toughness. They are often built ... -
Numerical modelling of DMLS Ti6Al4V(ELI) polygon structures
(Results in Materials, 2023)Numerical modelling is particularly advantageous for analysing structures with complex behaviour. It is used to predict the mechanical properties of structures. Analytical modelling, on the contrary, has limited capacity ... -
Natural cellular structures in engineering designs built via additive manufacturing
(MATERIALS TECHNOLOGY, 2025)Natural cellular structures inspire numerous engineering applications due to their lightweight and good load-bearing capabilities. Variations in their structural configurations result in diverse mechanical properties, ... -
Lattice Structures Built with Different Polygon Hollow Shapes: A Review on Their Analytical Modelling and Engineering Applications
(Applied sciences, 2024)Lattice structures are useful in the aerospace, automotive, infrastructural, and medical fields due to the way they incorporate a lightweight design and good mechanical properties, because of their hollow shapes. This ... -
High Strain Rate Properties of Various Forms of Ti6Al4V(ELI) Produced by Direct Metal Laser Sintering
(Applied sciences, 2021)For analysis of engineering structural materials to withstand harsh environmental conditions, accurate knowledge of properties such as flow stress and failure over conditions of high strain rate and temperature plays an ... -
Evaluation of Dislocation Densities in Various Microstructures of Additively Manufactured Ti6Al4V (Eli) by the Method of X-ray Di raction
(materials, 2020)Dislocations play a central role in determining strength and flow properties of metals and alloys. Di usionless phase transformation of ! in Ti6Al4V during the Direct Metal Laser Sintering (DMLS) process produces ... -
Effects of Stress-Relieving Heat Treatment on Impact Toughness of Direct Metal Laser Sintering (DMLS)-Produced Ti6Al4V (ELI) Parts
(JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2020)The impact toughness of as-built (AB) and stressed-relieved (SR) direct metal laser sintering-produced Ti6Al4V (ELI) was investigated using the standard Charpy impact test over the temperature range of − 130°C to 250°C. ... -
Effects of Quasi-Static Strain Rate and Temperature on the Microstructural Features of Post-Processed Microstructures of Laser Powder Bed Fusion Ti6Al4V Alloy
(Applied sciences, 2024)This study documents an investigation of the flow stress properties and microstructural features of Ti6Al4V (ELI) alloy produced using laser powder bed fusion (LPBF). Selected heat treatment strategies were applied to ... -
Effect of Stress-Relieving Heat Treatment on the High Strain Rate Dynamic Compressive Properties of Additively Manufactured Ti6Al4V (ELI)
(metals, 2020)A study was undertaken on the compressive high strain rate properties and deformation behaviour of Direct Metal Laser-Sintered (DMLS) Ti6Al4V (ELI) parts in two separate forms: as-built (AB) and stress relieved (SR). The ... -
Development of VUMAT and VUHARD Subroutines for Simulating the Dynamic Mechanical Properties of Additively Manufactured Parts
(materials, 2022)Numerical modelling and simulation can be useful tools in qualification of additive manufactured parts for use in demanding structural applications. The use of these tools in predicting the mechanical properties and field ... -
Deformation behaviour, limitations in design, applications, and additive manufacturing of hierarchical honeycombs
(Manufacturing Review, 2025)Hierarchical honeycombs are particularly useful in aerospace industries because of their capability to overcome challenges related to bend-dominated behaviour. These structures are ideal for aeronautical applications ... -
Crystallographic Texture Analysis of As-Built and Heat-Treated Ti6Al4V (ELI) Produced by Direct Metal Laser Sintering
(Crystals, 2020)This paper reports on an investigation of crystallographic texture of as-built and heat-treated Ti6Al4V (ELI) produced by direct metal laser sintering (DMLS). The texture analyses were conducted using electron backscatter ... -
THE INFLUENCE OF EDUCATION REFORMS ON THE EVOLUTION OF TECHNOLOGY EDUCATION: A CASE OF TVET INSTITUTIONS IN KENYA
(International Journal of Engineering Technology Research & Management (IJETRM), 2025)Education reforms have historically played a critical role in shaping the trajectory of technology education. This study investigated the extent to which curriculum adjustments, policy frameworks, and pedagogical ... -
The Influence of Cost on The Evolution of Technology Education: Evidence From Murang’a University of Technology, Kenya
(International Journal of Engineering Inventions, 2025)The evolution of technology education in Kenya has been influenced by multiple factors, among which cost remains a critical determinant. This study examined the influence of cost on the evolution of technology education ... -
Risk Factors for Road Crashes in Nairobi County, Kenya
(THE INTERNATIONAL JOURNAL OF SCIENCE & TECHNOLEDGE, 2019)Road crash in the Transport Industry are a threat to public health and national development in many developing countries. They contribute to poverty by causing deaths, injuries, disabilities, grief, lost of productivity ... -
AUGMENTED REALITY AS A TOOL FOR PRACTICAL SKILLS DEVELOPMENT IN BUILDING AND CIVIL ENGINEERING PROGRAMMES
(IJARIIE, 2025)Augmented Reality (AR) enhances learning by offering immersive, interactive experiences, bridging the gap between theoretical instruction and hands-on practice. In TVET institutions, particularly in Building and Civil ... -
ENHANCING THEORETICAL LEARNING IN ENGINEERING EDUCATION THROUGH AUGMENTED REALITY
(IJARIIE, 2025)Augmented Reality (AR) is an emerging educational technology that enhances learning by creating immersive and interactive experiences, effectively bridging the gap between abstract theoretical concepts and learner ... -
Under Voltage Load Shedding on a Modified IEEE 14-Bus System Using Hybrid ABC-PSO Algorithm for Voltage Stability Enhancement
(Elsevier, 2021-08)Voltage collapse tends to occur due to the voltage instability created during large faults. As a last resort, under-voltage load shedding (UVLS) is performed after all the available power operation and control mechanisms ...
