Advancement of Mechanical Engineering in Extreme Environments

Qin, Zhen; Wu, Yu-Ting; Eizad, Amre; Lyu, Sung-Ki; Lee, Choon-Man

doi:10.1007/s40684-020-00295-3

Cited by 19 publications

(6 citation statements)

References 106 publications

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“…At the same time, fracture toughness tests involve using pre-cracked models that undergo exposure to tensile forces until a fracture happens. These tests mainly include determining the value of the stress intensity factor or the J-integral [34]. Characterizing impact and fracture-resistant testing results offers essential insight into the material's response when subjected to rapid loading circumstances and its ability to withstand crack development and expansion at higher temperatures [35].…”

Section: High-temperature Mechanical Testing Techniquesmentioning

confidence: 99%

High-Temperature Mechanical Characterization of Materials for Extreme Environments

Gupta,

Rajalakshmi,

Nijhawan

et al. 2024

E3S Web Conf.

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The growth of advanced technologies involves the development of materials that can withstand extreme environmental conditions, particularly elevated temperatures. This paper presents an in-depth examination of the mechanical properties of materials designed specifically for use in high-temperature environments, such as however confined to aviation, nuclear-powered reactors, and electrical power systems. Relevant significance is associated with assessing the mechanical robustness, resilience to deformation under constant stress, and ability to cope with high temperatures over a longer time for these materials. This study explores recent developments in materials science, focusing on the products made in alloys, ceramics, and composite materials such as nickel-based superalloys, silicon carbide (SiC), and composite based on zirconium diboride (ZrB2). A significant focus is placed on innovative testing methods, including high-temperature tensile tests, thermal shock resistance assessment, and fatigue testing, as these play a critical role in evaluating the performance of substances under challenging conditions. Further, this study explores the consequences of these findings on the choice of materials and the design process in engineering applications. Titanium superalloy operates effectively at lower temperatures, whereas Nickel-based 70% of the initial strength when heated to a higher temperature of 1100°C superalloy behaves superior under more extreme conditions.

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Section: High-temperature Mechanical Testing Techniquesmentioning

confidence: 99%

High-Temperature Mechanical Characterization of Materials for Extreme Environments

Gupta,

Rajalakshmi,

Nijhawan

et al. 2024

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…The precision processing capabilities of EDM remain unaffected by the physi chanical, thermomechanical, metallurgical, and chemical properties of workpiece als, making it suitable for a wide range of materials, including those with low e conductivity [115]. As materials science advances, leading to the development structural and functional materials with unique properties, the applications of ED tinue to expand in the industries [116]. New materials designed for extreme con characterized by low thermal conductivity, high melting temperatures, and high h (e.g., titanium and its alloys), are challenging to machine using conventional m This led to the adoption of non-conventional techniques such as electro-erosion t ogy.…”

Section: Experimental Datamentioning

confidence: 99%

“…These technologies introduce additional influences and phenomena to enhance workpiece material removal quality and rate while reducing tool wear. In accordance with study specifics, two primary EDM development directions are identified within the context of industry 4.0 and 5.0, and these are smart manufacturing [116] and green manufacturing [31].…”

Section: Process Modification and Development Directionsmentioning

confidence: 99%

Recent Trends and Developments in the Electrical Discharge Machining Industry: A Review

Kamenskikh,

Muratov,

Shlykov

et al. 2023

JMMP

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Electrical discharge machining (EDM) is a highly precise technology that not only facilitates the machining of components into desired shapes but also enables the alteration of the physical and chemical properties of workpieces. The complexity of the process is due to a number of regulating factors such as the material of the workpiece and tools, dielectric medium, and other process parameters. Based on the material type, electrode shape, and process configuration, various shapes and degrees of accuracy can be generated. The study of erosion is based on research into processing techniques, which are the primary tools for using EDM. Empirical knowledge with subsequent optimization of technological parameters is one of the ways to obtain the required surface quality of the workpiece with defect minimization, as well as mathematical and numerical modeling of the EDM process. This article critically examines all key aspects of EDM, reflecting both the early foundations of electrical erosion and the current state of the industry, noting the current trends towards the transition of EDM to the 5.0 industry zone in terms of safety and minimizing the impact of the process on the environment.

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“…In summary, this research endeavors to leverage multi-legged robot design principles, collective intelligence technologies, and advanced sensing systems to create a centipedelike rescue robot capable of operating effectively in diverse complex environments. This robot aims not only to improve rescue efficiency and accuracy but also to adapt to various rescue scenarios, playing a critical role in natural disasters and emergency rescue operations [57][58][59][60].…”

Section: Introductionmentioning

confidence: 99%

Self-Configurable Centipede-Inspired Rescue Robot

Hou,

Xue,

Liang

et al. 2024

Applied Sciences

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Drawing from the characteristics of centipedes, such as their low center of gravity, high stability in movement, adaptability to complex terrains, and ability to continue moving even after losing a limb, this paper designs a self-reconfigurable centipede-type rescue robot with relatively high stability while moving. The robot’s body can lift and traverse higher obstacles, and its multi-segmented structure enables self-disconnection and reconstruction for docking. Moreover, the proposed robot is adept at navigating diverse terrains and surmounting obstacles, equipped with a camera sensor facilitating life recognition, terrain surveying, scene understanding, and obstacle avoidance. Its capabilities prove advantageous for achieving challenging ground rescue missions. Motion stability tests, conducted across various terrains, showcase the robot’s ability to maintain a consistent movement path in rugged environments. Operating with a leg lift height of 0.02 m, the robot achieves a speed of 0.09 m per second. In simulated damaged conditions, the robot demonstrates the capacity to disconnect and reconnect its limbs swiftly, restoring movement capabilities within a single second. During environmental perception tasks, the robot processes and analyzes environmental data in real time at a rate of approximately 15 frames per second, with an 80% confidence level. With an F1 score exceeding 93% and an average precision rate surpassing 98%, the robot showcases its reliability and efficiency.

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Advancement of Mechanical Engineering in Extreme Environments

Cited by 19 publications

References 106 publications

High-Temperature Mechanical Characterization of Materials for Extreme Environments

High-Temperature Mechanical Characterization of Materials for Extreme Environments

Recent Trends and Developments in the Electrical Discharge Machining Industry: A Review

Self-Configurable Centipede-Inspired Rescue Robot

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