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Latest articles for Journal of Physics: Conference Series

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  • On the Influence of Thickness Non-uniformity on Mechanical Behaviour under Small Punch Load
    The Small punch (SP) test is an alternative method to determine the mechanical properties of various materials, including metallic and non-metallic. It uses a relatively small amount of material as a test sample and causes minimum damage to the components during sample extraction, giving it advantages over conventional test methods. However, preparing SP samples with accurate and uniform thickness is challenging. This issue leads to inconsistency in the mechanical properties data obtained from the SP test. The present study numerically investigates the effect of non-uniform sample thickness on the displacement-force data of alloy steel under small punch load at room temperature. The thickness of the sample varies in both radial and through-thickness directions to simulate real material conditions during the laboratory sample preparation stage. This variation in thickness is modelled in Finite Element (FE) Abaqus v6.14 software, considering axis-symmetric conditions. Appropriate load, boundary conditions, and mesh design are assigned to the model. It is found that the non-uniformity of the sample in through-thickness direction affects the displacement-force behaviour of the material. Furthermore, the stress and strain distribution are also affected. The displacement-force response, however, remains constant under the effect of radial non-uniformity. Based on the study, it can be concluded that sample preparation is a critical stage which requires exceptional attention to obtain reliable results in the SP test.

  • preface
    It is with great pleasure that we present the proceedings of the 3rd International Postgraduate Conference on Mechanical Engineering 2024 (IPCME 2024), held on 3rd October 2024, at Universiti Malaysia Pahang Al Sultan Abdullah. This annual event has become a prominent platform for postgraduate researchers, academics, and industry professionals to engage in meaningful discussions, share their innovative findings, and explore future directions in the ever-evolving field of mechanical engineering. The theme of IPCME 2024, “Innovation of Sustainable Engineering: Shaping The Future,” underscores the pivotal role that mechanical engineering plays in addressing global challenges, including energy sustainability, climate change, and technological advancements. This theme has inspired a rich array of contributions from researchers across the globe, highlighting cutting-edge developments in areas such as thermal sciences, advanced manufacturing, materials engineering, fluid dynamics, and energy systems. The proceedings encompass a diverse collection of high-quality research papers that underwent rigorous peer review to ensure their relevance, originality, and scientific rigour. These papers reflect the innovative spirit and dedication of the postgraduate community, providing insights into fundamental and applied research that will shape the discipline’s future. We are particularly proud of the collaborative nature of this conference, which has facilitated knowledge exchange and fostered international networks among participants. The discussions and ideas generated during IPCME 2024 are a testament to the strength and vibrancy of the mechanical engineering research community. We extend our heartfelt gratitude to all the authors, reviewers, and session chairs for their invaluable contributions and to the organizing committee and sponsors for their unwavering support. Their efforts have been instrumental in ensuring the success of this conference. We hope that the papers presented in this volume will serve as a valuable resource for researchers, educators, and practitioners and that they will inspire further innovation and collaboration in the field of mechanical engineering. We look forward to seeing the impact of these contributions in advancing knowledge and addressing the pressing challenges of our time. List of Organizing Committee and Scientific Committee are available in this pdf.

  • Peer Review Statement
    All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing. • Type of peer review: Single Anonymous • Conference submission management system: Morressier • Number of submissions received: 36 • Number of submissions sent for review: 36 • Number of submissions accepted: 36 • Acceptance Rate (Submissions Accepted / Submissions Received × 100): 100 • Average number of reviews per paper: 2.0277777777777777 • Total number of reviewers involved: 5 • Contact person for queries: Name: Syarifah Nur Aqida Syed Ahmad Email: aqida@umpsa.edu.my Affiliation: Universiti Malaysia Pahang Al-Sultan Abdullah

  • Mechanical Characterization of Welded P91 Steel
    The work presented in this study was performed to characterize the P91 base and weld metal by assessing the microstructure, tensile behaviour, hardness profile, creep behaviour and fracture morphology. Tensile test and short-term creep were performed on both the base and weld metal. For material characterisation, the optical microscope and hardness testing were employed. The fracture surface of the creep ruptured specimen was analyzed by SEM. The transgranular fracture mode was observed in both the base and weld material.

  • Optimization of Kerf Width in Wedm of Al-Si/5%Aln Mmc Using Taguchi Method and Anova
    Wire electrical discharge machining (WEDM) is a non-conventional machining method used to machine tough material involving The Al-Si/5%AlN metal matrix composites MMC, widely employed in various components, exhibits enhanced machinability with the inclusion of 5% Aluminum Nitride (AlN) as reinforcement. This study employs WEDM to analyze kerf width. Given the intricate nature of the WEDM process, this research emphasizes the necessity for optimization using advanced methodologies. Additionally, the supplementary Design of Experiments (DOE) method is applied to elucidate the relationship between factors influencing the process and the response. Taguchi’s L9 Orthogonal Array method organizes parameters: current (8A, 11A, 14A), Pulse On-Time (3µs, 6µs, 9µs), and Pulse Off-Time (9µs, 12µs, 15µs). From the results, it is evident that the experiment with the lowest kerf width value was experiment 7, yielding a value of 302.33µm. Furthermore, a detailed investigation was conducted, leveraging analysis of variance (ANOVA) on the collected kerf width results. This aimed to assess the impact of various parameters in the WEDM process on its overall effectiveness. The analysis revealed that current (C), contributing 88.16%, predominantly governs kerf width, surpassing the influence of pulse on time (Pon), with an impact value of 5.72%. Additionally, pulse off time (Poff), affecting the kerf width by 4.66%, was also a notable factor for the Al-Si/5%AlN MMC. In conclusion, this study has emphasized that the current (C) significantly influences the kerf distance during the machining of Al-Si/5%AlN using Wire Electrical Discharge Machining (WEDM).