International journal of mechanical engineering

Exploring Aqueous Zinc-Based Batteries: From Active Materials to Future Applications

2025-06-18T20:07:21+08:00

Aqueous zinc-based batteries (AZBs) have gained significant attention as a promising alternative to conventional lithium-ion batteries due to their advantages of safety, low cost, and environmentally friendly operation. These batteries utilize aqueous electrolytes, making them inherently safer and easier to manufacture. However, challenges remain in improving their electrochemical performance, including issues related to dendrite growth, limited energy density, and cycle life. This review article provides an overview of the active materials used in AZBs, highlighting recent advancements in cathode and anode materials. We also discuss key aspects of device design, including electrolyte optimization, separator development, and system integration. Finally, the paper explores future directions for the development of AZBs, including strategies to enhance performance, improve cycle stability, and scale up production for commercial applications.

Advancements in Accessible Digital Restoration and Structural Forecasting For 3D-Printed Artificial Limbs

2025-06-18T20:07:36+08:00

The increasing demand for personalized and affordable prosthetic devices has led to significant advancements in 3D printing technologies. Accessible digital restoration methods and Structural forecasting models are revolutionizing the field of Artificial limbs by enabling precise, individualized designs that are both cost-effective and functional. This article explores the integration of digital tools, computational models, and 3D printing in creating high-performance prosthetic devices. It examines key techniques in digital restoration, such as CT scans and 3D modeling software, as well as the role of mechanical simulations in predicting the performance of Artificial limbs. The article also discusses the challenges, opportunities, and future directions of 3D-printed Artificial limbs, with a focus on accessibility, sustainability, and innovation.

Development of Thermoplastic Composites for Fdm-Type 3d Printers

2025-08-22T18:43:27+08:00

FDM – type 3D printing has greatly increased in recent years but there is still a demand for stronger and stiffer materials. The objective of this work is to extrude and test various types of thermoplastic composite filament to be used for 3D printing. ABS thermoplastics was combined with various lengths of fiberglass. Using these thermoplastic composites several specimens were prepared per ASTM D638 by compression molding and tested. The fiberglass was introduced to increase mechanical strength and stiffness of the thermoplastic filament. Three types of fiber sizing were evaluated, the original epoxy-based sizing, an alkoxysilane Gelest sizing, and a water-based Michelman sizing. One hundred specimens were fabricated from composite material. Specimens varied by sizing, by fiberglass lengths, and by fiberglass volume fraction. Out of all the specimens tested, those with Michelman sizing produced the most consistent and overall best bonding. The Gelest sizing produced the highest and lowest values. Epoxy sizing produced almost as good results, and no sizing was worst. FDM thermoplastic filament of 1.75 mm diameter was extruded, and was used on a ROBO 3D FDM printer to 3D print objects. Mechanical strength and stiffness were not improved as expected because fiber lengths were much shorter than advertised. Other possible reasons include incomplete mixing of materials, processing errors, voids in specimens, and improper treatment of fibers with sizing.